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annotate dwt/internal/Compatibility.d @ 45:d8635bb48c7c

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Merge with SWT 3.5
author Jacob Carlborg <doob@me.com>
date Mon, 01 Dec 2008 17:07:00 +0100
parents f565d3a95c0a
children 38807a925e24
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45
d8635bb48c7c Merge with SWT 3.5
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *
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11 * Port to the D programming language:
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12 * Frank Benoit <benoit@tionex.de>
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13 * Jacob Carlborg <jacob.carlborg@gmail.com>
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14 *******************************************************************************/
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15 module dwt.internal.Compatibility;
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16
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17 import tango.sys.Process;
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18
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19 import dwt.DWT;
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20 import dwt.dwthelper.BufferedInputStream;
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21 public import dwt.dwthelper.FileInputStream;
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22 public import dwt.dwthelper.FileOutputStream;
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23 public import dwt.dwthelper.InflaterInputStream;
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24 import dwt.dwthelper.ResourceBundle;
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25 import dwt.dwthelper.utils;
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27 /+
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28 import java.io.File;
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29 import java.text.MessageFormat;
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30 import java.util.zip.DeflaterOutputStream;
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31 import java.util.zip.InflaterInputStream;
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32 +/
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33
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34 /**
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35 * This class is a placeholder for utility methods commonly
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36 * used on J2SE platforms but not supported on some J2ME
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37 * profiles.
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38 * <p>
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39 * It is part of our effort to provide support for both J2SE
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40 * and J2ME platforms.
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41 * </p>
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42 * <p>
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43 * IMPORTANT: some of the methods have been modified from their
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44 * J2SE parents. Refer to the description of each method for
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45 * specific changes.
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46 * </p>
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47 * <ul>
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48 * <li>Exceptions thrown may differ since J2ME's set of
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49 * exceptions is a subset of J2SE's one.
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50 * </li>
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51 * <li>The range of the mathematic functions is subject to
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52 * change.
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53 * </li>
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54 * </ul>
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55 */
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56 public final class Compatibility {
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57
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58 /**
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59 * Returns the PI constant as a double.
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60 */
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61 public static const real PI = Math.PI;
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63 static const real toRadians = PI / 180;
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64
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65 /**
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66 * Answers the length of the side adjacent to the given angle
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67 * of a right triangle. In other words, it returns the integer
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68 * conversion of length * cos (angle).
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69 * <p>
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70 * IMPORTANT: the j2me version has an additional restriction on
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71 * the argument. length must be between -32767 and 32767 (inclusive).
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72 * </p>
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73 *
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74 * @param angle the angle in degrees
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75 * @param length the length of the triangle's hypotenuse
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76 * @return the integer conversion of length * cos (angle)
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77 */
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78 public static int cos(int angle, int length) {
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79 return cast(int)(Math.cos(angle * toRadians) * length);
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80 }
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81
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82 /**
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83 * Answers the length of the side opposite to the given angle
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84 * of a right triangle. In other words, it returns the integer
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85 * conversion of length * sin (angle).
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86 * <p>
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87 * IMPORTANT: the j2me version has an additional restriction on
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88 * the argument. length must be between -32767 and 32767 (inclusive).
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89 * </p>
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90 *
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91 * @param angle the angle in degrees
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92 * @param length the length of the triangle's hypotenuse
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93 * @return the integer conversion of length * sin (angle)
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94 */
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95 public static int sin(int angle, int length) {
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96 return cast(int)(Math.sin(angle * toRadians) * length);
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97 }
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98
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99 /**
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100 * Answers the most negative (i.e. closest to negative infinity)
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101 * integer value which is greater than the number obtained by dividing
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102 * the first argument p by the second argument q.
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103 *
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104 * @param p numerator
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105 * @param q denominator (must be different from zero)
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106 * @return the ceiling of the rational number p / q.
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107 */
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108 public static int ceil(int p, int q) {
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109 return cast(int)Math.ceil(cast(float)p / q);
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110 }
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111
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112 /**
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113 * Answers whether the indicated file exists or not.
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114 *
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115 * @param parent the file's parent directory
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116 * @param child the file's name
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117 * @return true if the file exists
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118 */
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119 public static bool fileExists(String parent, String child) {
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120 return (new File (parent, child)).exists();
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121 }
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122
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123 /**
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124 * Answers the most positive (i.e. closest to positive infinity)
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125 * integer value which is less than the number obtained by dividing
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126 * the first argument p by the second argument q.
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127 *
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128 * @param p numerator
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129 * @param q denominator (must be different from zero)
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130 * @return the floor of the rational number p / q.
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131 */
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132 public static int floor(int p, int q) {
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133 return cast(int)Math.floor(cast(double)p / q);
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134 }
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135
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136 /**
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137 * Answers the result of rounding to the closest integer the number obtained
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138 * by dividing the first argument p by the second argument q.
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139 * <p>
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140 * IMPORTANT: the j2me version has an additional restriction on
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141 * the arguments. p must be within the range 0 - 32767 (inclusive).
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142 * q must be within the range 1 - 32767 (inclusive).
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143 * </p>
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144 *
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145 * @param p numerator
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146 * @param q denominator (must be different from zero)
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147 * @return the closest integer to the rational number p / q
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148 */
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149 public static int round(int p, int q) {
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150 return cast(int)Math.round(cast(float)p / q);
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151 }
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152
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153 /**
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154 * Returns 2 raised to the power of the argument.
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155 *
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156 * @param n an int value between 0 and 30 (inclusive)
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157 * @return 2 raised to the power of the argument
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158 *
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159 * @exception IllegalArgumentException <ul>
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160 * <li>ERROR_INVALID_RANGE - if the argument is not between 0 and 30 (inclusive)</li>
0
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161 * </ul>
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162 */
12
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163 public static int pow2(int n) {
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164 if (n >= 1 && n <= 30)
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165 return 2 << (n - 1);
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166 else if (n != 0) {
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167 DWT.error(DWT.ERROR_INVALID_RANGE);
0
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168 }
12
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169 return 1;
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170 }
0
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171
12
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172 /**
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173 * Create an DeflaterOutputStream if such things are supported.
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174 *
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175 * @param stream the output stream
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176 * @return a deflater stream or <code>null</code>
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177 * @exception IOException
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178 *
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179 * @since 3.4
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180 */
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181 public static OutputStream newDeflaterOutputStream(OutputStream stream) {
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182 implMissing(__FILE__,__LINE__);
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183 return null;
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184 //DWT_TODO return new DeflaterOutputStream(stream);
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185 }
0
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186
12
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187 /**
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188 * Open a file if such things are supported.
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189 *
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190 * @param filename the name of the file to open
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191 * @return a stream on the file if it could be opened.
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192 * @exception IOException
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193 */
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194 public static InputStream newFileInputStream(String filename) {
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195 return new FileInputStream(filename);
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196 }
0
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197
12
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198 /**
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199 * Open a file if such things are supported.
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200 *
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201 * @param filename the name of the file to open
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202 * @return a stream on the file if it could be opened.
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203 * @exception IOException
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204 */
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205 public static OutputStream newFileOutputStream(String filename) {
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206 return new FileOutputStream(filename);
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207 }
0
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208
12
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209 /**
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210 * Create an InflaterInputStream if such things are supported.
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diff changeset
211 *
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212 * @param stream the input stream
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diff changeset
213 * @return a inflater stream or <code>null</code>
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diff changeset
214 * @exception IOException
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diff changeset
215 *
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
216 * @since 3.3
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217 */
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diff changeset
218 public static InflaterInputStream newInflaterInputStream(InputStream stream) {
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219 return new InflaterInputStream(stream);
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220 }
0
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221
12
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diff changeset
222 /**
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223 * Answers whether the character is a letter.
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diff changeset
224 *
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diff changeset
225 * @param c the character
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diff changeset
226 * @return true when the character is a letter
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diff changeset
227 */
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
228 public static bool isLetter(dchar c) {
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diff changeset
229 return Character.isLetter(c);
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230 }
0
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231
12
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diff changeset
232 /**
34bfdb096054 Ported dwt.internal.Compatibility
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233 * Answers whether the character is a letter or a digit.
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diff changeset
234 *
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diff changeset
235 * @param c the character
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diff changeset
236 * @return true when the character is a letter or a digit
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diff changeset
237 */
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diff changeset
238 public static bool isLetterOrDigit(dchar c) {
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diff changeset
239 return Character.isLetterOrDigit(c);
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240 }
0
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241
12
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diff changeset
242 /**
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
243 * Answers whether the character is a Unicode space character.
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
244 *
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diff changeset
245 * @param c the character
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diff changeset
246 * @return true when the character is a Unicode space character
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
247 */
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
248 public static bool isSpaceChar(dchar c) {
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
249 return Character.isSpaceChar(c);
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diff changeset
250 }
0
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251
12
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diff changeset
252 /**
34bfdb096054 Ported dwt.internal.Compatibility
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parents: 0
diff changeset
253 * Answers whether the character is a whitespace character.
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parents: 0
diff changeset
254 *
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
255 * @param c the character to test
34bfdb096054 Ported dwt.internal.Compatibility
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parents: 0
diff changeset
256 * @return true if the character is whitespace
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257 */
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258 public static bool isWhitespace(dchar c) {
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259 return Character.isWhitespace(c);
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260 }
0
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261
12
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262 /**
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263 * Execute a program in a separate platform process if the
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264 * underlying platform support this.
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265 * <p>
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266 * The new process inherits the environment of the caller.
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267 * </p>
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268 *
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269 * @param prog the name of the program to execute
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270 *
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271 * @exception ProcessException
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272 * if the program cannot be executed
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273 */
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274 public static void exec(String prog) {
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275 auto proc = new Process( prog );
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276 proc.execute;
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277 }
0
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278
12
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279 /**
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280 * Execute progArray[0] in a separate platform process if the
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281 * underlying platform support this.
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282 * <p>
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283 * The new process inherits the environment of the caller.
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284 * <p>
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285 *
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286 * @param progArray array containing the program to execute and its arguments
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287 *
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288 * @exception ProcessException
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289 * if the program cannot be executed
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290 */
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291 public static void exec(String[] progArray) {
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292 auto proc = new Process( progArray );
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293 proc.execute;
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294 }
0
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295
12
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296 private static ResourceBundle msgs = null;
0
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297
12
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298 /**
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299 * Returns the NLS'ed message for the given argument. This is only being
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300 * called from DWT.
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301 *
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302 * @param key the key to look up
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303 * @return the message for the given key
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304 *
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305 * @see DWT#getMessage(String)
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306 */
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307 public static String getMessage(String key) {
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308 String answer = key;
0
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309
12
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310 /*if (key is null) {
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311 DWT.error (DWT.ERROR_NULL_ARGUMENT);
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312 }*/
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313 if (msgs is null) {
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314 try {
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315 msgs = ResourceBundle.getBundle("dwt.internal.SWTMessages"); //$NON-NLS-1$
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316 } catch (IOException ex) {
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317 answer = key ~ " (no resource bundle)"; //$NON-NLS-1$
0
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318 }
12
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319 }
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320 if (msgs !is null) {
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321 try {
34bfdb096054 Ported dwt.internal.Compatibility
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322 answer = msgs.getString(key);
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323 } catch (MissingResourceException ex2) {}
0
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324 }
12
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325 return answer;
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326 }
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327 /++ PORTING_LEFT
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328 public static String getMessage(String key, Object[] args) {
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329 String answer = key;
0
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330
12
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331 if (/*key == null ||*/ args is null) {
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diff changeset
332 DWT.error (DWT.ERROR_NULL_ARGUMENT);
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diff changeset
333 }
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diff changeset
334 if (msgs is null) {
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diff changeset
335 try {
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
336 msgs = ResourceBundle.getBundle("dwt.internal.SWTMessages"); //$NON-NLS-1$
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diff changeset
337 } catch (IOException ex) {
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338 answer = key + " (no resource bundle)"; //$NON-NLS-1$
0
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339 }
12
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diff changeset
340 }
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
341 if (msgs !is null) {
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
342 try {
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
343 MessageFormat formatter = new MessageFormat("");
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
344 formatter.applyPattern(msgs.getString(key));
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
345 answer = formatter.format(args);
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
346 } catch (MissingResourceException ex2) {}
0
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347 }
12
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
348 return answer;
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
349 }
34bfdb096054 Ported dwt.internal.Compatibility
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350 +/
34bfdb096054 Ported dwt.internal.Compatibility
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351 /**
34bfdb096054 Ported dwt.internal.Compatibility
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352 * Interrupt the current thread.
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diff changeset
353 * <p>
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
354 * Note that this is not available on CLDC.
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
355 * </p>
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356 */
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diff changeset
357 public static void interrupt() {
34bfdb096054 Ported dwt.internal.Compatibility
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358 //PORTING_FIXME: how to implement??
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diff changeset
359 //Thread.currentThread().interrupt();
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
360 }
0
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361
12
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parents: 0
diff changeset
362 /**
34bfdb096054 Ported dwt.internal.Compatibility
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parents: 0
diff changeset
363 * Compares two instances of class String ignoring the case of the
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
364 * characters and answers if they are equal.
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
365 *
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
366 * @param s1 string
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
367 * @param s2 string
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
368 * @return true if the two instances of class String are equal
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
369 */
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
370 public static bool equalsIgnoreCase(String s1, String s2) {
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
371 return s1.equalsIgnoreCase(s2);
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
372 }
0
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373
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374 }