Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*  Copyright (c) 2010 Xiaoyun Zhu
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining a copy  
 *  of this software and associated documentation files (the "Software"), to deal  
 *  in the Software without restriction, including without limitation the rights  
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell  
 *  copies of the Software, and to permit persons to whom the Software is  
 *  furnished to do so, subject to the following conditions:
 *  
 *  The above copyright notice and this permission notice shall be included in  
 *  all copies or substantial portions of the Software.
 *  
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE  
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER  
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,  
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN  
 *  THE SOFTWARE.  
 */

import java.io.IOException;

public class Main {
    public static String unescapeCode(String str) throws IOException {
        StringBuffer sb = new StringBuffer(str.length());
        int sz = str.length();
        StringBuffer unicode = new StringBuffer(4);
        boolean hadSlash = false;
        boolean inUnicode = false;
        for (int i = 0; i < sz; i++) {
            char ch = str.charAt(i);
            if (inUnicode) {
                unicode.append(ch);
                if (unicode.length() == 4) {
                    try {
                        int value = Integer.parseInt(unicode.toString(), 16);
                        sb.append((char) value);
                        unicode.setLength(0);
                        inUnicode = false;
                        hadSlash = false;
                    } catch (NumberFormatException nfe) {
                        // ignore
                    }
                }
                continue;
            }
            if (hadSlash) {
                hadSlash = false;
                switch (ch) {
                case '\\':
                    sb.append('\\');
                    break;
                case '\'':
                    sb.append('\'');
                    break;
                case '\"':
                    sb.append('"');
                    break;
                case 'r':
                    sb.append('\r');
                    break;
                case 'f':
                    sb.append('\f');
                    break;
                case 't':
                    sb.append('\t');
                    break;
                case 'n':
                    sb.append('\n');
                    break;
                case 'b':
                    sb.append('\b');
                    break;
                case 'u': {
                    inUnicode = true;
                    break;
                }
                default:
                    sb.append(ch);
                    break;
                }
                continue;
            } else if (ch == '\\') {
                hadSlash = true;
                continue;
            }
            sb.append(ch);
        }
        if (hadSlash) {
            sb.append('\\');
        }
        return sb.toString();
    }
}