Here you can find the source of toURLString(String s)
public static String toURLString(String s)
//package com.java2s; /*************************************************************************** * Copyright (c) 2012-2013 VMware, Inc. All Rights Reserved. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License./*from w w w. j a v a 2 s . c om*/ ***************************************************************************/ public class Main { public static String toURLString(String s) { if (s == null) { return s; } StringBuffer buf = new StringBuffer(); for (int i = 0; i < s.length(); i++) { char ch = s.charAt(i); switch (ch) { case '%': buf.append("%25"); break; case '/': buf.append("%2f"); break; case '\\': buf.append("%5c"); break; default: buf.append(ch); } } return buf.toString(); } }