Here you can find the source of substring(String s, int i, String substring, int direction)
private static String substring(String s, int i, String substring, int direction)
//package com.java2s; /**/*w w w. j a va 2 s .c o m*/ * Copyright ? 2013 - 2017 WaveMaker, Inc. * * 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. */ public class Main { private static String substring(String s, int i, String substring, int direction) { if (direction >= 0) { return s.substring(i + substring.length()); } else { return s.substring(0, i); } } }