Get the difference between two strings : Substring « Data Type « Java Tutorial

1. Java Tutorial
2. Data Type
3. Substring

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to you 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 Utils {
  public static String diff(String str1, String str2) {
    int index = str1.lastIndexOf(str2);
    if (index > -1) {
      return str1.substring(str2.length());
    }
    return str1;
  }
}