Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * 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 Main {
    /**
     * Compare two strings, and return the index at which the strings begin to differ.
     * <p>
     * E.g. strdiff("i am a machine", "i am a robot") -> 7
     * </p>
     *
     * @return the index where s2 and s1 begin to differ; -1 if they are equal
     */
    public static int differenceAt(String s1, String s2) {
        int i;
        for (i = 0; (i < s1.length()) && (i < s2.length()); ++i) {
            if (s1.charAt(i) != s2.charAt(i)) {
                break;
            }
        }
        if ((i < s2.length()) || (i < s1.length())) {
            return i;
        }
        return -1;
    }
}