Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (c) 2013, 2014 Denis Nikiforov.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *    Denis Nikiforov - initial API and implementation
 */

public class Main {
    public static int computeLevenshteinDistance(CharSequence str1, CharSequence str2) {
        int[][] distance = new int[str1.length() + 1][str2.length() + 1];
        for (int i = 0; i <= str1.length(); i++) {
            distance[i][0] = i;
        }
        for (int j = 0; j <= str2.length(); j++) {
            distance[0][j] = j;
        }
        for (int i = 1; i <= str1.length(); i++) {
            for (int j = 1; j <= str2.length(); j++) {
                distance[i][j] = minimum(distance[i - 1][j] + 1, distance[i][j - 1] + 1,
                        distance[i - 1][j - 1] + ((str1.charAt(i - 1) == str2.charAt(j - 1)) ? 0 : 1));
            }
        }
        return distance[str1.length()][str2.length()];
    }

    private static int minimum(int a, int b, int c) {
        return Math.min(Math.min(a, b), c);
    }
}