Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.io.File;

public class Main {
    /**
     * Gets the extension of a file.
     *
     * @param f the file
     * @return the extension of the file.
     */
    public static String getExtension(File f) {
        return getExtension(f.getName());
    }

    /**
     * Gets the extension of a file.
     *
     * @param fileName the file name
     * @return the extension of the file.
     */
    public static String getExtension(String fileName) {
        String ext = null;
        int i = fileName.lastIndexOf('.');

        if (i > 0 && i < fileName.length() - 1) {
            ext = fileName.substring(i + 1).toLowerCase();
        }
        return ext;
    }
}