Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.io.File;

public class Main {
    /**
     * Gets the extension of a file name, like "png" or "jpg".
     * 
     * @param uri
     * @return Extension excluding the dot("."); "" if there is no extension;
     *         null if uri was null.
     */
    public static String getExtension(String uri) {
        if (uri == null) {
            return null;
        }

        int dot = uri.lastIndexOf(".");
        if (dot >= 0) {
            return uri.substring(dot + 1);
        } else {
            // No extension.
            return "";
        }
    }

    public static String getExtension(File file) {
        return getExtension(file.getName());
    }
}