Java File Extension Name Get getFileExtension(File file)

Description

get File Extension

License

Apache License

Declaration

public static String getFileExtension(File file) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.File;

public class Main {
    public static String getFileExtension(File file) {

        String filename = file.getName();
        int extensionIndex = filename.lastIndexOf(".");
        String extension;/*  w w w.j a va 2s .  c  om*/
        if (extensionIndex == -1) {
            extension = "";
        } else {
            extension = filename.substring(extensionIndex + 1, filename.length());
        }

        return extension;
    }
}

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