Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.File;

public class Main {
    /**
     * If filename is "abc.def", return "def".
     * @param fin File to get extension
     * @return String extension without '.'
     */
    public static String getExtension(File fin) {
        //if a file named "abc.def" , then return "def" .
        String fname = fin.getName();
        //To find the last ''
        int where = 0;
        for (int i = fname.length() - 1; i >= 0; --i) {
            if (fname.charAt(i) == '.') {
                where = i;
                break;
            }
        }

        if (where == 0 || where >= fname.length()) {
            return "";
        } else {
            return fname.substring(where + 1);
        }
    }
}