Java-Renaming a file

	import java.io.*;

	class TestFile {
	    public static void main(String[] args) throws Exception {
	        File file = new File(args[0]);
	        System.out.println(file.getAbsolutePath());

	        File oldFile = new File("a.txt");
	        File newFile = new File("b.txt");
	        oldFile.renameTo(newFile);

	        if (new File("a.txt").renameTo(new File("b.txt"))) {	       
	        } else {
	        }

	    }
	}