java get absolute path from relative path

/**
 * @author lautturi.com
 * Java example: java get absolute path of file
 */

import java.util.*;
import java.io.File;

public class Lautturi {

	public static void main(String[] args) {
		File file = new File("test.txt");
		String path = file.getAbsolutePath();
		System.out.println("absolutePath:"+path);
	}
}