Java-确定被加载类的路径

如何输出当前类在硬盘的物理路径

 package com.tj;

 import java.net.URL;
 import java.security.CodeSource;
 import java.security.ProtectionDomain;

 public class MyClass2 {
     Class cls = this.getClass();
     ProtectionDomain pDomain = cls.getProtectionDomain();
     CodeSource cSource = pDomain.getCodeSource();
     URL loc = cSource.getLocation();

     public URL getLoc(){
         return this.loc;
     }
     public static void main(String[] args) {
         MyClass2 m = new MyClass2();
         System.out.println(m.getLoc());
     }

 }