Java-得到类的包

 package com.tj;

 public class MyClass2 {
     public static void main(String[] args) {
         Class cls = java.lang.String.class;
         Package pkg = cls.getPackage();
         String name = pkg.getName();
         System.out.println(name);

         cls = MyClass2.class;
         pkg = cls.getPackage();
         name = pkg.getName();
         System.out.println(name);

         pkg = int.class.getPackage();
         System.out.println(pkg);
         pkg = int[].class.getPackage();
         System.out.println(pkg);
     }
 }