testclass.java

本书是一本为Java学习者在基础内容学习结束后进行课程设计时提供参考的指导书

package apibook.c2.s3;

import java.security.*;
public class TestClass {
  public interface testi1{
    public class c1{
    }
    interface i2{
    }
  }
  public class testc2 implements testi1{
    public class c2{
    }
  }
  public class testc3 extends testc2{
    public class c3{
    }
    class c4{
    }
  }
  public TestClass() {
  }
  public static void  printClasses(String msg,Class[] cls){
    System.out.println(msg+": ");
    for (int i = 0; i < cls.length&&cls!=null; i++) {
      System.out.print(cls[i].getName()+" ");
    }
    System.out.println();
  }
  public static void main(String[] args) {
    TestClass.printClasses("testc2.getClasses",testc2.class.getClasses());
    TestClass.printClasses("testc2.getDeclaredClasses",testc2.class.getDeclaredClasses());

    TestClass.printClasses("testi1.getClasses",testi1.class.getClasses());
    TestClass.printClasses("testi1.getDeclaredClasses",testi1.class.getDeclaredClasses());

    TestClass.printClasses("testc3.getClasses",testc3.class.getClasses());
    TestClass.printClasses("testc3.getDeclaredClasses",testc3.class.getDeclaredClasses());

    System.out.println(testi1.class.getDeclaringClass());
    System.out.println(testi1.c1.class.getDeclaringClass());
    System.out.println(testc2.c2.class.getDeclaringClass());
    System.out.println(testc3.c2.class.getDeclaringClass());

    try {
      Class cc=Class.forName("testc2",true,ClassLoader.getSystemClassLoader());

      ProtectionDomain pd = cc.getProtectionDomain();
      System.out.println("code source:"+pd.getCodeSource());
      System.out.println("permissions:"+pd.getPermissions());
    }
    catch (ClassNotFoundException ex) {
      System.out.println(ex);
    }
  }
}