类方法学习二:getClasses()、getDeclaredClasses()

转自：http://blog.csdn.net/csdn1234/article/details/2563806

 

一.定义

Class[] getDeclaredClasses()

返回类中定义的公共、私有、保护的内部类和接口。但不包括继承的内部类和接口。

Class[] getClasses()

返回类定义的公共的内部类和接口,以及从父类、父接口那里继承来的内部类和接口

二.例子

1.GrandFather.java

public class GrandFather {
public class ClassG_Pub {
int x;
}
class ClassG_Pro {
int x;
}
private class ClassG_Pri {
int x;
}
public interface InterfG_Pub {
public String getName();
}
interface InterfG_Pro {
public String getName();
}
private interface InterfG_Pri {
public String getName();
}
}

public class GrandFather {

  public class ClassG_Pub {

    int x;

  }

  

  class ClassG_Pro {

    int x;

  }

  

  private class ClassG_Pri {

    int x;

  }

  public interface InterfG_Pub {

    public String getName();

  }

  

  interface InterfG_Pro {

    public String getName();

  }

  

  private interface InterfG_Pri {

    public String getName();

  }

  

}

2.Father.java

public class Father extends GrandFather{
public class ClassF_Pub {
int x;
}
class ClassF_Pro {
int x;
}
private class ClassF_Pri {
int x;
}
public interface InterfF_Pub {
public String getName();
}
interface InterfF_Pro {
public String getName();
}
private interface InterfF_Pri {
public String getName();
}
}

public class Father extends GrandFather{

  public class ClassF_Pub {

    int x;

  }

  

  class ClassF_Pro {

    int x;

  }

  

  private class ClassF_Pri {

    int x;

  }

  public interface InterfF_Pub {

    public String getName();

  }

  

  interface InterfF_Pro {

    public String getName();

  }

  

  private interface InterfF_Pri {

    public String getName();

  }

  

}

3.Son.java

public class Son extends Father{
public class ClassS_Pub {
int x;
}
class ClassS_Pro {
int x;
}
private class ClassS_Pri {
int x;
}
public interface InterfS_Pub {
public String getName();
}
interface InterfS_Pro {
public String getName();
}
private interface InterfS_Pri {
public String getName();
}
public static void main(String args[]) throws Exception{
System.out.println("getClasses:");
for (Class c:Son.class.getClasses()) {
System.out.println("class name:" + c.getName());
}
System.out.println("getDeclaredClasses:");
for (Class c:Son.class.getDeclaredClasses()) {
System.out.println("class name:" + c.getName());
}
}
}

public class Son extends Father{

  public class ClassS_Pub {

    int x;

  }

  

  class ClassS_Pro {

    int x;

  }

  

  private class ClassS_Pri {

    int x;

  }

  public interface InterfS_Pub {

    public String getName();

  }

  

  interface InterfS_Pro {

    public String getName();

  }

  

  private interface InterfS_Pri {

    public String getName();

  }

  

  public static void main(String args[]) throws Exception{

    System.out.println("getClasses:");

    for (Class c:Son.class.getClasses()) {

      System.out.println("class name:" + c.getName());

    }

    

    System.out.println("getDeclaredClasses:");

    for (Class c:Son.class.getDeclaredClasses()) {

      System.out.println("class name:" + c.getName());

    }

  }



}

4.java Son的输出结果是:

getClasses:
class name:Son$InterfS_Pub
class name:Son$ClassS_Pub
class name:Father$InterfF_Pub
class name:Father$ClassF_Pub
class name:GrandFather$InterfG_Pub
class name:GrandFather$ClassG_Pub
getDeclaredClasses:
class name:Son$InterfS_Pri
class name:Son$InterfS_Pro
class name:Son$InterfS_Pub
class name:Son$ClassS_Pri
class name:Son$ClassS_Pro
class name:Son$ClassS_Pub