Java Java.lang.Class.getSuperclass()用法及代碼示例

描述

這個java.lang.Class.getSuperclass()返回表示該類所表示的實體(類、接口、原始類型或 void)的超類的類。

聲明

以下是聲明java.lang.Class.getSuperclass()方法

public Class<? super T> getSuperclass()

參數

NA

返回值

此方法返回此對象表示的類的超類。

異常

NA

示例

下麵的例子展示了 java.lang.Class.getSuperclass() 方法的用法。

package com.tutorialspoint;

import java.lang.*;

class superClass {
   // super class
}

class subClass extends superClass {
   // sub class
}

public class ClassDemo {

   public static void main(String args[]) {

      superClass val1 = new superClass();
      subClass val2 = new subClass();
      Class cls;

      cls = val1.getClass(); 
      System.out.println("val1 is object of type = " + cls.getName());

      /* returns the superclass of the class(superClass) represented 
         by this object */
      cls = cls.getSuperclass();
      System.out.println("super class of val1 = " + cls.getName());

      cls = val2.getClass(); 
      System.out.println("val2 is object of type = " + cls.getName());
     
      /* returns the superclass of the class(subClass) represented
         by this object */
      cls = cls.getSuperclass();
      System.out.println("super class of val2 = " + cls.getName());
   }
}

讓我們編譯並運行上麵的程序，這將產生以下結果——

val1 is object of type = com.tutorialspoint.superClass
super class of val1 = java.lang.Object
val2 is object of type = com.tutorialspoint.subClass
super class of val2 = com.tutorialspoint.superClass