overridingtest1.java

java程序设计 清华出版社 孙燮华老师编写的程序源代码

//overridingTest1.java
class overridingTest1{
  void print(){
    System.out.println("This is the superclass!");
  }
  
  public static void main(String args[]){
    overridingTest1 superp = new overridingTest1();
    superp.print();
    extendtest subp = new extendtest();
    subp.print();
  }
}

class extendtest extends overridingTest1{
  void print(){                    //覆盖父类的print()方法
    System.out.println("This is the subclass!");
    super.print();                 //通过super.调用父类的print()方法
  }
}