谁能给我举个JAVA中关于 SUPER的例子，简单的就行。谢谢！

class A{
A(){
super();
}
}

public class A{
public A(){
System.out.println("this A class");
}

public void execute(){
System.out.println("this A class execute() ");
}
}

public class B extends A{
public B(){
super();
System.out.println(" this B Class ");
}

public void execute(){
super.execute();
System.out.println("this B Class execute() ");
}
}

public Run{
public static void main(String[] args){
new B().execute();
}
}