public class A extends AB{

String name;

int age;

public A (String name,int age){

super(name, age);

}

}

public class B extends AB{

String name;

int age;

public B(String name, int age) {

super(name, age);

}

}

public class AB {

String name;

int age;

public AB(String name, int age) {

this.name = name;

this.age = age;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

@Override

public String toString() {

return "AB [name=" + name + ", age=" + age + "]";

}

}

 

 

import java.util.ArrayList;

 

import java.util.List;

public class TestArrayList {

public static void main(String[] args) {

List<AB> list = new ArrayList<AB>();

list.add(new A("lz", 20));

list.add(new B("LZ", 20));

System.out.println(list.toString());

}

}

 pasting

[AB [name=lz, age=20], AB [name=LZ, age=20]]