package bbb;
public class Person {
 private String name;
 private int age;
 public Person(){
 public Person(String name){ = name;
 public Person(int age){
  this.age = age;
 public Person(String name,int age){ = name;
  this.age = age;
 public String getName(String name){
  return name;
 public void setName(String name){ = name;
 public int getage(int age){
  return age;
 public void setAge(int age){
   this.age = age;
 public void printMessage(){
  System.out.println("name = "+name+",age = "+age);
 public void addAge(){

package bbb;
public class TestPerson{
 public static void main(String[] args) {
  Person p1 = new Person(" Cai Xukun ",30);
  Person p2 = new Person(" Juen-Kai Wang ",20);
  Person p3 = new Person();

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