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public class TestOverLoad {

public static void main(String[] args) {

Person p = new Person();

Person p1 = new Person(400);

Person p2 = new Person(2, 500);

p.info();

p.info("ok");

}

}

class Person {

Person() {

id = 0;

age = 20;

}

Person(int _id) {

id = _id;

age = 23;

}

Person(int _id, int _age) {

id = _id;

age = _age;

}

//³ÉÔ±±äÁ¿¶¨Òå

private int id;

private int age = 20;

//·½·¨¶¨Òå

public int getAge() {return age;}

public void setAge(int i) {age = i;}

public int getId() {return id;}

void info() {

System.out.println("my id is : " + id);

}

void info(String t) {

System.out.println(t + " id " + id);

}

}