import java.util.Objects;

public class Person {

private String name;

private int age;

// public void setName (String str) {

// name = str;

// }

void show () {

System.out.println("nam:" + this.name);

}

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (o == null || getClass() != o.getClass()) return false;

Person person = (Person) o;

return age == person.age &&

Objects.equals(name, person.name);

}

@Override

public int hashCode() {

return Objects.hash(name, age);

}

/*@Override // 重写

public boolean equals(Object obj) {

// 向下转型

// Person p = (Person)obj;

// boolean b = this.name.equals(p.name) && this.age == p.age;

// return b;

if (obj instanceof Person) {

//使用向下转型,把obj转换为Person类型

Person p = (Person)obj;

//比较两个对象的属性,一个对象是this(p1),一个对象是p(obj->p2)

// boolean b = this.name.equals(p.name) && this.ag//使用向下转型,把obj转换为Person类型

Person p = (Person)obj;

//比较两个对象的属性,一个对象是this(p1),一个对象是p(obj->p2)

// boolean b = this.name.equals(p.name) && this.age==p.age;

boolean b = this.name == p.name && this.age==p.age;

return b;e==p.age;

boolean b = this.name == p.name && this.age==p.age;

return b;

}

return false;

}*/

public Person () {

System.out.println("no arguments");

}

// 重载

public Person (String name) {

System.out.println("全参构造方法." + name );

this.name = name;

}

public Person (String name, int age) {

this.name = name;

this.age = age;

}

}