重写object类中的equals方法

Posted 2020-09-05 初学者

package equalsdemo;
/*
 * 重写object中的equals方法
 */
public class equalsdemo {
public static void main(String[] args) {
    person p1 = new person("zhangsan",54);
    person p2 = new person("zhangsan",54);
    if (p1.equals(p2)) {
        System.out.println("这两个对象相等！！！");
    }
    else {
        System.out.println("这两个 no 对象相等！！！");
    }
}
}
class person{
    private String name;
    private int age;
    public person(String name,int age){
        this.name = name;
        this.age = age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public int getAge() {
        return age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    //复写equals方法
    @Override
    public boolean equals(Object obj) {
        // TODO Auto-generated method stub
        //如果两个对象地址相等则相等
        if (this==obj) {
            return true;
        }
        //判断两个对象的值是否相等
        //把传递过来的obj向下转型
        person p = (person)obj;
        if (p.getName().equals(this.getName())&&p.getAge()==this.getAge()) {
            return true;
        }
        else {
            return false;
        }        
    }    
}