package Test;
/**
* == 代表比较双方是否相同。如果是基本类型则表示值相等,如果
* 是引用类型则表示地址相等即是同一个对象。
*
* Object类中定义有:public boolean equals(Object)方法,
* 提供定义“对象内容相等”的逻辑
*
* equals 默认判断是否是同一个对象,如果是String类则比较内容
* @author pmc
*
*/
public class Equals {
public static void main(String[] args){
User u1=new User(1000,"张三","123456");
User u2=new User(1000,"李四","123456");
System.out.println(u1==u2);
System.out.println(u1.equals(u2));
}
}
class User{
int id;
String name;
String pwd;
public User(int id, String name, String pwd) {
super();
this.id = id;
this.name = name;
this.pwd = pwd;
}
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + id;
return result;
}
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
User other = (User) obj;
if (id != other.id)
return false;
return true;
}
}
Java_79_equals_==
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转载自blog.csdn.net/pmcasp/article/details/104959423
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