重写equals方法

public class Student {
String school;

String name;

int age;

public Student (String name,int age,String s){
this.name=name;

this.age=age;
this.school=s;
}
public boolean equals(Object obj){
Student stu=null;

//判断obj是不是属于Student类型，如果是就将其强制转换为Student类型传给变量stu
if(obj instanceof Student){
stu=(Student)obj;
}
else{
return false;
}

//判断对象里面的所有内容是否都相同，如果是返回true，不是返回false
if(stu.name==this.name&&stu.age==this.age&&stu.school==this.school){
return true;
}
else{
return false;
}
}

public static void main(String[]args){　　

Student s1=new Student("joke",12,"gump");
Student s2=new Student("joke",12,"gump");
System.out.println(s1.equals(s2));

}
}