JAVA重写equals方法

public class new4 {
//学生ID
public String id;
//学生姓名
public String name;

public new4(String idCard, String name) {
this.id = idCard;
this.name = name;
    }

//重写equals方法
public boolean equals(Object obj) {
        new4 e = (new4) obj;
if (id == null) {
if (e.id != null)
return false;
        } else if (!id.equals(e.id))
return false;
if (name == null) {
if (e.name != null)
return false;
        } else if (!name.equals(e.name))
return false;
return true;
    }

public static void main(String[] args) {
        new4 p1 = new new4("1001", "我帅");
        new4 p2 = new new4("1001", "我丑");
        System.out.println(p1.equals(p2));
    }
}