实现Student类的equals重载函数

//测试类
public class StudentDemo {

    public static void main(String[] args) {
        Student s1 = new Student("000","张三",18);
        Student s2 = new Student("000","张三",18);//随便改
        boolean flag = s1.equals(s2);
        System.out.println(flag);
    }
}

//实现类Student
public class Student {

    //私有成员
    private String id;
    private String name;
    private int age;

    //带参构造函数
    public Student(String id, String name, int age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }

    //无参构造函数
    public Student() {
        super();
        // TODO Auto-generated constructor stub
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
    }

    public boolean equals(Object obj) {
        if (this == obj) 
            return true;
        if (obj == null) 
            return false; 
        if (getClass() != obj.getClass())  
            return false; 
        Student s = (Student) obj;
        if (id != s.id)  
            return false; 
        if (age != s.age)  
            return false; 
        if (name == null) {
            if (s.name != null) 
                return false; 
            } else if (!name.equals(s.name)) 
                return false; 
        return true;
    }

}