泛型类01

课堂编程实践

创建学生类的泛型类, 包含姓名、成绩、出生日期属性。并通过传入类型实参建立学生类的多个实例。

import java.util.Date;
class Student {
//类型形参变量作用于属性的类型
    private T1 name;
    private T2 age;
    private T3 birthDay;
//类型形参变量作用于构造方法的参数类型
    public Student(T1 name,T2 age,T3 birthDay) {
        this. name=name;
        this. age=age;
        this. birthDay=birthDay;
    }
//类型形参变量作用于方法的参数类型
    public void setName(T1 name) {
        this. name=name;
    }
    public void setAge(T2 age) {
        this. age=age;
    }
    public void setBirthDay(T3 birthDay) {
        this. birthDay=birthDay;
    }
//类型形参变量作用于方法的返回值类型
    public T1 getName() {
        return name;
    }
    public T2 getAge() {
        return age;
    }
    public T3 getBirthDay() {
        return birthDay;
    }
}
public class Example {
    public static void main(String[] args) {
        Student stu=new Student("张三",85,"2001.06.30");
   System.out.println(stu.getName()+"..."+stu.getName().getClass());
   Date date =new Date();
   Student stu2=new Student("张三",85,date.getTime()-100000000);
        System.out.println(stu2.getBirthDay()+"..."+stu2.getBirthDay().getClass());
    }
}

运行结果：