代码

package day9;

public class MemberCard {
    private String name; // 姓名
    private double balance; // 余额

    public MemberCard() {
    }

    public MemberCard(String name, double balance) {
        this.name = name;
        this.balance = balance;
    }

    public static void main(String[] args) {
        MemberCard card1 = new MemberCard("李雷",1000);

        MemberCard card2 = new MemberCard("lily", 2000);

        System.out.println("card1.name"+card1.name);// 李雷，引用card1指向另一个对象，对象中的name值是李雷

        System.out.println("card2.name"+card2.name);// lili，引用card2指向另一个对象，对象中的name值是lili



    }
}

图解