Java购票系统示例 - 基于年龄计算票价

public class BuyTicket {
    public static void main(String[] args) {
        System.out.println('姓名\t年龄\t票价');
        System.out.println('-------------------');
        Buy buy = new Buy('李明', 20);
        buy.buyTicket();
    }
}

class Buy {
    int age;
    String name;

    public Buy(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public void buyTicket() {
        if (age >= 18) {
            System.out.println(name + '\t' + age + '\t' + 40);
        } else {
            System.out.println(name + '\t' + age + '\t' + 20);
        }
    }
}