java实例练习

1.不使用中间变量交换两个数

public class Exchange {



    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入一个整数：");

        Long num1 = scanner.nextLong();

        System.out.println("请输入一个整数：");

        Long num2 = scanner.nextLong();

        System.out.println("交换前num1:"+num1+"     交换前num2:"+num2 );

        num1 = num1^num2;

        num2 = num2^num1;

        num1 = num1^num2;

        System.out.println("交换后num1:"+num1+"     交换后num2:"+num2 );

    }

}

Exchange

2.利用三目运算符判断奇偶性

public class ParityCheck {



    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入一个整数：");

        Long num = scanner.nextLong();

        String s = (num%2==0)?"这个数是：偶数":"这个数是：奇数";

        System.out.println(s);

    }

}

ParityCheck