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Java_案例实例1.简单的人机交互

程序员文章站 2022-03-04 21:11:10
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运行效果截图:
Java_案例实例1.简单的人机交互
源代码:

package ch3_4;

import java.util.Scanner;

public class InteractionDemo {
	public static void main(String[] args) {
		int option;
		int i;
		float f;
		String s;
		System.out.println("----------------------------------------菜单----------------------------------------");
		System.out.println("1.输入整数\t\t2.输入小数\t\t3.输入字符串\t\t0.退出");
		System.out.println("------------------------------------------------------------------------------------");

		Scanner scanner = new Scanner(System.in);
		while (true) {
			System.out.println("选项:");
			option = scanner.nextInt();
			switch (option) {
			case 0:
				System.out.println("\t确定要退出吗(y/n)");
				s = scanner.next();
				if (s.equalsIgnoreCase("y")) {
					System.out.println("\t程序退出");
					break;
				} else {
					break;
				}
			case 1:
				System.out.println("\t请输入整数:");
				i = scanner.nextInt();
				System.out.println("\t你输入的是:" + i);
				break;
			case 2:
				System.out.println("\t请输入小数:");
				f = scanner.nextFloat();
				System.out.println("\t你输入的是:" + f);
			case 3:
				System.out.println("\t请输入字符串:");
				s = scanner.next();
				System.out.println("\t你输入的是:" + s);
			default:
				System.out.println("\t请输入其他正确选项");
				break;
			}
		}
	}
}

相关标签: # Java java