Java常用API(Scanner类）

 1 package cn.itcast;
 2 
 3 import java.util.ArrayList;
 4 import java.util.Arrays;
 5 import java.util.Scanner;
 6 
 7 public class Test {
 8     public static void main(String[] args) {
 9         Scanner scanner = new Scanner(System.in);
10         //输入整数
11         int i = scanner.nextInt();
12         System.out.println("输出整数："+i);
13         //输入字符串
14         String next = scanner.next();
15         System.out.println("输出字符串："+next);
16         //输入double
17         double v = scanner.nextDouble();
18         System.out.println("输出浮点数："+v);
19     }
20 }