[上]JAVA学习系列模块四第一章79.Scanner键盘录入_next&nextLine区别

[上]JAVA学习系列模块四第一章79.Scanner键盘录入_next&nextLine区别

视频

笔记

变量名.next():录入字符串 -> 遇到空格和回车就结束录入了
变量名.nextLine():录入字符串 -> 遇到回车就结束录入

public class Demo03Scanner {
 public static void main(String[] args) {
     Scanner sc = new Scanner(System.in);
     String data1 = sc.next();
     String data2 = sc.nextLine();
     System.out.println(data1);
     System.out.println(data2);
 }
}

Exception in thread "main" java.util.InputMismatchException -> 输入类型不匹配异常
    at java.base/java.util.Scanner.throwFor(Scanner.java:939)
    at java.base/java.util.Scanner.next(Scanner.java:1594)
    at java.base/java.util.Scanner.nextInt(Scanner.java:2258)
    at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
    at com.atguigu.a_scanner.Demo04Scanner.main(Demo04Scanner.java:8)

原因:录入的数据和要求的数据类型不一致