Scanner类 String类Scanner类Scanner(InputStream source) 构造一个新的 Scanner ,产生从指定输入流扫描的值。 录入整数的方法public class MyTest { public static void main(String[] args) { while (true) { System.out.println("请输入一个整数:"); Scanner sc = new Scanner(System.in); //Scanner对象...
publicstaticvoidmain(String[] args) { //创建Scanner类型的对象(注意,要导包) //System.in:标准的输入流,默认指向键盘 Scanner sc1 =newScanner(System.in); //接受整数 System.out.println("请输入一个整数"); //为了解决(避免)InputMismatchException异常,可以加一个判断 ...
input.next(); } num = input.nextInt(); System.out.println("输入的整型数字是:" + num);
String input = "1 fish 2 fish red fish blue fish"; Scanner s = new Scanner(input); s.findInLine("(\\d+) fish (\\d+) fish (\\w+) fish (\\w+)"); MatchResult result = s.match(); for (int i=1; i<=result.groupCount(); i++) System.out.println(result.group(i)); s....
publicclassText{publicstaticvoidmain(String[]args){Scanner input=newScanner(System.in);System.out.println("请输入一个字符串(中间能加空格或符号)");String a=input.nextLine();System.out.println("请输入一个字符串(中间不能加空格或符号)");String b=input.next();System.out.println("请输入一个整...
import java.util.*;//导入java.util下的所有类,import与c语言中的#include头文件有些类似 public class useage { public static void main(String[] args){ Scanner input=new Scanner(System.in); System.out.println("输入一个带有空格的串用nextLine()输入"); ...
String input = "1 fish 2 fish red fish blue fish"; Scanner s = new Scanner(input); s.findInLine("(\\d+) fish (\\d+) fish (\\w+) fish (\\w+)"); MatchResult result = s.match(); for (int i=1; i<=result.groupCount(); i++) System.out.println(result.group(i)); s....
import java.util.Scanner;/ (1)利用键盘录入，输入一个字符串 (2)统计该字符串中各个字符的数量 / public class InputString { public static void main(String[] args) { //获取键盘输入的字符串 Scanner sc=new Scanner(System.in);System.out.println("请输入一个字符串！");String st=sc....
This method may block while waiting for input. The scanner does not advance past any input.(当执行该方法时,会有堵塞现象,待用户输入时,遇到换行符则返回true) 4.实例 import java.util.Scanner; public class TestScanner1 { public static void main(String[] args) { Scanner scan = new Scanner(...
catch(InputMismatchException exp) { String t = scanner.next(); } } System.out.println("总通信费用:"+sum+"元"); } } 运行结果如下: 1 2 3 4 66.66 166.66 16.16 总通信费用:249.48元 C语言网提供由在职研发工程师或ACM蓝桥杯竞赛优秀选手录制的视频教程,并配有习题和答疑,点击了解: ...