Question

Java输入一个字符串，从左到右取出其中的数字组成一个整数，输出该整数减去123的值？

Answer 1

import java.util.regex.Matcher;import java.util.regex.Pattern;import java.util.Scanner; public class Test3 { public static void main(String[] args) { String str = new Scanner(System.in).nextLine(); String temp = ""; String regex = "\\w"; Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(str); while (matcher.find()) { temp = temp+matcher.group(); System.out.println(temp); } }}