我已经在这个社区的帮助下取代了从用户输入中删除数值,但是,我的代码只会在删除数字之前检索字母字符:
import java.util.Scanner;
public class Assignment2_A {
public static void main(String[] args) {
Scanner firstname = new Scanner(System.in);
String firstname1 = firstname.next();
firstname1 = firstname1.replaceAll("[^A-Z]","");
System.out.println(firstname1);
}
}
Run Code Online (Sandbox Code Playgroud)
例如,如果用户输入= S1234am,我只会回来:S.如何检索字符串中的剩余字符?