在控制台上输入字符串，将其中的数字输出到控制台上

public class TestString {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        char[] chars = str.toCharArray();
        int length = chars.length;
        System.out.println("length:"+length);
        if(length>0){
            System.out.println("该字符串"+str+"中的数字是:");
            for (int i = 0; i <chars.length; i++) {
                char aChar = chars[i];
                if(aChar!=' '){
                    if (Character.isDigit(aChar)){
                        System.out.print(aChar+",");
                    }
                }
            }
        }
    }
}