$Ts!47&*s456 a23* +B9k
*47*456*23*9*
1 import java.util.*; 2 3 public class Main { 4 public static void main(String[] args) { 5 Scanner sc = new Scanner(System.in); 6 String str1 = sc.nextLine(); 7 char[] str2 = new char[81]; // 定義用於儲存變形後字符串的字符數組 8 int j = 0; 9 int flag = 1; // 設置變量,標識是否已經輸出過數字 10 for (int i = 0; i < str1.length(); i++) { 11 char ch = str1.charAt(i); 12 if (Character.isDigit(ch)){ // 調用isDigit方法,識別整數 13 flag = 1; 14 str2[j++] = ch; 15 } 16 else if (flag == 1){ 17 str2[j++] = '*'; 18 flag = 0; 19 } 20 } 21 for (int i = 0; i < j; i++){ 22 System.out.printf("%c", str2[i]); 23 } 24 } 25 }