屏蔽字符串时保留空白

Question

I want to preserve the white space in the String while it is being masked. Below is the code I wrote for masking the string but it doesn't take into account that my some of my strings in my Arraylist have white space.

for (int i=0;i<secretWord.length();i++){
    System.out.print("*");
}

Answer 1

You can simply check whether a character is space or not!

for (int i=0;i<secretWord.length();i++){
    if(secretWord.charAt(i)!=' ')
    {
        System.out.print("*");
    }
    else
    {
        System.out.print(" ");
     }
}

Answer 2

System.out.print(secretWord.replaceAll("\\S","*"));

（在正则表达式中， \\S表示不是空格字符的单个字符。）

Answer 3

I think you are looking for a * for a character and space for a space to mask the string.
Do it like this:

for (int i=0 ; i<secretWord.length() ; i++){
        if(Character.isWhitespace(charAt(i))){
             System.out.print(charAt(i));
         }else{
             System.out.print("*");
          }
    }