在java中将带空格的char数组转换为String时如何删除该S​​tring中的空格？

Question

String output = new String(encryptText);
output = output.replaceAll("\\s", "");
return output;

replaceAll("\\\\s", ""); doesn't work

Answer 1

String output = new String(encryptText);
output = output.replaceAll(" ", "");
return output;

Answer 2

I was facing the same problem then I searched a lot and found that, it is not a space character but a null value which is transformed into string from character array. This resolved the issue for me -

output.replaceAll(String.valueOf((char) 0), "");

Answer 3

Your code works fine for me, see here

Anyway you can use the StringUtils.trimAllWhitespace from the spring framework :

output = StringUtils.trimAllWhitespace(output);

Answer 4

您可以使用非正则表达式替换来完成这项工作：

output = output.replace(" ", "");

Answer 5

Use String.replaceAll(" ","") or if you want to do it yourself without a lib call, use this.

        String encryptedString = "The quick brown fox ";
        char[] charArray = encryptedString.toCharArray();
        char [] copy = new char[charArray.length];
        int counter = 0;
        for (char c : charArray)
        {
            if(c != ' ')
            {
                copy[counter] = c;
                counter++;
            }
        }
        char[] result = Arrays.copyOf(copy, counter);
        System.out.println(new String(result));