CODEWITHSUNDEEP
javaregexstring
A.P.S
A.P.S

Reputation: 1164

Reverse the string without changing white spaces in java

I'm working on reversing the string word by word and making sure that all the spaces, tabs and white spaces character etc. are not changed or removed. I have tried few solution using Java, but ending up with no good result. For example , to convert following string

 The rule       about++[]      the     input

        stream.

And get output like this without removing any white space character.

 ehT elur       tuoba++[]      eht     tupni

        maerts.

My code

String reverseString(String str) {
    StringBuilder temp = new StringBuilder();
    StringBuilder result = new StringBuilder();
    for (char ch : str.toCharArray()) {
        if (Character.isAlphabetic(ch)) {
            temp.append(ch);
        } else {
            result.append(temp.reverse()).append(ch);
            temp.delete(0, temp.length());
        }
    }
    result.append(temp);
    return result.toString();
}

I getting same result with one issue that word about++[], should be ][++tuoba0 where as it is showing like this tuoba++[]. Any way to resolve this issue?

Upvotes: 1

Views: 1759

Answers (2)

Pshemo
Pshemo

Reputation: 124265

Try changing 

if (Character.isAlphabetic(ch)) {

to 

if (!Character.isWhitespace(ch)) {

This way you will include all characters that are not whitespaces. Otherwise you will reverse only alphabetic characters which [ ] + are not.

Upvotes: 3

undefined
undefined

Reputation: 6462

+ and [] are not alphabetical, so you are treating them the same way you treat whitespace. Character.isWhitespace can help you solve your problem.

Upvotes: 2

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