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package iris;

import java.util.Arrays;

import java.util.List;

public class reverseText {

/**

* Asked in IRIS Round -2 . Reverse a string keeping the spaces intact

* @param args

*/

public static void main(String[] args) {

String input = "Welcome to Java";

System.out.println(reverseStringWithSpaces(input));

}

public static String reverseStringWithSpaces(String str) {

char[] originalStrChars = str.toCharArray();

char[] reversedStrChars = new char[str.length()];

// Mark spaces in reversed string

for (int i = 0; i < str.length(); i++) {

if (originalStrChars[i] == ' ') {

reversedStrChars[i] = ' ';

}

}

// Fill characters in reversed string

int j = str.length() - 1;

for (int i = 0; i < str.length(); i++) {

// Skip if the current character is space

if (originalStrChars[i] != ' ') {

// Skip spaces in reversed string

while (reversedStrChars[j] == ' ') {

j--;

}

// Fill character

reversedStrChars[j] = originalStrChars[i];

j--;

}

}

return new String(reversedStrChars);

}

}