class StringSortWithSpace { public static String StringSortWithSpace(String str){ char[] ch = str.toCharArray(); System.out.println(String.valueOf(ch)); char[] tempArray = new char[ch.length]; for(int i = 0 ; i < ch.length; i++){ if(ch[i] ==' '){ tempArray[i] =' '; } } int j = tempArray.length - 1; for(int i = 0 ; i < ch.length ; i++){ if(ch[i] !=' '){ if(tempArray[j] ==' '){ j--; } tempArray[j] = ch[i]; j--; } } System.out.println(String.valueOf(tempArray)); return String.valueOf(tempArray); } public static void main(String[] args) { String str = "This is a String"; System.out.println(StringSortWithSpace(str)); } }