java - For loop not running in method -

for reason loop not running , can't seem figure out why. keeps skipping straight return statement. thanks.

 public char[] palindromecheck(char[] original) {      char[] reversed = new char[original.length];      (int = original.length; <0; i--) {         switch (original[i]){             case 'a':                 original[i] = character.tolowercase(original[i]);                 break;             case 'e':                 original[i] = character.tolowercase(original[i]);                 break;             case 'i':                 original[i] = character.tolowercase(original[i]);                 break;             case 'o':                 original[i] = character.tolowercase(original[i]);                 break;             case 'u':                 original[i] = character.tolowercase(original[i]);                 break;             default:                 original[i] = character.touppercase(original[i]);                 break;         }         reversed[i] = original[i];     }      return reversed; } 

for (int = original.length; <0; i--) 

the condition false since length >= 0. since you're indexing array, want loop length-1 0 like

for (int = original.length - 1; >= 0; i--)