java - Rotating a String or char clockwise by 90 degrees -

folks, i'm having hard time rotating shape clockwise 90 degrees. i'm having troubles completing it. if there shape:

.t. ttt 

the method rotateby90() rotates above shape 90 degrees clockwise, it'll following output:

t. tt t. 

the shapes of string type. here have , im pretty sure im doing wrong. method can done using either char[][], or char[], or string[], or string[][]. issue rotateby90() void method. smb please me rotation algorithm? in advance!

import java.util.*;  public class createshape {      private int height;     private int width;     private char dc;     private rotation initialpos;     private rotation nextpos;     private char[][] shape = new char[height][width];      string[] shapelayout = new string[height];     string[] rotatedarray;  public createshape(int height, int width, char dc)     {         this.height = height;         this.width = width;         this.dc = dc;         initialpos = rotation.cw0;     }      public void rotateby90()      {         nextpos = initialpos.next();          string newlayout = "";          int count = 0;         string[] newmatrixcolumns= shape.split("\n");         while (count < shape.split("\n")[0].length()) {             (int = newmatrixcolumns.length - 1; > -1; i--) {                 newlayout += newmatrixcolumns[i].charat(count);             }              newlayout = newlayout + "\n";             count++;         }      } 

i don't quite approach , difficulties lie. don't why have many unused fields. may want set width , height fields final, shouldn't change in case.

personally think far easiest use char[][]. have iterate initial char[][] , place element @ appropriate place in new char[][]. in method you'd have like

public void rotateby90()  {     // bla bla     char[][] tempshape = new char[width][height];      for(int j = 0; j < width; j++) {         for(int = 0; < height; i++) {             tempshape[...][...] = myshape[i][j]; //i'll leave exercise         }     }      myshape = tempshape; } 

word of caution: careful strings. many string operations involve creating other strings (split, substring, concatenation etc). if them in long loop, may run out of memory quickly.