java - Getting duplicated data in tests -

when run following test case:

@test(timeout=1000) public void shape_displaychar2_rot(){     string layout =       "b....\n"+       ".....\n"+       "....b\n"+       "";     string expect =        "shape z\n"+       "height: 5; width: 3; rotation: cw90\n"+       "..z\n"+       "...\n"+       "...\n"+       "...\n"+       "z..\n"+       "";     char newdc = 'z';     char dc = getdisplaychar(layout);     shape shape = fitit.makeshape(layout,dc);     shape.setdisplaychar(newdc);     shape.rotatecw();     assertequals(newdc, shape.getdisplaychar());     string actual = shape.tostring();     assertequals(expect,actual);   } 

i following failure:

expected: shape z height: 5; width: 3; rotation: cw90 ..z ... ... ... z.. 

my actual code's result:

actual: shape z height: 5; width: 3; rotation: cw90 b.... ..... ....b ..z ... ... ... z.. 

the string layout above test case rotated rotatecw() 90 degrees clockwise , changes character. question why getting:

b....    <<<<----- why getting ? .....    <<<<----- why getting ? ....b    <<<<----- why getting ? ..z ... ... ... z.. 

instead of just:

    ..z     ...     ...     ...     z.. 

code:

import java.util.*;

public class createshape implements shape {      private string layout;     private int height;     private int width;     private char dc;     private rotation initialpos;     private char[][] shape;     //private char[][] rotatedshape = new char[height][width];// = new char[shape.length][shape[0].length];      public createshape(int height, int width, char dc, char[][] charlayout, string layout) {         this.height = height;         this.width = width;         this.dc = dc;         this.shape = charlayout;         this.layout = layout;         initialpos = rotation.cw0;         //nextpos = rotation.cw0;     }      public rotation getrotation() {         return initialpos;     }      public int getheight() {         return this.height;     }      public int getwidth() {         return this.width;     }      public char getdisplaychar() {         return dc;     }      public void setdisplaychar(char c) {         this.dc = c;         (int = 0; < shape.length; i++) {             (int j = 0; j < shape[0].length; j++) {                 //if(shape[i][j] == '.')                 //this.newlayout += shape[i][j];                 if (shape[i][j] != '.') {                     shape[i][j] = c;                 }             }             //this.newlayout+="\n";         }       }      public void rotatecw() {          initialpos = initialpos.next();         int w = shape.length;         int h = shape[0].length;          char[][] swapped = new char[h][w];         (int = 0; < h; i++) {             (int j = 0; j < w; j++) {                 swapped[i][j] = shape[w - j - 1][i];                 layout += swapped[i][j];             }             layout += "\n";         }         height = swapped.length;         width = swapped[0].length;      }      public boolean isfilledat(int row, int col) {         if (row < 0 || row >= height || col < 0 || col >= width) {             throw new fititexception("oops! out of bounds!");         } else {             (int r = 0; r <= height; r++) {                 (int c = 0; c <= width; c++) {                     if (shape[row][col] == dc) {                         return true;                     }                  }             }         }         return false;     }      public string tostring() {         return "shape " + this.dc + "\n" +                 "height: " + this.height + ";" + " width: " + this.width + "; " + getrotation().tostring() + "\n" +                 this.layout;     } } 

class fitit

public class fitit {     public static shape makeshape(string layout, char displaychar) {         shape result;         int height = 0;         int width = 0;           scanner data = new scanner(layout);          while (data.hasnextline()) {             string line = data.nextline();             width = line.length();             height++;         }         char[][] charlayout = new char[height][width];         scanner data2 = new scanner(layout);         (int = 0; < height; i++) {             string line = data2.nextline();             (int j = 0; j < width; j++) {                  if (line.charat(j) != '.') {                     charlayout[i][j] = displaychar;                 }                 if (line.charat(j) == '.') {                     charlayout[i][j] = line.charat(j);                 }             }         }         data2.close();         result = new createshape(height, width, displaychar, charlayout, layout);         return result;     } 

in rotatecw() method, forget clear layout. can add layout = "" before loop , have try.