java - Last square of 8x8 grid not drawn, using two nested FOR loops -

i'm having trouble understanding why code isn't working. should display checkerboard grid 8x8, but last square doesn't drawn! idea why?

i searched see if had been asked before, , didn't find anything. in advance!

code:

/* * file:checkerboard.java * ---------------------- */  import acm.graphics.*; import acm.program.*;  public class checkerboard extends graphicsprogram { int row, column, x, y;      public void run() {          // checkerboard         (row = 0; row < 8; row++) {             (column = 0; column < 8; column++) {                 // x, y, x width, y width                 add(new grect(x, y, 50, 50));                 x = column * 50;                 y = row * 50;             }         }     } } 

btw: book i'm reading asks use 2 nested loops ("the art , science of java", chapter 4, exercise 11, cs-106a)

you need set x , y before drawing rectangle. otherwise, last rectangle not going display:

for (row = 0; row < 8; row++) {     (column = 0; column < 8; column++) {         x = column * 50;         y = row * 50;         // x, y, x width, y width         add(new grect(x, y, 50, 50));     } } 

better yet, drop x , y altogether, , use calculations directly:

for (row = 0; row < 8; row++) {     (column = 0; column < 8; column++) {         add(new grect(column * 50, row * 50, 50, 50));     } }