You could build something along this pseudo code:
for y=0 to 3 * ysize
for x=0 to 3 * xsize
if x even and y even
print +
if x even and y odd
print |
if x odd and y even
print --
if x odd and y odd
print space space
I don’t think a single while loop is matching your needs.
If you want to put chess figures on your board later on, you maybe are better off to save your checkerboard into a StringBuffer
and “render” it to screen 😉
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solved Creating a checkerboard in Java using a while loop [closed]