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Graphics2D: create a visible line, read on

 
Ranch Hand
Posts: 86
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Netbeans IDE Chrome Java
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Hi Im creating an app where I need that a rectangle be visible all the time over the background. So I created this:

But in this example the rectangle is draw using white color. How can I do something like a xor that react with the background color to make this rectangle visible with any background?
Thanks in advance!
 
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Netbeans IDE Opera Java
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setXORMode(...)
 
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