问题:

I changed the color of my button. Now I want its original look and feel back. I want to change the color once to a color that i like. After that, I want the button to get its original look back.

How do I do that ?

Here is the code to change color -

JButton but = JButton("Press now to up vote"); // :)
but.setBackground(Color.orange); 
//code to remove this color and get the original look back ???

回答1:

Color oldColor = myButton.getBackground();
myButton.setBackground(Color.RED);
// ... do stuff
myButton.setBackground(oldColor);

回答2:

I want the button to get its original look back.

this code should be only button.setBackground(null);

Is there a way to find out the name/code of the old color

by default Colors has not a names, only safe Colors(blue, red, orange ....)
old color not JButton has arrays of Colors
UIManager returns javax.swing.plaf.ColorUIResource[r=xxx, g=xxx, b=xx], contains arrays of Colors and Insets