问题
I am working with an application that is experiencing painting issues on some users computers when the mouse passes over the tabs in a JTabbedPane. They also occasionally have similar issues on other interactive components like JButtons. I have only ever seen this error occur on mouse overs.
The application is being run with 1.6.0_20 and I have already tried the flag recommended in update 10 in case it was an issue with D3D (-Dsun.java2d.d3d=false).
Since I am a new user I cannot post a picture to illustrate this error. The best example I can think of is using Windows paint eraser on an image would create something similar to what I am seeing.
I appreciate any help you can provide.
回答1:
Without an sscce that exhibits the problem you describe, it's hard to be specific, but this reminds me of the rendering artifact associated with setting the opaque property to true without completely rendering the area defined by a component's bounds. In particular, if you override paintComponent() and "do not honor the opaque property, you will likely see visual artifacts." Finally, the default opacity setting of some components varies by Look & Feel, so the effect may be platform dependent.
来源：https://stackoverflow.com/questions/7731712/jtabbedpane-mouseover-paint-issue