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Who can tell me what the difference between GPL and LGPL is? For example, PJA(Pure java AWT) is GPL and JFreeChat is LGPL, I know they are all free software. but I've heard that they can't work together because of license(I have ever seen such topic from this forum), why(Am I wrong)?? I am so apprec...

I fixed the problem by jam06511's solution. So thank you very much jam06511. I share my experience here with you and hope that I could help you :) . I only wanted to create an image to show in HTML, I did not need ApplicationFrame at all. so I run the program org.jfree.chart.demo.BarChartDemo1 in Li...