摘要： 建立三个线程，A线程打印10次A，B线程打印10次B,C线程打印10次C，要求线程同时运行，交替打印10次ABC。这个问题用Object的wait()，notify()就可以很方便的解决。public class MyThreadPrinter2 implements Runnable { ... 阅读全文

摘要： 缺少X11显示设置Exception in thread "AWT-EventQueue-0" java.awt.HeadlessException: No X11 DISPLAY variable was set, but this program performed an operation... 阅读全文