TestGuiAvailable.java 文件源码

public static void main(String[] args) throws InterruptedException {
    if (Beans.isGuiAvailable() == GraphicsEnvironment.isHeadless()) {
        throw new Error("unexpected GuiAvailable property");
    }
    Beans.setGuiAvailable(!Beans.isGuiAvailable());
    ThreadGroup group = new ThreadGroup("$$$");
    Thread thread = new Thread(group, new TestGuiAvailable());
    thread.start();
    thread.join();
}