$ java -jar Minecraft.jar
Exception in thread "main" java.awt.HeadlessException
        at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
        at java.awt.Window.<init>(Window.java:535)
        at java.awt.Frame.<init>(Frame.java:420)
        at javax.swing.JFrame.<init>(JFrame.java:218)
        at net.minecraft.bootstrap.Bootstrap.<init>(Bootstrap.java:45)
        at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:378)