compile-single:
run-applet:
java.lang.IllegalArgumentException: verticalAlignment
        at javax.swing.AbstractButton.checkVerticalKey(AbstractButton.java:1001)
        at javax.swing.AbstractButton.setVerticalAlignment(AbstractButton.java:760)
        at Applet01.Applet01.makeButton(Applet01.java:26)
        at Applet01.Applet01.init(Applet01.java:16)
        at sun.applet.AppletPanel.run(AppletPanel.java:418)
        at java.lang.Thread.run(Thread.java:619)
BUILD SUCCESSFUL (total time: 3 seconds)