It's interesting to see that the Toolkit package is under AWT. The only thing is you can't specify the frequency and time of the beep.
-hailstorm(鹏飞北溟);
2001-6-21(#108198@0)
the Factory Pattern is widely used in JDK.such as net and RMI
-youngmind(jordan);
2001-6-21(#108685@0)