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JFrame, JTextArea, JOptionPain, JApplet, clarification?

 
Travis Gn
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1. What are the differences between JFrame, JTextArea, JOptionPain, JApplet?

2.I am working with a JFrame and need to print a line on the viewable area, do I just need to add a container? If so what is the syntax? any info will help.
 
Ernest Friedman-Hill
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Chrome Eclipse IDE Mac OS X
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Please don't post the same question to multiple forums.

Followups to the copy over in the Beginner forum, please.
 
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