1.add some test program within SwingDemo package
	BorderTest.java    
	RadioButtonTest.jav
	CheckBoxTest.java  
	TextAreaTest.java  
	FormatTest.java    
	TextTest.java      
	Calculator.java    
	EventSourceTest.jav
	MulticastTest.java 
	ActionTest.java    
	ButtonEventTest.jav
	MouseTest.java     
	SampleSketch.java  
	MenuTest.java      
	SpinnerTest.java   
	SliderTest.java    
	ComboBoxTest.java  
2.change some function at functionDemo package
	add WriteDateToFile.java
	change GetFileSize.java