這個課程的參考視訊和圖片來自youtube。

    主要學到的知識點有：

1. organize code into packages

Create a package if want to make the jar file reusable for other projects too. 

2. JavaDocs- document the code

In NetBeans Shortcut : /**  == generate JavaDoc for method

/**
 *  Print the message
 *  @param
 
 message Message need to print
 */
public void printMessage(String message)
{
        System.out.println(message);

}

In NetBeans Shortcut : Ctl + Space  == invodke JavaDoc for method

3. Test java methods with Junit

• Reduce the probability of semantic errors. 
• Source Packages, right click, New, other, Unit Tests, Test for Existing Class.
• In NetBeans Shortcut : Ctl + F6  == Run Unit Tests.