Eclipse Basically

Establish your first JAVA project within IDE Eclipse.

• Choose " File --> New --> Java project ".
• Fill " lu.ide.first " in Project name field.
• Make sure a option of " Create separate folders for sources and class file "is checked on Project layout.
• Press " Finish " button to create your first JAVA project.

New a Package

• Right click mouse on " src " folder.
• Choose New --> Package.
• And named " my.first ", click Finish.

New a Java class

• Right click mouse on just created Package that named " my.first ".
• Choose New --> Class.
• And fill " HellowJavaWorld " in Name field to create a new class.
• Don't forget check option " public static void main ( String [] args ) ", and press "Finish".

Reference Link: http://www.cc.ntu.edu.tw/chinese/epaper/0020/20120320_2003.html