How to learn "JAVA core technology ," Volume 1, Chapter VII , it seems that memory is more than understanding

Chapter VII is "Graphic Design" , feel better framework needs to remember, rather than understanding. For example ,

EventQueue.invokeLater
  			 (
  					 new Runnable()
  					 {
  					 		public void run()
  					 		{
  					 				A a = new A();
  					 				a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);	
  					 				a.setLocationByPlatform(true);
  					 				a.setVisible(true);
  					 		}	
  					 }
  			 );

like there are a lot , I feel there is no logic at all, is to remember the same. There are other multi- functions to death . How did you learn this knowledge to you?
As a beginner , you do not skip this part of the knowledge ?
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java in a simple GUI can be used to learn on the line , very few people actually work with this bad luck stuff. . .
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Will the chapters in this book which should focus on learning and practical application of some more ? I can not tell the primary and secondary . This book can be found to the Internet , you can pointing in more detail about it?   In addition to GUI graphical interface, is very important , especially IO, threading , collections , inheritance , encapsulation is the most important of these , I suggest you go online to download the video and see, not learn how to read things , see with instructional videos knock code, quickly learned . . .
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GUI java is not the focus , nothing more difficult to understand , and hands like ~
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is remember, too many features function .  
Then do not remember , the probability of use is too small , in my humble way . Oh, you can look rough , it is hard to understand a lot of things , so you have some development experience , the depth will be back in a great harvest
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GUI look simple , personal recommendations do not need back , you can understand the amount of
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Will the chapters in this book which should focus on learning and practical application of some more ? I can not tell the primary and secondary . This book can be found to the Internet , you can pointing in more detail about it?
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is remember, too many features function .
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Thank you , understand, I'm ready to skip these chapters , look at a collection of generic programming and multithreading .