Introductory Beginning

Basic ideas and concepts in nuclear physics by Kris L. G. Heyde

By Kris L. G. Heyde

This is often the second one variation of a longtime textbook on nuclear physics for senior undergraduates and postgraduate scholars. Professor Heyde has taken the chance to make the booklet extra helpful for college kids and academics through including an in depth set of difficulties. To convey the e-book brand new, he has revised a number of chapters and further a brand new bankruptcy on nuclei on the extremes of balance. The publication has developed from a path taught via the writer and offers a balanced account of either theoretical and experimental nuclear physics. it's also excellent for researchers in need of an obtainable creation to the topic. Emphasis is given to intensity of therapy instead of skimming over subject matters and there are lots of diagrams in addition to field inserts illustrating specific themes.

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Our paintComponent() method takes one argument named (somewhat tersely) g, which is of type Graphics. When the paintComponent() method is invoked, a Graphics object is assigned to g, which we use in the body of 35 36 the method. We'll say more about paintComponent() and the Graphics class in a moment. As for why, you'll see when we add all sorts of new features to our new component later on. 7 Inheritance Java classes are arranged in a parent-child hierarchy in which the parent and child are known as the superclass and subclass, respectively.

Or you may add a second button to this application later, and you don't want it to break something. To check this, we call the getSource() method of the ActionEvent object, e. We then use the == operator to make sure the event source matches theButton. In Java, == is a test for identity, not equality; it is true if the event source and theButton are the same object. The distinction between equality and identity is important. We would consider two String objects to be equal if they have the same characters in the same sequence.

The paintComponent() method is an important method of the JComponent class; we override it to implement the way our particular component displays itself on the screen. The default behavior of paintComponent() doesn't do any drawing at all. If we hadn't overridden it in our subclass, our component would simply have been invisible. Here, we're overriding paintComponent() to do something 36 37 only slightly more interesting. We don't override any of the other inherited members of JComponent because they provide basic functionality and reasonable defaults for this (trivial) example.

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