Object Oriented Programming using Java phần 7 doc

... MouseAdapter to handle mouse events: import java. awt.Component; import java. awt.event.MouseEvent; import java. awt.event.MouseListener; import javax.swing.JFrame; 135 6 .7 Basic Layout COMPONENTS ARE THE ... HelloWorldGUI4 .java. This version is a variation of HelloWorldGUI2 .java that uses anonymous nested classes where the original program uses ordinary, named nested classes: import...

Ngày tải lên: 12/08/2014, 21:21

... the answer. 12 Object Oriented Programming using Java Notes for the Computer Science Module Object Oriented Programming COMP200 Adapted from Introduction to Programming Using Java Version 5.0, ... the Object- oriented Programming Concepts” section of the Java Tuto- rial by Sun MicroSystems. 16 Preface These notes are intended for a Second course in Object- Orient...

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... an object Wrapper Classes and Autoboxing Recall that there are two kinds of types in JAVA: primitive types and object types (Classes). In some object- oriented languages, everything is an object. ... java. awt, their full names are actually java. awt.Graphics, java. awt.Color and java. awt.Font. (I hope that by now you’ve gotten the hang of how this naming thing works in JAVA. )...

Ngày tải lên: 12/08/2014, 21:21

... site. Sun Microsystem’s documentation for the standard Java API was produced using javadoc. Javadoc documentation is prepared from special comments that are placed in the Java source code file. ... types of doc tag: If you want to create Web-page documentation, you need to run the javadoc tool. You can use javadoc in a command line interface similarly to the way that the javac and jav...

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... subclass of Object , a variable of type Object can refer to any object whatsoever, of any type. Java has several standard data structures that are designed to hold Object s, but since every object ... express the behavior of the objects. This is a powerful idea. However, something like this can be done in most programming languages. The cen- tral new idea in object- oriented...

Ngày tải lên: 12/08/2014, 21:21

... important ways in Java s standard packages. You’ll learn about some of these standard interfaces in the next few chapters. 95 import java. awt.∗; import java. awt.event.∗; import javax.swing.∗; public ... makes it possible to refer to a class such as java. awt.Color using its simple name, Color. All you have to do is say import java. awt.Color or import java. awt.∗. Uou still have to...

Ngày tải lên: 12/08/2014, 21:21

... RandomStringsPanel import java. awt.Color; import java. awt.Font; import java. awt.Graphics; import javax.swing.JPanel; 126 import java. awt.∗; import java. awt.event.∗; import javax.swing.∗; public class ... handling events in JAVA. A listener is an object that includes one or more event-handling methods. When an event is detected by another object, such as a button or menu, the lis...

Ngày tải lên: 12/08/2014, 21:21

... adding an object to a Set has no effect if that object was already in the set. • coll.contains (object) –returns a boolean value that is true if object is in the collection. Note that object is ... that can be stored in the list to objects of a specified type. Parameterized types extend Java s basic philosophy of type-safe programming to generic programming. 1 67 Since these meth...

Ngày tải lên: 12/08/2014, 21:21

... numbers.add( 17) or numbers.remove(42). You can’t literally add the primitive type value 17 to num- bers, but Java will automatically convert the 17 to the corresponding wrapper object, new Integer( 17) , ... values of type int range from −21 474 83648 to 21 474 836 47. What happens when the result of a computation lies outside this range? For example, what is 21 474 836 47 + 1? And wh...

Ngày tải lên: 12/08/2014, 21:21

... differences in path names between plat- forms, Java has the class java. io.File . An object belonging to this class represents a file. More precisely, an object of type File represents a file name rather ... new files and can write data to files. In Java, such input and output can be done using streams. Human-readable character data is read from a file using an object belonging to th...

Ngày tải lên: 12/08/2014, 21:21