Object Oriented Programming using Java phần 10 pps

... e except io n } 10. 3 Programming With Files IN THIS SECTION, we look at several programming examples that work with files, using the techniques that were introduced previously. 10. 3.1 Copying a ... 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 the clas...

Ngày tải lên: 12/08/2014, 21:21

... 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

... 100 5.4 Enums as Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 THIS SECTION simply pulls together a few more miscellaneous features of object oriented programming in Java. ... ); window.setContentPane(content); window.setSize(250 ,100 ); window.setLocation (100 ,100 ); window.setVisible(true); } } 6.2.1 JFrame and JPanel In a JAVA GUI program, each GUI com...

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...

Ngày tải lên: 12/08/2014, 21:21

... 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. Recall that one type of Java comment begins ... 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 java commands are used. Javadoc can also be a...

Ngày tải lên: 12/08/2014, 21:21

... 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

... 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

... 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 java. awt.∗; import java. awt.event.∗; import ... make any changes at all to that class: import java. awt.Component; import java. awt.event.MouseEvent; import java. awt.event.MouseListener; import javax.swing...

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 ... study investigate the object- oriented concepts of encapsulation, inheritance, and polymor- phism. The game is inspired by Timothy Budd’s version in his book AN INTRODUC- TION TO OBJECT...

Ngày tải lên: 12/08/2014, 21:21

... size(), isEmpty(), remove (Object) , add(T), and clear(). The add(T) method adds the object at the end of the list. The remove (Object) method involves first finding the object, which is not very ... order for arbitrary objects. Before objects can be sorted, some method must be defined for comparing them. Objects that are meant to be compared should implement the interface java. lang.Compara...

Ngày tải lên: 12/08/2014, 21:21