Object Oriented Programming using Java phần 5 ppsx
Object Oriented Programming using Java phần 5 ppsx
... 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 ... it.
5. 3.1 Static Import
The import directive 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...
Object Oriented Programming using Java phần 1 pot
... 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, December ... 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 Obje...
Object Oriented Programming using Java phần 2 pps
... 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. ... only hold objects. If you want to add a primitive type value to a
collection, it has to be put into a wrapper object first.)
In JAVA 5. 0, wrapper classes have become easier to use....
Object Oriented Programming using Java phần 3 ppt
... 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 ... extent on the version of JAVA that you are using,
but in the standard JAVA 5. 0, they are stored in jar files in a subdirectory of the
main JAVA installation directory. A jar (...
Object Oriented Programming using Java phần 4 potx
... 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 ... same object.
85
• Sequence Diagrams show objects and a sequence of method calls they make to
other objects.
• Collaboration Diagrams show objects and their relationship, putting...
Object Oriented Programming using Java phần 6 pdf
... 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...
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;
1 35
6.7 Basic Layout
COMPONENTS ARE THE ... 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.JFrame;
133
even if...
Object Oriented Programming using Java phần 8 pdf
... 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 ... problem, Java 5. 0 introduced parameterized types. ArrayList
is an example: Instead of using the plain “ArrayList” type, it is possible to use
ArrayList<BaseType>, where BaseType...
Object Oriented Programming using Java phần 9 potx
... 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...
Object Oriented Programming using Java phần 10 pps
... 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...
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