Object Oriented Programming using Java phần 2 pps

... . . . . . . . . 38 2. 1 .2 Data Abstraction . . . . . . . . . . . . . . . . . . . . . . . . . . 39 2. 1.3 Abstraction in Object- Oriented Programs . . . . . . . . . . . . 39 2. 2 Methods as an Abstraction ... . . . . . . . 40 2. 2.1 Black Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2. 2 .2 Preconditions and Postconditions . . . . . . . . . . . . . . . . . 41...

Ngày tải lên: 12/08/2014, 21:21

... from the po i n t ( x1 , y1 , z1 ) / / t o the po i n t ( x2 , y2 , z2 ) i n 3−dim ensi onal space . double x1, y1, z1; double x2, y2, z2; } / / end c l a s s Lin e . . . / / other members of the ... . . . . . . 121 6.4 .2 Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 6.4.3 Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 6.4.4 Sha...

Ngày tải lên: 12/08/2014, 21:21

... . . . . . . 21 3 10 .2. 1 Reading and Writing Files . . . . . . . . . . . . . . . . . . . . . 21 4 10 .2. 2 Files and Directories . . . . . . . . . . . . . . . . . . . . . . . . 21 7 10.3 Programming ... . . . . . . 21 0 10.1.4 Reading Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1 10.1.5 The Scanner Class . . . . . . . . . . . . . . . . . . . . . . . . . 21 2 10...

Ngày tải lên: 12/08/2014, 21:21

... Computer Science Module Object Oriented Programming COMP200 Adapted from Introduction to Programming Using Java Version 5.0, December 20 06 by David J. Eck http://math.hws.edu/javanotes/ Adapted by ... the object to whom the message is sent. If the receiver accepts 3 This discussion is based on Chapter 2 of An Introduction to Object- Oriented Programming by Tim- othy Bud...

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 ... the command line using the command java −jar”. For example: java −jar JarFileName.jar 2. 6 Creating Abstractions IN THIS SECTION, we look at some specific examples of object- or...

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 ... like this can be done in most programming languages. The cen- tral new idea in object- oriented programming the idea that really distinguishes it from traditional programming...

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 ... applet class only has to create an object of type HelloWorldPanel and use that object as its content pane: import javax.swing.JApplet; public class HelloWorldApplet2 extends J...

Ngày tải lên: 12/08/2014, 21:21

... text.) 1 42 g.drawImage(img, dest_x1, dest_y1, dest_x2, dest_y2, source_x1, source_y1, source_x2, source_y2, imageObserver); the integers source x1, source y1, source x2, and source y2 specify ... 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.∗; i...

Ngày tải lên: 12/08/2014, 21:21

... coll.containsAll(coll2)–returns a boolean value that is true if every object in coll2 is also in the coll. The parameter can be any collection. • coll.addAll(coll2)–adds all the objects in coll2 to coll. ... collection. • coll.retainAll(coll2)–removes every object from coll that does not occur in the collection coll2. It “retains” only the objects that do occur in coll2. coll2 can be any...

Ngày tải lên: 12/08/2014, 21:21

... what can be done about it. 9.1 .2 Java to the Rescue Part of the problem, according to the inventors of Java, can be traced to programming languages themselves. Java was designed to provide some ... 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.C...

Ngày tải lên: 12/08/2014, 21:21