Java By Example PHẦN 2 pdf

... its own class by overriding the paint( ) method in order to display text in the window. Figure 23 .2 shows FrameApplet2 running under Appletviewer. Figure 23 .2 : This is FrameApplet2 running under ... running under Appletviewer. Listing 23 .2 FrameApplet2 .java: Creating a Frame-Window Class. import java. awt.*; import java. applet.*; public class FrameApplet2 extends Applet { Cus...

Ngày tải lên: 22/07/2014, 16:21

... program. Table 5 .2 Summary of Java& apos;s Data Types. Type Value byte - 128 to 127 short - 32, 768 to 32, 767 int -2, 147,483,648 to 2, 147,483,647 long Huge float -3.4 028 23e38 to 3.4 028 23e38 double ... you'll see in the following example. Example: Multiplication and Data Types Try to determine the result of the following calculation: byte product = (byte) (20 * 20 ); th...

Ngày tải lên: 12/08/2014, 19:21

... SQL Server 20 00 Programming by Example 84 name crdate sysobjects 20 00-04-18 01:51:58.910 sysindexes 20 00-04-18 01:51:58.910 syscolumns 20 00-04-18 01:51:58.910 systypes 20 00-04-18 ... 2. 24 Using Variables in Transact-SQL DECLARE @firstname VARCHAR (20 ) SET @firstname = 'Maria' SELECT @firstname GO Microsoft SQL Server 20 00 Programming b...

Ngày tải lên: 08/08/2014, 22:20

... num2 = 10; } else { num = 2; num2 = 20 ; } In Listing 9.4, if choice equals 1, Java sets num to 1 and num2 to 10. If choice is any other value, Java executes the else portion, setting num to 2 ... ((num1 != 5) || (num2 == 10)) && !(num1 == 5)? Show each step of the evaluation. if (choice == 1) { num = 1; num2 = 10; } else if (choice == 2) { num = 2; num2 = 20 ;...

Ngày tải lên: 12/08/2014, 19:21

... width =20 0 height =20 0 name="Applet19"> Figure 12. 1 : This is the Applet13 applet running under Appletviewer. Listing 12. 1 Applet13 .java: Printing Instructions in an Applet. import java. awt.*; import ... Applet16 .java: Using Variables to Track Scores. import java. awt.*; import java. applet.*; public class Applet16 extends Applet { TextField textField1, textField2,...

Ngày tải lên: 12/08/2014, 19:21

... Listing 19 .2. Listing 19 .2 LST19 _2. TXT: Creating Exclusive Checkboxes. checkbox1 = new Checkbox("The Adventures of Javaman", group, true); checkbox2 = new Checkbox(" ;Java by Example& quot;, ... selected", 20 , 120 + height); else g.drawString("Option2 not selected", 20 , 120 + height); checked = checkbox3.getState(); if (checked) g.drawString(...

Ngày tải lên: 12/08/2014, 19:21

... num2 = 10; } else { num = 2; num2 = 20 ; } In Listing 9.4, if choice equals 1, Java sets num to 1 and num2 to 10. If choice is any other value, Java executes the else portion, setting num to 2 ... == 1) { num = 1; num2 = 10; } else if (choice == 2) { num = 2; num2 = 20 ; } http://www.ngohaianh.info Chapter 16 Drawing Graphics CONTENTS The Applet's Canvas● Example: Us...

Ngày tải lên: 22/07/2014, 16:21

... Chapter 16● Chapter 17● Chapter 18● Chapter 19● Chapter 20 ● Chapter 21 ● Chapter 22 ● Chapter 23 ● Chapter 24 ● Chapter 25 ● Chapter 26 ● http://www.ngohaianh.info Table 36.6 Commonly Used Classes ... source is a string. Example: Reading a File There are many ways to read files using Java& apos;s I/O classes. The most basic, however, is to read a file byte -by- byte. Sup...

Ngày tải lên: 22/07/2014, 16:21

... both the MyThread .java and ThreadApplet2 .java files in your CLASSES folder. Java will then compile both files when you compile ThreadApplet2 .java. Listing 31.5 ThreadApplet2 .JAVA: An Applet That ... the original Java- compatible Web browser. java This is the Java interpreter, which runs applets and applications by reading and interpreting byte-code .CLASS files. javac This is...

Ngày tải lên: 22/07/2014, 16:21

... are way cooler. Listing 28 .5 ConnectApplet2 .java: A "Favorite URLs" Applet. import java. awt.*; import java. applet.*; import java. net.*; public class ConnectApplet2 extends Applet { boolean ... and AppletContext objects to link to that URL. Listing 28 .2 shows how you might accomplish this feat of Internet prestidigitation: Listing 28 .2 LST28 _2. TXT: Linking to an URL...

Ngày tải lên: 22/07/2014, 16:21