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Lập trình web với PHP - p38

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Chương 9 : ĐIỀU KHIỂN VÀ TRÁNH NHỮNG LỖI. PHP hỗ trợ đầy đủ tính năng lập trình giao diện API (Applications Programming Interface) có thể tìm ra lỗi và khắc phục những lỗi ấy. Apache có một thư mục Lỗi tài liệu, bạn có thể định cấu hình trong file httpd.conf để tạo ra những trang thông báo lỗi...

Lập trình web với PHP - p39

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PHP hỗ trợ đầy đủ tính năng lập trình giao diện API (Applications Programming Interface) có thể tìm ra lỗi và khắc phục những lỗi ấy. Apache có một thư mục Lỗi tài liệu, bạn có thể định cấu hình trong file httpd.conf để tạo ra những trang thông báo lỗi với PHP, vì thế người thăm trang web không...

Lập trình web với PHP - p40

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Apache có một thư mục Lỗi tài liệu, bạn có thể định cấu hình trong file httpd.conf để tạo ra những trang thông báo lỗi với PHP, vì thế người thăm trang web không thấy buồn chán. PHP tạo ra trang web thông báo lỗi thân thiện cho người dùng.. Không giống những trang thông báo lỗi như PHP, trang...

Giáo trình PHP

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9 Kiểu dữ liệu và biến 9 Khai báo và sử dụng hằng.. 9 Dữ liệu mảng. 9 Chuyển đổi kiểu dữ liệu 1. Khi khai báo biến thì không có kiễu dữ liệu. Sử dụng dấu. Sử dụng. KHAI BÁO BIẾN. KIỂU DỮ LIỆU. Array Mảng với nhiều kiểu dữ liệu 3.1. Thay đổi kiểu dữ liệu. Ngoài ra,...

Java Programming for absolute beginner- P1

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JavaProgAbsBeg-00Fnt.qxd AM Page i. To check for updates or corrections relevant to this book and/or CD-ROM visit our updates page on the Web at http://www.prima-tech.com/support.. To comment on this book or any other PRIMA TECH title, visit our reader response page on the Web at http://www.prima-tech.com/comments.. For individual orders, turn to the back of this book for more information.. JavaProgAbsBeg-00Fnt.qxd...

Java Programming for absolute beginner- P2

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The examples are fun to program, and at the same time, demonstrate important programming skills that you can use to write different types of programs.. I do not assume that you have any programming experience. If you do have some programming experience, but have little to no experience with Java, you will also benefit from reading this book and learning...

Java Programming for absolute beginner- P3

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If you just want to make a note about a par- ticular line of code, you usually precede that line of code with a single-line com- ment as shown here:. //The following line of code prints a message using standard output System.out.println("Hello, World!");. After the double slashes, you can type anything you want to on that single line and the...

Java Programming for absolute beginner- P4

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//The addition happens first because of the parentheses //Next the division and then the subtraction.. System.out.println . Any- time the user runs the application, he or she can enter different input, causing the program to have the capability to have different output each time it is run.. What follows is a listing of the HelloUser application:. reader = new BufferedReader(new...

Java Programming for absolute beginner- P5

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by the Math.random(). The java.util.Random Class. Uses java.util.Random to generate random numbers. import java.util.Random;. System.out.println(“Random Integers:”);. System.out.println(rand.nextInt. System.out.println(“\nRandom Integers between 0 and 10:”);. System.out.println(rand.nextInt(iLimit. System.out.println(“\nRandom Floats:”);. System.out.println(rand.nextFloat. System.out.println(“\nRandom Booleans:”);. System.out.println(rand.nextBoolean. The output of the NumberMakerUtil program is displayed in Figure 3.3.. This is the output of the NumberMakerUtil. This makes rand an instance of the Random class and you use...

Java Programming for absolute beginner- P6

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System.out.println(name. This is several runs of the HighOrLowTemp. The ManyTemps program demonstrates the use of the nested if-else structure. It prints a different message depending on the range of the randomly generated temperature.. System.out.println(“The temperature is. System.out.println(“It’s DANGEROUSLY FREEZING! Stay home.”);. System.out.println(“It’s extremely cold! Bundle up tight.”);. System.out.println(“It’s cold enough to snow.”);. System.out.println(“You should bring a coat.”);. System.out.println(“It’s nice and...

Java Programming for absolute beginner- P7

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System.out.print(i. System.out.println(“y and x both = 0”);. System.out.println(“The expression y = x. System.out.println(“a and b both = 0”);. System.out.println(“The expression b = ++a. Note that the variable y is assigned the value 0 , which is the value of x before it is incremented because that is the value of the postfix increment expression. On the other hand, the value...

Java Programming for absolute beginner- P9

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System.out.println(“Your number is. reader = new BufferedReader(new InputStreamReader(System.in));. System.out.println(“I’m thinking of a number between 1 and 100.”);. System.out.println(“Can you guess what it is?”);. System.out.print(“Your guess:. System.out.println(“That is not a valid Integer!”);. System.out.println(“You guessed my number in. System.out.println(“My number is HIGHER.”);. System.out.println(“My number is LOWER.”);. System.out.println(“Remember, my number is between. You set it out of the range of possible numbers, so...

Java Programming for absolute beginner- P10

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System.out.println(tt.x);. You can see that it does the same thing as in the previous example. It adds up two vari- ables’ values and stores the result in the first variable.. It’s the same concept here, you tell the method where your object is and then it goes and operates on it, and when it’s done, your object might have changed.....

Java Programming for absolute beginner- P11

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First you used what you learned about the super keyword to call Automobile ’s version of the method, and then you simply appended the trailer value.. Back to the BlackJack Game. You also learn about the java.util.Vector class, which will help in creating the final game. To do this, you import the java.util.Random class. import java.util.Random;. It is initialized to...

Java Programming for absolute beginner- P12

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Table 6.2 summarizes some of the Frame class’s methods.. import java.awt.Frame;. Then you declare the UselessFrame class and indicate that it is a subclass of the Frame class:. Image getIconImage() Returns this Frame ’s icon Image object.. MenuBar getMenuBar() Returns this Frame ’s MenuBar . String getTitle() Returns this Frame ’s String title.. setIconImage(Image) Sets the Frame ’s icon image...

Java Programming for absolute beginner- P13

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l4.add(“Not Enabled”);. l4.add(“Nope”);. frame.add(l1);. frame.add(l2);. frame.add(l3);. frame.add(l4);. frame.add(cb1);. frame.add(cb2);. frame.add(cb3);. frame.add(cb4);. frame.add(cb5);. frame.add(cb6);. frame.add(cb7);. frame.add(cb8);. frame.add(c1);. frame.add(c2);. frame.add(c3);. frame.add(c4);. myMenu.add(myItem);. myBar.add(myMenu);. fileMenu.add(fm_open);. fileMenu.add(fm_save);. fileMenu.add(fm_saveAs);. fileMenu.add(fm_exit);. editMenu.add(em_options);. menuBar.add(editMenu);. popMenu.add(pm_copy);. popMenu.add(pm_paste);. popMenu.add(pm_delete);. frame.add(popMenu);. myPanel.add(someComponent);. p1.add(new Label(“URL. p1.add(new TextField(25));. p1.add(new Button(“Go”));. p2.add(new Label(“Pick one:”));. p2.add(new Checkbox(“Drums”, false, cbg));. p2.add(new Button(“OK”));. frame.add(p1);. frame.add(p2);. ctf.add(sbt1);. ctf.add(sbt2);. nPanel.add(new Label(“Nouns:”));. nPanel.add(n1). nPanel.add(n2). nPanel.add(n3);. aPanel.add(new Label(“Adjectives:”));. aPanel.add(a1). aPanel.add(a2)....

Java Programming for absolute beginner- P14

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The buildStory() method itself works by creating an array of String s that rep- resent segments of the story that break where words should be inserted. Go back and try playing around with some of the methods that appeared in tables of this chapter, but never actually made it into any of the programs to see how their effects look.....

Java Programming for absolute beginner- P15

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which returns a Dimension object representing the resolution of the computer screen, whether it is 640 by 480, 800 by 600, or what- ever. The Toolkit class is the abstract subclass of all implementations of the AWT, the default of which is different depending on what operating system you are running. To center the GUIFrame on screen I needed to...

Java Programming for absolute beginner- P16

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The program then obtains the value of the item depend- ing on what type of component it is. because e.getItem() returns the Integer index of the List item that was either selected or deselected. I had to explicitly cast it to an Integer object and call its intValue() method, which returns an int type value of the Integer object. Then...

Java Programming for absolute beginner- P17

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The applet is driven by parameters set within the HTML. None of the ques- tions are hard coded in the applet itself. The questions are specified within the HTML parameters, which enable you to ask any number of questions by modify- ing the HTML file and without having to rewrite or recompile the applet code.. If you experience any difficulty...