Có 20+ tài liệu thuộc chủ đề "nhập môn java"
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CH ƯƠ NG I - B T Đ U V I JAVA Ắ Ầ Ớ Bài 1 – Hello world. B n hãy xem bài c a anh CEO trong JVN ạ ủ Bài 2 – In ra chu i nh p vào ỗ ậ. import java.io.*;. InputStreamReader(System.in));. System.out.print("Your name is: ");. str = in.readLine();. System.out.println("Welcome ". *Lí thuy t:...
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Khai báo m t thu c tính: ộ ộ Khai báo 1 thu c tính ộ. T th 1 là khai báo quy n truy xu t,có 3 lo i ừ ứ ề ấ ạ -public:đ ượ c phép truy xu t t b t c n i nào ấ ừ ấ ứ ơ -protected:ch có l p con m...
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Th ba, 19 Tháng ứ vinajava H ướ ng d n l p trình Java ẫ ậ. Khi ch y đo n mã này b n s th y xu t hi n thông báo ạ ạ ạ ẽ ấ ấ ệ java.lang.ArithmeticException: divide by zero. Và ch ươ ng trình s thoát ra ngay lúc đó. Mu n ch...
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Đ bi t đ ể ế ượ c ph n t nào đã đ ầ ử ượ c ch n, ta dùng 2 ph ọ ươ ng th c int getSelectedIndex() và String ứ getSelectedItem(). int getSelectedIndex() s tr v s th t c a ph n t đã đ ẽ ả ề ố ứ ự ủ ầ ử ượ...
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Đ bi t đ ể ế ượ c ph n t nào đã đ ầ ử ượ c ch n, ta dùng 2 ph ọ ươ ng th c int getSelectedIndex() và String ứ getSelectedItem(). int getSelectedIndex() s tr v s th t c a ph n t đã đ ẽ ả ề ố ứ ự ủ ầ ử ượ...
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Các loại chương trình viết bằng Java. Do vậy nó sử dụng các cú pháp của C và các đặc trưng hướng đối tượng của C++.. Java là ngôn ngữ lập trình hướng đối tượng, do vậy không thể dùng Java để viết một chương trình hướng chức năng. Java là ngôn ngữ vừa biên dịch vừa thông dịch. Sau ...
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Tour of the Book xxxiii. A Tour of the Optional Case Study on Object-Oriented Design with the UML xliii. A Tour of the Optional GUI and Graphics Case Study xlv. Section 1.10. Section 1.11. Section 1.12. Section 1.13. Section 1.14. Section 1.15. Section 1.16. Section 1.17. Section 1.18. Section 2.10. (Optional) GUI and Graphics Case Study: Using Dialog Boxes 104...
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Software Included with Java How to Program, 6/e. We wrote Java How to Program, 6/e using only the new Java 2 Standard Edition. The CD that accompanies Java How to Program, 6/e, contains several Java editors, including BlueJ Version 1.3.5, JCreator Lite Version 3.10 (Windows only), jEdit Version 4.1 and jGRASP Version 1.7.0.. If you have questions about using this...
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Ken Thompson modeled many features in his language B after their counterparts in BCPL, using B to create early versions of the UNIX operating system at Bell Laboratories in 1970.. It initially became widely known as the development language of the UNIX operating system. Today, most of the code for general-purpose operating systems (e.g., those found in laptops, desktops, workstations...
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Most of the Java programs you will study in this book process information and display results.. (Later in this section we will discuss how to compile and run an application.) The program and its output are shown in Fig. The output appears in the light blue box at the end of the program. We will soon see that line 9...
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You have already read descriptions of the ATM system's use cases in the requirements document. produced during the analysis stage of the software life cycle. Therefore, the actor in each of the three use cases is the user who interacts with the ATM. An external entitya real personplays the part of the user to perform financial transactions. In the next...
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We can use courseName in the methods of class GradeBook because courseName is a field of the class. Note that the first line of the output shows the name ". 3.8) skips a line in the output, then line 27 calls object myGradeBook 's displayMessage method to display the welcome message containing the course name.. objectthat is, any class that...
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The challenge of the era for programmers was to shift their styles to ". Communications of the ACM, Vol. When we introduce Java's implementations of control structures, we will refer to them in the terminology of the Java Language Specification as "control statements.". Activity diagrams are part of the UML. arrows, which represent the flow of the activity, that is,...
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set the size of the frame 20 application.setVisible( true. Methods getWidth and getHeight return the width and the height of the JPanel respectively. The first two arguments are the x- and y- coordinates for one endpoint of the line, and the last two arguments are the coordinates for the other endpoint of the line. If you resize the window, the...
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For example, the body of the for statement in lines 1112 of Fig. 5.5 could be merged into the increment portion of the for header by using a comma as follows:. Manipulations of other variables should appear either before the loop (if they execute only once, like initialization statements) or in the body of the loop (if they execute once...
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The general format of the for statement is. For example, a local variable can be used only in the method that declares the variable and only from the point of declaration through the end of the method.. The expression in parentheses following keyword switch is called the controlling expression of the switch . A program compares the value of the...
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The rules of the game are straightforward:. first roll of the dice 27. Each time it is called, rollDice returns the sum of the dice, so the return type int is indicated in the method header (line 68). These are used in the cases of the switch. readability of the program (thus defeating the purpose of using an enum. The...
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6.27 The greatest common divisor (GCD) of two integers is the largest integer that evenly divides each of the two numbers. Count the number of times each side of the coin appears. [Note : If the program realistically simulates coin tossing, each side of the coin should appear approximately half the time.]. the player should be able to eliminate half...
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getCourseName gets the name of the course. output the contents of the grades array 140 public void outputGrades(). create a column heading for each of the tests. To find the lowest overall grade, the inner for statement compares the elements of the current one-dimensional array studentGrades to variable lowGrade . For example, on the first iteration of the outer for...