TAILIEUCHUNG - Lecture An introduction to object-oriented programming with Java: Chapter 12 - C. Thomas Wu

Chapter 12 - File input and output. After you have read and studied this chapter, you should be able to: Include a JFileChooser object in your program to let the user specify a file; write bytes to a file and read them back from the file, using FileOutputStream and FileInputStream; write values of primitive data types to a file and read them back from the file, using DataOutputStream and DataInputStream;. | ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 12 - Chapter 12 File Input and Output Animated Version Introduction to OOP with Java 4th Ed, C. Thomas Wu © The McGraw-Hill Companies, Inc. ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 12 - Chapter 12 Objectives After you have read and studied this chapter, you should be able to Include a JFileChooser object in your program to let the user specify a file. Write bytes to a file and read them back from the file, using FileOutputStream and FileInputStream. Write values of primitive data types to a file and read them back from the file, using DataOutputStream and DataInputStream. Write text data to a file and read them back from the file, using PrintWriter and BufferedReader Read a text file using Scanner Write objects to a file and read them back from the file, using ObjectOutputStream and ObjectInputStream Intro to OOP with Java, C. Thomas Wu ©The McGraw-Hill Companies, Inc. ©The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 12 - The File Class To operate on a file, we must first create a File object (from ). File inFile = new File(“”); File inFile = new File (“C:/SamplePrograms/”); Opens the file in the current directory. Opens the file in the directory C:\SamplePrograms using the generic file separator / and providing the full pathname. Intro to OOP with Java, C. Thomas Wu ©The McGraw-Hill Companies, Inc. When a program that manipulates a large amount of data practical, we must save the data to a file. If we don’t, then the user must reenter the same data every time he or she runs the program because any data used by the program will be erased from the main memory at program termination. If the data were saved, then the program can read them back from the file and rebuild the information so the user can work on the data .

• Kỹ thuật lập trình
• Object oriented programming
• Object oriented programming with Java
• Programming language
• Java programming language
• JFileChooser object
• Primitive data types
• Introduction to java programming
• Primitive Data Types and Operation
• Declaring Variables
• Assignment Statements
• Declaring and Initializing in One Step
• Numerical Data Types
• ngôn ngữ lập trình
• lập trình
• ngôn ngữ C#
• C#
• Bài giảng ngôn ngữ lập trình Java
• Abstract data types
• Formatting numeric ouput
• Using named constants
• Fundamentals of computing
• Lecture Fundamentals of computing 1
• Data types
• Number primitive types
• Java programming
• Mixing types
• Data structures
• Algorithms in Java
• Stacks and queues
• Objects in a Nutshell
• Inheritance and Polymorphism
• Primitive variable types
• The array workshop applet
• Advanced Programming Language
• Undamentals of programming
• Primitive Data Types and Operations
• Control Statements
• Loop Statements
• SelfTest Website
• Two dimensional array