30 Questions
What is the primary objective of the Java programming subject in the IT department of Malla Reddy College of Engineering & Technology?
To introduce students to the Java programming language and enable them to create Java programs that leverage the object-oriented features of the Java language.
What is one of the key features of the Java language that students are expected to learn in this subject?
Object-oriented features
What is the name of the GUI component that students will learn to use in this subject?
Swing
What is the programming concept that students will learn to implement in this subject to handle errors?
Exception handling
What is the type of data structure that students will learn to use in this subject?
Arrays and other data collections
What is the proficiency level that students are expected to reach in Java programming by the end of this subject?
To create Java programs
What is the primary focus of Unit-IV in Java programming?
Collection Framework in Java and File Streams
What are the types of JDBC drivers used to connect to a database?
Type 1 to 4 drivers
What is the main difference between AWT and Swing in GUI programming?
Swing is built on top of AWT and provides more advanced GUI components
What is the delegation event model in event handling?
A mechanism for handling events by delegating them to event listeners
What is the purpose of the File class in Java?
File management and input/output operations
What is the main purpose of a Data Access Object (DAO)?
To provide a standardized interface for accessing and manipulating data
What is the trend in computing costs in recent decades due to developments in hardware and software technologies?
Decreasing dramatically
How many general-purpose computers are estimated to be in use worldwide?
About a billion
What is the key programming methodology used by programmers today?
Object-oriented programming
What is the relevance of structured programming in object-oriented programming?
Internal structure of objects is often built using structured-programming techniques
Why do programmers need to learn both structured programming and object-oriented programming?
Because object orientation is built using structured-programming techniques and logic is expressed with structured programming
What is the significance of silicon in computing?
It is one of the most abundant materials on earth and used in making silicon chips
What is the purpose of the init() method in the JLabelDemo class?
The purpose of the init() method in the JLabelDemo class is to initialize the applet.
What is the class that encapsulates the Swing text field?
The class that encapsulates the Swing text field is JTextComponent.
What is the purpose of the cols parameter in the JTextField constructor?
The purpose of the cols parameter in the JTextField constructor is to specify the number of columns in the text field.
What is the layout manager assigned to the content pane in the text field example?
The layout manager assigned to the content pane in the text field example is a flow layout.
What is the purpose of the ImageIcon class in the JLabelDemo class?
The purpose of the ImageIcon class in the JLabelDemo class is to create an icon from an image file.
What is the method that adds the label to the content pane in the JLabelDemo class?
The method that adds the label to the content pane in the JLabelDemo class is the add() method.
In Java, what is the method of Object class that should be notified by notify() or notifyAll() after the specified amount of time?
sleep
What is the purpose of the withdraw method in the Customer class?
to withdraw a specified amount of money
What is the purpose of the SQLException class in Java?
to handle exceptions that occur during database operations
What is the purpose of the getErrorCode method in the SQLException class?
to get the error number associated with the exception
What is the purpose of the synchronized keyword in the withdraw method?
to ensure thread safety
What is an example of inter-thread communication in Java?
the withdraw method in the Customer class
Study Notes
Java Programming
Unit IV: Collection Framework in Java
- Collection framework in Java: introduction, overview, and commonly used collection classes
- Array List, Vector, Hash table, Stack, and Lambda Expressions
- Files and Streams:
- Byte streams
- Character streams
- Text input/output
- Binary input/output
- File management using File class
- Connecting to Database: JDBC Type 1 to 4 drivers, connecting to a database, querying a database, processing results, and updating data with JDBC
- Data Access Object (DAO)
Unit V: GUI Programming with Swing
- AWT class hierarchy
- Introduction to Swing and its components
- Swing Vs AWT
- Hierarchy for Swing components
- Overview of Swing components:
- JButton
- JLabel
- JTextField
- JTextArea
- Simple Swing applications
- Layout management:
- Border layout
- Grid layout
- Flow layout
- Event Handling:
- Events
- Event sources
- Event classes
- Event Listeners
- Delegation event model
- Handling Mouse and Key events
- Adapter classes
Object-Oriented Programming
- Evolution of Computing and Programming
- Object-oriented programming methodology
- Structured programming methodology
- Why teach both methodologies
Java Applet Example
- JLabelDemo class extends JApplet
- Creating an icon and a label
- Adding label to content pane
- Output of the applet
JTextComponent and JTextField
- JTextComponent class extends JComponent
- JTextField class:
- Constructors:
- JTextField()
- JTextField(int cols)
- JTextField(String s, int cols)
- JTextField(String s)
- Creating a text field and adding it to content pane
- Constructors:
Inter-Thread Communication
- Example of inter-thread communication in Java
- Customer class: withdraw method, synchronized, and amount variable
SQLException
- SQLException methods:
- getErrorCode(): gets the error number associated with the exception
- getMessage(): gets the JDBC driver's error message or Oracle error number and message
- getSQLState(): gets the XOPEN SQLstate string
Take this quiz to test your knowledge of Java programming concepts, covering topics from the B.Tech II Year II Semester curriculum. Assess your understanding of Java programming fundamentals, syntax, and applications. Improve your coding skills with this quiz!
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