Back to notes
What is the importance of error handling and user input validation in Java applications?
Press to flip
Error handling ensures the program can gracefully handle unexpected situations, and input validation prevents invalid data from causing runtime errors or incorrect behavior.
Explain the role of access modifiers in Java.
Access modifiers control the visibility and accessibility of classes, methods, and variables, with common modifiers being `public`, `private`, `protected`, and package-private.
What is the significance of the IntelliJ IDEA in Java development?
IntelliJ IDEA is a powerful IDE recommended for Java development, providing tools for code editing, debugging, and managing Java projects efficiently.
How does the 'DRY' principle apply to writing clean code in Java?
The DRY (Don't Repeat Yourself) principle emphasizes eliminating code duplication by creating reusable methods or components, enhancing maintainability and readability.
What are the four editions of Java and their primary uses?
The four editions are Java SE (Standard Edition for general-purpose programming), Java EE (Enterprise Edition for large-scale applications), Java ME (Micro Edition for mobile and embedded devices), and Java Card (for smart cards).
Describe the core differences between 'if' statements and 'switch' statements in Java.
While both are used for conditional logic, 'if' statements are suitable for complex conditions, and 'switch' statements are ideal for checking a variable against multiple discrete values.
Why is the main function considered the entry point of a Java application?
The main function is where the JVM begins program execution, as it is designated with the `public`, `static`, and `void` keywords.
How does the Java Virtual Machine (JVM) ensure platform independence for Java programs?
The JVM executes Java bytecode, which allows Java applications to run on any platform with a compatible JVM implementation, ensuring platform independence.
Explain the process of compiling and executing a Java program.
Compiling transforms source code into bytecode using the Java compiler. Execution then runs this bytecode using the Java Virtual Machine (JVM).
Describe the difference between primitive and reference types in Java.
Primitive types, such as int, float, char, and boolean, hold their values directly, while reference types, like Strings and arrays, store references to objects.
What are the consequences of not initializing variables in Java before use?
Using uninitialized variables can lead to compilation errors in Java, as the language enforces definite assignment to prevent unpredictable behavior.
What are the key features of functions in Java?
In Java, functions are defined by a return type, a function name, parameters within parentheses, and a code block enclosed in curly braces.
Discuss the evolution and impact of Java since its creation by James Gosling.
Since its development in 1995, Java has grown to become a versatile and widely-used language, with a large developer community and applications across various platforms.
Outline the steps for creating a new Java project in IntelliJ IDEA.
Set the project type to Java, select the correct JDK version, set up a command-line application template, and define the base package name for organization.
What is the purpose of the Java Development Kit (JDK) in Java development?
The JDK provides the necessary tools and environment to develop and run Java programs by compiling and executing Java code.
Previous
Next