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Questions and Answers
What is the purpose of the main() method in Java?
What is the purpose of the main() method in Java?
- It is used to print text to the screen
- It is optional and not necessary in every Java program
- It is used to define additional classes
- It is required and contains the code that will be executed (correct)
What is the naming convention for a Java class?
What is the naming convention for a Java class?
- It should contain a special character
- It should start with an uppercase letter (correct)
- It should start with a lowercase letter
- It should be all lowercase
What is the role of System.out.println() in Java?
What is the role of System.out.println() in Java?
- To execute code outside the main() method
- To define a new class
- To create a new file
- To print a line of text to the screen (correct)
What must the name of a Java file match?
What must the name of a Java file match?
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What does it mean that Java is case-sensitive?
What does it mean that Java is case-sensitive?
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Study Notes
Java Basics
- The
main()method is the entry point for any Java program, where execution of the program begins. - In Java, a class name follows the PascalCase convention, meaning the first letter of each word is capitalized, with no underscores or spaces.
System.out.println()is a statement used to print output to the console, followed by a newline character.- In Java, the name of a Java file must match the name of the public class it contains, and the file extension must be
.java. - Java is case-sensitive, meaning that the programming language treats uppercase and lowercase letters as distinct characters, making
Hellodifferent fromhello.
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