Understanding Continue Keyword and File Input/Output in Java

Flashcards to help review key concepts and operations related to the continue keyword and file input/output in Java.

What does the continue keyword do in a loop in Java?

The continue keyword skips the current iteration and proceeds to the next iteration of the loop.

How does the value of variable j change during the inner loop when using continue?

The value of j is not changed by continue; it remains the same as when continue was invoked.

What will happen if you do not initialize a variable before using it in Java?

The variable may hold an undefined value, leading to potential errors in the program.

What are the three main steps when working with files in Java?

1) Open the file, 2) Perform operations (read/write), 3) Close the file.

What is the purpose of the PrintWriter class in Java?

PrintWriter is used to write formatted text to a file.

What is the difference between print() and println() methods of the PrintWriter class?

print() outputs without adding a new line, whereas println() adds a new line after the output.

What should you do to handle exceptions that may arise during file operations in Java?

Use try-catch blocks or declare throws IOException in the method signature.

What is a reference variable in Java?

A reference variable contains the address of an object in memory, allowing access to its properties and methods.

What happens if you try to read past the end of a file in Java?

An exception will occur if the program attempts to read beyond the file's content.

What is one method to append data to a file in Java?

Use FileWriter with an argument set to true to enable appending.