Java File Handling Concepts

This video tutorial by Alex explains how to read and write files in Java. It starts with setting up a Java project and creating a class. The tutorial then covers reading a file using Java's Scanner class, handling exceptions, and using loops to read all lines. Finally, it demonstrates exporting the file contents to a new file using FileWriter. The video is designed for beginners and includes practical examples and tips.

What is the first step in setting up a Java project for file reading?

• Create a new Java class

• Import necessary libraries

• Open the file directly

• Write the main method

Which class is used to open a file in Java?

• BufferedReader

• Scanner

• File

• FileReader

What must be done to handle a 'File Not Found' exception?

• Ignore the error

• Add a throws declaration

• Use a try-catch block

• Restart the program

Which Java class is used to read lines from a file?

• BufferedReader

• FileReader

• InputStream

• Scanner

What method is used to read the next line from a file using Scanner?

• read()

• readLine()

• next()

• nextLine()

What type of loop is introduced to read all lines from a file?

• Enhanced for loop

• For loop

• Do-while loop

• While loop

What is the purpose of the 'hasNextLine()' method in Scanner?

• To check if the file is empty

• To determine if there are more lines to read

• To close the file

• To write to the file

Which class is used to write contents to a new file in Java?

• BufferedWriter

• OutputStream

• FileWriter

• PrintWriter

What must be done after writing to a file using FileWriter?

• Read the file again

• Delete the file

• Close the FileWriter

• Reopen the file

What is the purpose of concatenating strings when exporting file contents?

• To accumulate all lines into a single string

• To compress the data

• To format the data

• To encrypt the data