Shameen Shahid

To throw a Java exception, the “throw” statement creates a new Exception with a custom message. The exception thrown will be caught by the relevant catch block.

To get the Java file size, use the length() method of the File class, available() method of FileInputStream class, or size() method of the FileUtils class, etc.

To input a string in Java, use the built-in methods of the Scanner, Console, or BufferedReader class or provide the input via the Command-Line args.

To reverse a string in Java, built-in classes and methods along with custom logic or data structures like stack and deque, etc, are used in this guide.

To import the Java Scanner class, use “import java.util.Scanner;”, import java.util.*” or a Scanner class object creation in this guide.

To clear the console, screen, or terminal in Java, use different ANSI escape codes and methods. They clear the console/screen in Java.

The Java readLine() method reads one line of text from different input streams via various classes e.g., RandomAccessFile, Console class, etc.

To calculate the length of 2D arrays, use the “arrayname[i].length” syntax, which will return the length of each column per row as shown in this guide.