why object is passed as arguments in java, throws in java,

objects are passed as arguments to allow methods to access and manipulate data that belongs to those objects. While Java is technically always "pass-by-value," when you pass an object, you are actually passing a copy of the reference (the memory address) to that object.

throws in java

throws is a keyword in Java used in a method declaration to specify the exceptions that the method may throw, allowing the caller to handle those exceptions. The caller to these methods has to handle the exception using a try-catch block.

• Declares possible exceptions.
• Mainly used with checked exceptions.

Scanner class methods in java

Scanner class is used for get data from the user using console.

*the package *

import java.util.Scanner;

creating scanner class object

Scanner sc = new Scanner(System.in);

• Scanner → Class name
• sc → Object name
• System.in → Standard input stream (keyboard)

scanner class have different methods for taking data in different data type.

• boolean => nextBoolean()
• byte => nextByte()
• double => nextDouble()
• float => nextFloat()
• int => nextInt()
• long => nextLong()
• short => nextShort()
• String => nextLine()