Write a program to handle negative salary exception

Write a program to handle negative salary exception

1.Exception Creation Program

package employeesalary;
public class Nsalary extends Exception
{
    public Nsalary(String s)
    {
        super(s);
    }
};

2.Exception verification Program

package verifysalary;
import employeesalary.Nsalary;
public class Verify
{
    public void checkasalary(int a) throws Nsalary
    {
        if(a>0)
        { 
            System.out.print("valid salary");
        }
        else
        {
            Nsalary n=new Nsalary("Invalid salary");
            throw(n);
        }
    }
}

3.Main Program

import employeesalary.Nsalary;
import verifysalary.Verify;
import java.util.Scanner;
public class Main
{
    public static void main(String args[])
    {
        System.out.print("Enter your Salary : ");
        Scanner s=new Scanner(System.in);
        try
        {
            int salary=s.nextInt();
            Verify v=new Verify();
            v.checkasalary(salary);
            System.out.print("your salary is : "+salary);
        }
        catch(Nsalary ne)
        {
            System.out.println("salary should not be Negative");
        }
    }
}

Enter your Salary: 20000
Valid Salary
your Salary is : 20000

Enter your Salary : -20000
Salary should not be Negative.


What is difference between the throws and throw ?
Throws is a keyword used to forward the exception to the method call whereas throw is a keyword used to throw exception to the method sign.
Throws always should be followed by method signature whereas throw keyword always should exist within method only.

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