Happy New Year Program Using Eclipse IDE

Hello Everyone, This is a short Java program using Eclipse IDE. This program uses Multiple Classes to print out a Happy New Year message to the screen. The program has two classes; a mainClass and a secondClass. A simple method with a parameter is used in secondClass to achieve this. The message to be displayed is written in the secondClass and the called in the main class using a “dot” (.) separator. When the program is run, it displays a Happy New Year Pop-Up Message to the screen.

This program illustrates how a user can use multiple classes to write a program, also, using methods to make a program a lot shorter than when all the code is contained in the main class.

Program prompts user to enter year when it is run.

A message is displayed on the screen.

Program ends if user exits prematurely.

GitHub Account

Source Codes from GitHub Account

SECOND CLASS

Line 1: Import Statement

Line 3: Package Name

Line 4: Method. A method with a single parameter is written. The Method will display a Message to the screen when called.

Line 5: Method Closing Brace.

Line 6: Package Closing Brace.

MAIN CLASS

Line 1: Import Statement

Line 3: Package Name

Line 4: Main Method. Every Java program needs a Main Method to run.

Line 5: Exception Handling try Statement.

Line 6: Variable declaration and Initialization. The user enters a value and it is stored as a String.

Line 7: Conversion. A String variable is converted into an Integer and stored as an Integer variable.

Line 8: Object. An object of the secondClass is created. Objects are needed so the user can call Methods contained in the secondClass.

Line 9: The object created is used to call a Method in the secondClass. An Integer variable is passed as argument for the method to be called successfully. The program displays the message on the screen after the Method is called.

Line 10: Exception Handling try Statement Closing Brace.

Line 11: Exception Handling catch Statement.

Line 12: A message is displayed on the screen if the user ends the program prematurely.

Line 13: Exception Handling catch Statement Closing Brace

Line 14: Main Method Closing Brace.

Line 15: Package Closing Brace.

Code Block

SECOND CLASS

import javax.swing.JOptionPane;

public class secondClass {

    public void displayMessage(int year) {
        JOptionPane.showMessageDialog(null, "Happy New Year " + year);
    }
}

MAIN CLASS

import javax.swing.JOptionPane;

public class mainClass {

    public static void main (String args []) {
        try {
        String numberYear = JOptionPane.showInputDialog("Enter Year");
        int numberYearInt = Integer.parseInt(numberYear);
        secondClass message = new secondClass();
        message.displayMessage(numberYearInt);
    }

        catch (Exception e) {
            JOptionPane.showMessageDialog(null, "You have ended the program");
        }
    }   
}

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