Computer Science 210
Data Structures

Fall 2019, Siena College

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SumOfSquares BlueJ Project

Click here to download a BlueJ project for SumOfSquares.

SumOfSquares Source Code

The Java source code for SumOfSquares is below. Click on a file name to download it.

SumOfSquares.java

/**
 * Example SumOfSquares, demonstrating a static method and
 * the use of JOptionPane for input/output.
 *
 * @author Jim Teresco, The College of Saint Rose, CSC 202, Fall 2012
 * Updated for Siena College, CSIS 210, Fall 2016, Fall 2019
 *
 * @version Fall 2019
 */

import javax.swing.JOptionPane;

public class SumOfSquares {

    /**
      a method that takes 2 parameters, both numbers, and then
     computes the sum of their squares and prints a message.  num1 and
     num2 act like variables that are initialized to the first and
     second parameters in each call to sumSquares from somewhere else

     @param num1 the first number
     @param num2 the second number
    */
    public static void sumSquares(int num1, int num2) {
        
        int sumSq = num1 * num1 + num2 * num2;
	// instead of printing to the console with System.out.println,
	// we will print our result here with a popup window.  Note the
	// additional import statement at the top to bring in the
	// JOptionPane class
        JOptionPane.showMessageDialog(null, "The sum of the squares of " + num1 
            + " and " + num2 + " is " + sumSq);
    }

    /**
       main method to test the sumSquares method.

       @param args not used
    */
    public static void main(String[] args) {
    
	// We also use a JOptionPane input dialog box to read in our input.
	// Note that showInputDialog always gives us back a String, so we
	// need to convert that to an int using Integer.parseInt.
        
        // we need two integers to operate on
        String input = JOptionPane.showInputDialog("Please enter the first number");
        int firstNum = Integer.parseInt(input);
        
        input = JOptionPane.showInputDialog("Please enter the second number");
        int secondNum = Integer.parseInt(input);
        
        // call our method.  The value of firstNum will be used to initialize
        // num1 in the method, secondNum will be used to initialize num2 in 
        // the method
        sumSquares(firstNum, secondNum);
        
    }
}