Computer Science 202
Introduction to Programming

Fall 2012, The College of Saint Rose

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NumberInfo BlueJ Project

Click here to download a BlueJ project for NumberInfo.

NumberInfo Source Code

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

NumberInfo.java

/*
 * Example NumberInfo: a method that takes a parameter
 *
 * Jim Teresco, The College of Saint Rose, CSC 202, Fall 2012
 *
 * $Id: NumberInfo.java 1975 2012-11-07 18:41:56Z terescoj $
 */

import java.util.Random;

public class NumberInfo {

    // a method to take an int as a parameter and print the number,
    // its square, and its square root
    public static void showNumberInfo(int num) {

        // within this method, num acts like a local variable
        // that is initialized to whatever is passed in the
        // parentheses when we call it
        System.out.println(num + " squared is " + (num * num) +
            " and its square root is " + Math.sqrt(num));
    }

    public static void main(String[] args) {

        // we'll use some random numbers
        Random randGen = new Random();
        
        // call the method, this time setting the num parameter to 2
        showNumberInfo(2);
        
        // now, call the method 6 times, with the numbers 5 through 10
        for (int number = 5; number <= 10; number++) {
            showNumberInfo(number);
        }
        
        // call it 5 more times, with random numbers in the 0-99 range
        for (int index = 1; index <= 5; index++) {
            int randomNumber = randGen.nextInt(100);
            showNumberInfo(randomNumber);
        }
    }
}