Java/FunWithLooping at master · rdtheriault/Java · GitHub

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  /***********************************************************************
  Program Name: Diamond.java
  Programmer's Name: Robert Theriault
  Program Description: Make a diamond with stars
  ***********************************************************************/

import java.util.Arrays;
import javax.swing.*;


public class Diamond {

  /**
   * @param args
   */

  public static void main(String[] args)
  {

  	String input = "";
  	int number = 0;
  	boolean true1 = true;

  	while (true1)
  	{
  	//Ask for radius and convert to integer
  	input = JOptionPane.showInputDialog("Enter an Odd Number between 3-15");

  		try//test in integer
  		{
  			number =(int) Double.parseDouble(input);
  			if (number < 3 || number > 15)//test if inbetween 3-15
  			{
  				JOptionPane.showMessageDialog(null,  "You need to enter a number between 3-15");
  			}
  			else if (number % 2 == 0)//test if odd
  			{
  				JOptionPane.showMessageDialog(null,  "You need to enter an Odd number");
  			}
  			else
  			{
  				true1 = false;
  			}
  		}
  		catch (NumberFormatException nfe)
  		{
  			JOptionPane.showMessageDialog(null,  "You need to enter an Integer");
  		}

  	}

  	//find halfway point and create holderString to add *'s to String array
  	int half = number/2+1;
  	int halfHolder = half;
  	String holderString = "";

  	//create string array to hold *'s
  	String[] diamondString = new String[number];
  	Arrays.fill(diamondString, "");
  	int a = 0;//array holder


  	//Top half of the diamond
  	while (halfHolder != 0)
  	{
  		//add * to string at a
  		diamondString[a] = "*" + holderString;
  		holderString = holderString + "**";

  		halfHolder = halfHolder -1;

  		a = a + 1;//increment array spot
  	}

  	holderString = "*";//reset holderString gives odd number

  	//bottom half of diamond
  	while (a < number)
  	{
  		for (int s = a; s <= number-2; s++ )
  		{
  				holderString += "**" ;
  		}

  		diamondString[a] =  holderString;

  		holderString = "*";//reset holderString gives odd number

  		a = a + 1;//increment array spot
  	}


  	//Create html string in order to display centered in JLabel
  	String message = "<html><body><div width='50px' align='center'>";

  	for (int i = 0; i < number; i++)
  	{
  		message = message + "<br>" + diamondString[i];
  	}

  	message = message + "</div></body></html>";

  	JLabel messageLabel = new JLabel(message);

  	JOptionPane.showMessageDialog(null, messageLabel);


  }


}