import javax.swing.*;		// for JFrame, JLabel, JPanel
import java.awt.*;			// for GridLayout
import java.util.*;			// for Random

public class Ch12_14		// Creates a GUI that will place into 100 JLabels a random number in each, and then
{							// insert the 100 JLabels into a JPanel using a 10x10 grid, the alignment of each
	public static void main(String[] args)		// JLabel will be center-justified both horizontally and vertically
	{
		JFrame frame=new JFrame("Exercise12_1");				// establish title for JFrame
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);	// establish what to do if JFrame is closed
		frame.setSize(600,600);									// set size to something reasonable for this GUI
		Random g=new Random();
		JLabel[][] lab=new JLabel[10][10];						// create a 2-d array of JLabels to store random numbers
		JPanel p1=new JPanel(new GridLayout(10,10));
		for(int i=0;i<10;i++)
			for(int j=0;j<10;j++)
			{
				lab[i][j]=new JLabel(""+g.nextInt(2));			// instantiate each JLabel with a random binary number as its string
				lab[i][j].setHorizontalAlignment(AbstractButton.CENTER);	// set the String's position within the JLabel
				lab[i][j].setVerticalAlignment(AbstractButton.CENTER);
				p1.add(lab[i][j]);								// add the latest JLabel to the JPanel
			}
			
		frame.add(p1);					// add the JPanel to this JFrame and make the JFrame visible
		frame.setVisible(true);
	}
}