Matrix

Matrix.java

/**
 * Ce programme calcule la matrice inverse à l'aide du
 * pivot de Gauss.
 * @author Adrien Tétar
 * @version 1.0-WIP
 *
 * Copyright © 2012, Adrien Tétar. All rights reserved.
 */
import java.awt.GridLayout;
import javax.swing.*;

class Main {
	/**
	 * @mat: matrix declared in main (e.g: mat[][] = new int[3][3];)
	 * @rows: number of matrix rows (e.g: int rows = 3;)
	 * @columns: number of matrix columns (e.g: int columns = 3;)
	 */
	public static int[][] inputMatrix(int[][] mat, int rows, int columns)
	{
		JPanel panel = new JPanel();     
		panel.setLayout(new GridLayout(rows,columns));

		for (int a=0; a<(rows*columns); a++)
		{
			panel.add(new JTextField(a));
		}

		if (JOptionPane.showConfirmDialog(null, panel, "Enter the matrix", JOptionPane.OK_CANCEL_OPTION)
										== JOptionPane.OK_OPTION)
		{
			for(int a=0; a<(rows*columns); a++){
				for(int b=0; b<rows; b++){
					for(int c=0; c<columns; c++){
						/* FIXME: the crap below catches wrong values... */
						mat[b][c] = Integer.parseInt(((JTextField)panel.getComponent(a)).getText());
					}
				}
			}
		}
		/* If the user clicks on Cancel, quit the program immediately. */
		else
		{
			System.exit(0);
		}
		
		return mat;
	}
	
	/* Display an array of arrays. */
	public static void dispMatrix(int[][] mat, int rows, int columns)
	{
		for(int a=0; a<rows; a++){
			for(int b=0; b<columns; b++){
				System.out.print(mat[a][b] + " ");
			}
			System.out.print("\n");
		}
	}

	public static void main(String[] args)
	{
		/* Use 3/3 matrix. */
		final int rows = 3;
		final int columns = 3;
		int[][] mat = new int[rows][columns];
		inputMatrix(mat, rows, columns);
//		int[][] mat = {{0, 1, 0}, {1, 0, 1}, {0, 1, 0}};
//		System.out.println(Arrays.toString(mat));
		dispMatrix(mat, rows, columns);
	}
}