I have this code for 2d array demo but the rows and cols must be coming from user input someone help me to implement that

package swingDemo; import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.util.ArrayList; import java.util.List; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class Array { public static void main(String[] args) {   new Array(); } public Array() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } JFrame frame = new JFrame("Array"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public static class TestPane extends JPanel {  //how many squares across and down protected static final int ROWS = 15; protected static final int COLS = 15; protected static final int BOX_SIZE = 15; private List colors; //********************************this is the Color array****** Color[][] myColor = new Color[ROWS][COLS]; public TestPane() {  int length = ROWS * COLS;  colors = new ArrayList<>(length);  //these for loops create each color for the squares  for (int row = 0; row < ROWS; row++) {    for (int col = 0; col < COLS; col++) {      int c1 = (int) (Math.random() * 101); //these decide the random colors      int c2 = (int) (Math.random() * 101);      int c3 = (int) (Math.random() * 101);  myColor[row][col] = new Color(c1, c2, c3);  }} } @Override public Dimension getPreferredSize() { return new Dimension(COLS * BOX_SIZE, ROWS * BOX_SIZE); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); int xOffset = (getWidth() - (COLS * BOX_SIZE)) / 1; int yOffset = (getHeight() - (ROWS * BOX_SIZE)) / 1; for (int row = 0; row < ROWS; row++) {  for (int col = 0; col < COLS; col++) {    if(row == 0 || col == 0 || row == 14 || col == 14 || row == col){ //this if statement makes the color red on the outskirts and for the diagonal line      g2d.setColor(Color.blue);      g2d.fillRect(xOffset + (col * BOX_SIZE),      yOffset + (row * BOX_SIZE),      BOX_SIZE, BOX_SIZE);    }    else{ //this statement make a box with a random color      int index = (row * COLS) + col;      g2d.setColor(myColor[row][col]);      g2d.fillRect(xOffset + (col * BOX_SIZE),      yOffset + (row * BOX_SIZE),      BOX_SIZE, BOX_SIZE);    }  } } g2d.dispose(); } } }