title: Action listener for JButton array
body: <p>Let's say I have a program with 2D array of buttons, and when you click one of them it turns red. I didn't want to declare every single button seperately so I just created JButton[][] array for them. The problem is that I don't know how to use action listener on any of the buttons in the array so it would change the color of this particular button, and none of related questions is relevant to this. I tried to use "for" but it doesn't help:</p>
  
  <pre><code>package appli;
  
  import javax.swing.*;
  import java.awt.*;
  import java.awt.event.*;
  
  public class MainW extends JFrame implements ActionListener {
  
      public MainW(){
          setSize(640,480);
          setTitle("title");
          setLayout(null);
          JButton[][] btnz = new JButton[5][5];
          for(Integer i=0;i&lt;5;i++)
          {
              for(Integer j=0;j&lt;5;j++)
              {
                  btnz[i][j]= new JButton("");
                  btnz[i][j].setBackground(Color.WHITE);
                  btnz[i][j].setBounds(10+20*i,10+20*j,20,20);
                  add(btnz[i][j]);
                  btnz[i][j].addActionListener(this);
              }
          }
          setDefaultCloseOperation(EXIT_ON_CLOSE);
          setVisible(true);
      }
  
      public void actionPerformed(ActionEvent e){
          for(Integer i=0;i&lt;5;i++)
          {
              for(Integer j=0;j&lt;5;j++)
              {
                  if (e.getSource()==btnz[i][j]);
                  {
                      btnz[i][j].setBackground(Color.RED);
                  }
              }
          }
      }
  
  }
  </code></pre>