StackOverflow2013

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copied!<p>another way as implementing inner <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/actionlistener.html">ActionListener</a> (with <code>setActionCommand(String actionCommand)</code>) for whole <a href="http://docs.oracle.com/javase/tutorial/uiswing/components/menu.html">JMenu</a> is wrote <a href="http://docs.oracle.com/javase/tutorial/uiswing/misc/action.html">java.swing.Action</a> for each of <code>JMenuItem</code> or implements <a href="http://docs.oracle.com/javase/6/docs/api/java/beans/EventHandler.html">EventHandler</a> (seems like as valid for all <code>Listeners</code> that I tried) </p> <p>example about JButtons and with implemented <code>ActionListener</code> and <code>EventHandler</code> (both <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/index.html">Listeners</a> firing events)</p> <p>EDIT: <code>EventHandler</code> os too hacky, because in Swing aren't another direct method how to call code_block by String value </p> <pre><code>import java.awt.EventQueue; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.beans.EventHandler; import java.util.ArrayList; import java.util.List; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; /** based on @see http://stackoverflow.com/questions/7702697 */ public class GridButtonPanel extends JPanel { private static final int N = 2; private final List<GridButton> list = new ArrayList<GridButton>(); public GridButtonPanel() { super(new GridLayout(N, N)); for (int i = 0; i < N * N; i++) { int row = i / N; int col = i % N; GridButton gb = new GridButton(row, col); gb.addActionListener((ActionListener) EventHandler.create(ActionListener.class, this, "actionName" + row + "A" + col)); list.add(gb); this.add(gb); } } public void actionName0A0() { System.out.println(" Grid at Row 0, Column 0 "); } public void actionName0A1() { System.out.println(" Grid at Row 0, Column 1 "); } public void actionName1A0() { System.out.println(" Grid at Row 1, Column 0 "); } public void actionName1A1() { System.out.println(" Grid at Row 1, Column 1 "); } private GridButton getGridButton(int r, int c) { int index = r * N + c; return list.get(index); } private class GridButton extends JButton { private int row; private int col; public GridButton(int row, int col) { super("Row - " + row + ", Col - " + col); this.row = row; this.col = col; this.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { int r = GridButton.this.row; int c = GridButton.this.col; GridButton gb = GridButtonPanel.this.getGridButton(r, c); System.out.println("r" + r + ",c" + c + " " + (GridButton.this == gb) + " " + (GridButton.this.equals(gb))); } }); } } private void display() { JFrame f = new JFrame("GridButton"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(this); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new GridButtonPanel().display(); } }); } } </code></pre>

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