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POHow to get X and Y index of element inside GridLayout?
 

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  1. POHow to get X and Y index of element inside GridLayout?
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    <p>I am studying a java tutorial and saw that the way to find the x/y indexes of a JButton inside a GridLayout is to traverse a bidimensional array of buttons b which is associated to the layout and checking if</p> <p><code>b[i][j] == buttonReference</code>.</p> <pre><code> @Override public void actionPerformed(ActionEvent ae) { JButton bx = (JButton) ae.getSource(); for (int i = 0; i &lt; 5; i++) for (int j = 0; j &lt; 5; j++) if (b[i][j] == bx) { bx.setBackground(Color.RED); } } </code></pre> <p>Is there an easier way to get the X/Y indexes of a button?</p> <p>Something like:</p> <pre><code>JButton button = (JButton) ev.getSource(); int x = this.getContentPane().getComponentXIndex(button); int y = this.getContentPane().getComponentYIndex(button); </code></pre> <p><code>this</code> being a GameWindow instance and <code>ev</code> the ActionEvent triggered when the user presses the button.</p> <p><img src="https://i.imgur.com/AWNw0.png" alt=""></p> <p>In this case it should get: x == 2, y == 1</p> <p>@GameWindow.java:</p> <pre><code>package javaswingapplication; import java.awt.Color; import java.awt.GridLayout; import java.awt.event.*; import javax.swing.*; public class GameWindow extends JFrame implements ActionListener { JButton b[][] = new JButton[5][5]; int v1[] = { 2, 5, 3, 7, 10 }; int v2[] = { 3, 5, 6, 9, 12 }; public GameWindow(String title) { super(title); setLayout(new GridLayout(5, 5)); setDefaultCloseOperation(EXIT_ON_CLOSE ); for (int i = 0; i &lt; 5; i++) for (int j = 0; j &lt; 5; j++) { b[i][j] = new JButton(); b[i][j].addActionListener(this); add(b[i][j]); } } @Override public void actionPerformed(ActionEvent ae) { ((JButton)ae.getSource()).setBackground(Color.red); } } </code></pre> <p>@JavaSwingApplication.java:</p> <pre><code>package javaswingapplication; public class JavaSwingApplication { public static void main(String[] args) { GameWindow g = new GameWindow("Game"); g.setVisible(true); g.setSize(500, 500); } } </code></pre>
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    1. COare you want to know that (from your picture) that from 3rd. column and 2dn. row
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    2. COIf you start from 0; it is 2nd and 1st.
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      1. USMasterCassim
 

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