Databases
StackOverflow2013
Postsdbo
PO
 

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    <p><strong>Here is fully working example:</strong></p> <p>On pressing button it'll draw Image on randomly selected <code>JLabel</code></p> <pre><code>package stackoverflow; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; public class DummyColor { private JFrame frame; private JLabel[] labels = new JLabel[4]; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { DummyColor window = new DummyColor(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the application. */ public DummyColor() { initialize(); } /** * Initialize the contents of the frame. */ private void initialize() { frame = new JFrame(); frame.setResizable(false); frame.setBounds(100, 100, 657, 527); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(null); JLabel lbl1 = new JLabel("First BOX"); lbl1.setBounds(10, 11, 273, 194); frame.getContentPane().add(lbl1); JLabel label = new JLabel("Second BOX"); label.setBounds(336, 11, 273, 194); frame.getContentPane().add(label); JLabel label_1 = new JLabel("Third BOX"); label_1.setBounds(10, 251, 273, 194); frame.getContentPane().add(label_1); JLabel label_2 = new JLabel("Fourth BOX"); label_2.setBounds(347, 251, 273, 194); frame.getContentPane().add(label_2); labels[0] = lbl1; labels[1] = label; labels[2] = label_1; labels[3] = label_2; JButton btnPick = new JButton("Place"); btnPick.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { ImageIcon imageIcon = new ImageIcon(DummyColor.class.getResource("/red.jpg")); int randInt = randInt(1, 4); System.out.println(randInt); for (int i = 0; i &lt; labels.length; i++) { JLabel jLabel = labels[i]; if (i == randInt - 1) { jLabel.setIcon(imageIcon); } else { jLabel.setIcon(null); } } } }); btnPick.setBounds(10, 439, 57, 23); frame.getContentPane().add(btnPick); } private static int randInt(int min, int max) { // Usually this can be a field rather than a method variable Random rand = new Random(); // nextInt is normally exclusive of the top value, // so add 1 to make it inclusive int randomNum = rand.nextInt((max - min) + 1) + min; return randomNum; } } </code></pre>
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    1. POPlace image at random grid point on button click
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    1. USMakky
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    1. COcheers buddy! works a treat
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    2. COYou're welcome.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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