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POI can use getActionCommand to change the label content, but I can't use it to change the color?
 

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  1. POI can use getActionCommand to change the label content, but I can't use it to change the color?
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    <p>So with the help of others here I finally managed to code a button that alternates the label "Hello World!" to "Hello Universe!" and back again. I used the code below, and used the same way to try and change the color, but it didn't work as expected. I've been searching for hours on this, but with no avail. Thank you for reading, anything helps!</p> <p>Code: </p> <pre><code>package game; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Javagame extends JPanel implements ActionListener{ protected JButton changetext; protected JButton red; protected JButton green; private JLabel label; public Javagame() { add(changetext = new JButton("Button!")); changetext.setPreferredSize(new Dimension(50, 50)); changetext.setActionCommand("change"); add(red = new JButton("Red")); red.setPreferredSize(new Dimension(50, 50)); red.setActionCommand("changecolorRed"); add(green = new JButton("Green")); green.setPreferredSize(new Dimension(50, 50)); green.setActionCommand("changecolorGreen"); changetext.addActionListener(this); label = new JLabel("Hello World!", SwingConstants.CENTER); label.setFont(new Font("Arial", Font.BOLD, 20)); label.setForeground(new Color(0x009900)); setLayout(new BorderLayout()); add(label, BorderLayout.CENTER); add(changetext, BorderLayout.NORTH); add(red, BorderLayout.WEST); add(green, BorderLayout.EAST); } public void actionPerformed(ActionEvent e) { if ("change".equals(e.getActionCommand())) { label.setText("Hello Universe!"); changetext.setActionCommand("changeBack"); } if ("changeBack".equals(e.getActionCommand())) { label.setText("Hello World!"); changetext.setActionCommand("change"); } if ("changecolorRed".equals(e.getActionCommand())) { label.setForeground(new Color(0xFF0000)); } if ("changecolorGreen".equals(e.getActionCommand())) { label.setForeground(new Color(0x009900)); } } private static void createWindow(){ JFrame frame = new JFrame("Javagame"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setPreferredSize(new Dimension(500,500)); JPanel panel = new JPanel(new BorderLayout()); Javagame newContentPane = new Javagame(); newContentPane.setOpaque(true); frame.setContentPane(newContentPane); frame.setLocationRelativeTo(null); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { createWindow(); } } </code></pre>
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    1. COThe only thing I can think of is that you might be not using the EDT to change the color(Event Dispatch Thread) the default thread you start off with is the EDT, but not Awt-Eventque-0. The EDT is the only one that can perform certain tasks.
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