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PODrawing a shape by clicking a JButton
 

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  1. PODrawing a shape by clicking a JButton
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    <p>I am currently trying to draw a figure by clicking a button. My problems occurs when I click the button and it does not show up in the panel, but I know it's drawing because it runs through the loop.</p> <p>The drawing will occur when I request the panel to draw it inside the constructor, but not inside the button, inside the constructor</p> <p>If i put the code in the method "stuff()" inside the constructor it will draw everything just fine.</p> <pre><code>import java.awt.BorderLayout; import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JPanel; public class MainFrame{ public static void main(String[]args){ MainFrame f = new MainFrame(); } public JFrame frame = new JFrame(); public JPanel panel = new JPanel(new BorderLayout()); public MainFrame(){ JButton button1 = new JButton("Shweet Button"); button1.setBounds(185, 10, 130, 20); frame.setBounds(1680/4,1050/4,500, 500); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); frame.add(panel); panel.setBackground(Color.black); frame.setVisible(true); frame.getContentPane().setLayout(null); frame.add(button1); button1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { stuff(); } }); } public void stuff(){ for(int i = 0;i&lt;1000;i++){ panel.add(new paintComponent()); panel.setBackground(Color.black); frame.repaint(); try { Thread.sleep(80); } catch (InterruptedException e1){e1.printStackTrace();} } } static class paintComponent extends JComponent{ public int options; public void paint(Graphics g){ Graphics2D g2 = (Graphics2D)g; g2.setColor(Color.white); if(options == 0){ options = 1; g2.drawOval(50, (JFrame.HEIGHT/2)+100, 50, 50); g2.drawOval(60, (JFrame.HEIGHT/2)+110, 8, 8); g2.fillOval(60, (JFrame.HEIGHT/2)+110, 8, 8); g2.drawOval(80, (JFrame.HEIGHT/2)+110, 8, 8); g2.fillOval(80, (JFrame.HEIGHT/2)+110, 8, 8); g2.drawArc(65, (JFrame.HEIGHT/2)+130, 100, 0, 140, 30); g2.drawLine(75, (JFrame.HEIGHT/2)+150, 75, (JFrame.HEIGHT/2)+220); g2.drawLine(75, (JFrame.HEIGHT/2)+180, 100, (JFrame.HEIGHT/2)+160); g2.drawLine(75, (JFrame.HEIGHT/2)+180, 65, (JFrame.HEIGHT/2)+210); g2.drawLine(75, (JFrame.HEIGHT/2)+220, 50, (JFrame.HEIGHT/2)+260); g2.drawLine(75, (JFrame.HEIGHT/2)+220, 100, (JFrame.HEIGHT/2)+260); }else if(options == 1){ options = 0; g2.drawOval(50, (JFrame.HEIGHT/2)+100, 50, 50); g2.drawOval(60, (JFrame.HEIGHT/2)+110, 8, 8); g2.fillOval(60, (JFrame.HEIGHT/2)+110, 8, 8); g2.drawOval(80, (JFrame.HEIGHT/2)+110, 8, 8); g2.fillOval(80, (JFrame.HEIGHT/2)+110, 8, 8); g2.drawArc(65, (JFrame.HEIGHT/2)+130, 100, 0, 140, 30); g2.drawLine(75, (JFrame.HEIGHT/2)+150, 75, (JFrame.HEIGHT/2)+220); g2.drawLine(75, (JFrame.HEIGHT/2)+180, 100, (JFrame.HEIGHT/2)+180); g2.drawLine(75, (JFrame.HEIGHT/2)+180, 65, (JFrame.HEIGHT/2)+210); g2.drawLine(75, (JFrame.HEIGHT/2)+220, 50, (JFrame.HEIGHT/2)+260); g2.drawLine(75, (JFrame.HEIGHT/2)+220, 100, (JFrame.HEIGHT/2)+260); } } } } </code></pre>
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    1. PO
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    1. PTQuestion
    1. USmKorbel
    1. USLoligans
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. VO
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      1. PODrawing a shape by clicking a JButton
      1. This table or related slice is empty.
      1. VTUpMod
    1. COYou're block the Event Dispatching Thread, which is preventing it from updating the UI
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      1. USMadProgrammer
    2. COdo you have to post so much code? Will it suffice if you just have one drawOvel line for each of the two options?
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      1. USOliver Watkins
    3. COApplcation Looks like hang the Execution
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      1. USAkshay Joy
 

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