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4.2.4 InvokeLater
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public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable()
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B , textField: import java.awt.Color;
import java.awt.event.ActionEvent; import java.awt.event.ActionListener;
import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField;
public class TestFrame extends JFrame {
static ActionListener buttonClick = new ActionListener() { public void actionPerformed(ActionEvent e) {
System.out.print(text.getText());//` ; : 7
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/**
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static JFrame frame; static JPanel panel; static JTextField text;
private static final long serialVersionUID = 5671798241966272024L;
private static void createFrame()
{
/*Creating the frame*/
frame = new JFrame("Test frame");
// frame.setPreferredSize(new Dimension(260, 225)); frame.setSize(250,250);
//frame.pack(); frame.setVisible(true);
/*Creating the Panel*/ panel = new JPanel(); panel.setSize(100, 100);
panel.setBackground(Color.RED); panel.setVisible(true);
/*Creating the textField*/ text = new JTextField();
text.setText("Input the message here"); text.setSize(200,20);
/*Creating the Button*/ JButton but = new JButton(); but.setText("Hello button");
but.addActionListener(buttonClick); but.setVisible(true);
/*Make a parent tree*/ panel.add(but);//add elements to panel panel.add(text);
frame.add(panel);
}
public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable()
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public void run() { createFrame();
}
});
}
}
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