07/11/02 03:04:48
public class Practice extends JFrame {
JPanel labelsPanel;
public Practice (){
JButton appendLabelButton = new JButton ("ラベルを追加");
appendLabelButton.addActionListener (new ActionListener(){
public void actionPerformed(ActionEvent event){appendLabel();}});
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout());
buttonPanel.add(appendLabelButton);
labelsPanel = new JPanel();
labelsPanel.setLayout(new FlowLayout());
labelsPanel.setPreferredSize(new Dimension(400, 400));
add(buttonPanel, BorderLayout.NORTH);
add(labelsPanel, BorderLayout.CENTER);
}
void appendLabel(){
JLabel helloLabel = new JLabel ("Hello");
helloLabel.setBorder(BorderFactory.createLineBorder(Color.white, 1));
helloLabel.setHorizontalAlignment(JLabel.CENTER);
helloLabel.setPreferredSize(new Dimension(80,30));
labelsPanel.add(helloLabel);
labelsPanel.revalidate();
}
public static void main (String[]args){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
Practice frame = new Practice ();
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.pack();frame.setVisible(true);
}
});
}}