1.简介
Java 怎么合并borderlayout和boxlayout?——请看下文。
2.示例代码
/**
* 版权所有 编程十万个怎么办(www.tah1986.com)
*/
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
public class Layout4 implements ActionListener {
JPanel cards;
final static String[] strings = { "Component 1",
"Component 2 is so long-winded it makes the container wide",
"Component 3" };
private static JComponent createComponent(String s) {
JLabel l = new JLabel(s);
l.setBorder(BorderFactory.createMatteBorder(5, 5, 5, 5,
Color.DARK_GRAY));
l.setHorizontalAlignment(JLabel.CENTER);
return l;
}
public void addCardsToPane(Container pane) {
JRadioButton[] rb = new JRadioButton[strings.length];
ButtonGroup group = new ButtonGroup();
JPanel buttons = new JPanel();
buttons.setLayout(new BoxLayout(buttons, BoxLayout.PAGE_AXIS));
for (int i = 0; i < strings.length; i++) {
rb[i] = new JRadioButton("Show component #" + (i + 1));
rb[i].setActionCommand(String.valueOf(i));
rb[i].addActionListener(this);
group.add(rb[i]);
buttons.add(rb[i]);
}
rb[0].setSelected(true);
cards = new JPanel(new CardLayout());
for (int i = 0; i < strings.length; i++) {
cards.add(createComponent(strings[i]), String.valueOf(i));
}
pane.add(buttons, BorderLayout.NORTH);
pane.add(cards, BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent evt) {
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, (String) evt.getActionCommand());
}
private static void createAndShowGUI() {
JFrame frame = new JFrame("Layout4");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Layout4 demo = new Layout4();
demo.addCardsToPane(frame.getContentPane());
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
展开全文
评论