Java 怎么合并borderlayout和boxlayout

2019年7月13日22:35:27 评论 81

1.简介

Java 怎么合并borderlayout和boxlayout?——请看下文。

2.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();
            }
        });
    }
}



 

3.总结

示例代码演示了 Java 怎么合并borderlayout和boxlayout,具体步骤参见示例代码。

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