testchangelayout.java

java绘图 java awt 经典绘图的例子,对于初学awt模块的人非常有帮助.

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package swing;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

/**
 *
 * @author zhaolin
 */
public class TestChangeLayout extends JFrame {

    JButton jb1 = new JButton("1");
    JButton jb2 = new JButton("2");
    JButton jb3 = new JButton("3");
    JButton jb4 = new JButton("4");
    JButton jb5 = new JButton("5");
    Container c = new JPanel();
    Container control = new JPanel();
    JButton jbFlowLayout = new JButton("流式布局");
    JButton jbBorderLayout = new JButton("边框布局");

    public TestChangeLayout() {
        c.add(jb1);
        c.add(jb2);
        c.add(jb3);
        c.add(jb4);
        c.add(jb5);
        control.add(jbFlowLayout);
        control.add(jbBorderLayout);
        jbFlowLayout.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //c.removeAll();
                c.setLayout(new FlowLayout());
                c.add(jb1);
                c.add(jb2);
                c.add(jb3);
                c.add(jb4);
                c.add(jb5);
                c.validate();
            }
        });
        jbBorderLayout.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //c.removeAll();
                c.setLayout(new BorderLayout());
                c.add(jb1,"North");
                c.add(jb2,"South");
                c.add(jb3,"Center");
                c.add(jb4,"West");
                c.add(jb5,"East");
                c.validate();
            }
        });


        this.getContentPane().add(c);
        this.getContentPane().add(control, "South");
        this.pack();
        this.setVisible(true);
    }

    public static void main(String[] args) {
        new TestChangeLayout();
    }
}