我需要动态添加组件.而且,我需要动态地改变布局.
解决方法
作为参考,这是一个显示基本方法
sscce的
sscce.这个更精细的
example显示了两个要求：它改变了布局并动态添加了组件.
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
/** @see https://stackoverflow.com/questions/5750068 */
public class DynamicLayout extends JPanel {
private static final LayoutManager H = new GridLayout(1,0);
private static final LayoutManager V = new GridLayout(0,1);
public DynamicLayout() {
this.setLayout(H);
this.setPreferredSize(new Dimension(320,240));
for (int i = 0; i < 3; i++) {
this.add(new JLabel("Label " + String.valueOf(i),JLabel.CENTER));
}
}
private void display() {
JFrame f = new JFrame("DynamicLayout");
f.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
JPanel p = new JPanel();
p.add(new JButton(new AbstractAction("Horizontal") {
@Override
public void actionPerformed(ActionEvent e) {
DynamicLayout.this.setLayout(H);
DynamicLayout.this.validate();
}
}));
p.add(new JButton(new AbstractAction("Vertical") {
@Override
public void actionPerformed(ActionEvent e) {
DynamicLayout.this.setLayout(V);
DynamicLayout.this.validate();
}
}));
f.add(p,BorderLayout.SOUTH);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new DynamicLayout().display();
}
});
}
}
