大家好,当我按下按钮时,如何切换或更改 GridBagLayout 的所有 JButton?似乎卡住了。它不会取代旧的.....请帮助我......我尝试了 repaint()、revalidate() 但“叹息”它只是行不通。请纠正我。
package gridlayoutjumper;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class GridLayoutJumper extends JFrame implements ActionListener{
JFrame timeTableFrame = new JFrame("Helo");
JPanel timeTablePnl = new JPanel(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
JButton jb1 = new JButton("Jbutton1");
JButton jb4 = new JButton("Change");
JButton jb3 = new JButton("Jbutton3");
JButton jb2 = new JButton("Jbutton2");
public GridLayoutJumper(){
}
public void newLayout1(){
System.out.println("newLayout1 executed");
JButton jb5 = new JButton("Jbutton5");
JButton jb6 = new JButton("Jbutton6");
JButton jb7 = new JButton("Jbutton7");
c.gridx = 0;
c.gridy = 0;
c.weightx = 1;
c.weighty = 1;
c.insets = new Insets(0, 15, 0, 15);
timeTablePnl.add(jb5, c);
c.gridx = 1;
c.gridy = 0;
c.weightx = 1;
c.weighty = 1;
c.insets = new Insets(0, 15, 0, 15);
timeTablePnl.add(jb6, c);
c.gridx = 0;
c.gridy = 1;
c.weightx = 1;
c.weighty = 1;
c.insets = new Insets(0, 15, 0, 15);
timeTablePnl.add(jb7, c);
timeTablePnl.validate();
timeTablePnl.repaint();
}
public void createComponent(){
timeTableFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
timeTableFrame.setPreferredSize(new Dimension(500, 500));
timeTableFrame.setMinimumSize(new Dimension(500, 500));
timeTableFrame.add(timeTablePnl);
c.gridx = 0;
c.gridy = 0;
c.weightx = 1;
c.weighty = 1;
c.insets = new Insets(0, 15, 0, 15);
timeTablePnl.add(jb1, c);
c.gridx = 1;
c.gridy = 0;
c.weightx = 1;
c.weighty = 1;
c.insets = new Insets(0, 15, 0, 15);
timeTablePnl.add(jb2, c);
c.gridx = 0;
c.gridy = 1;
c.weightx = 1;
c.weighty = 1;
c.insets = new Insets(0, 15, 0, 15);
timeTablePnl.add(jb3, c);
c.gridx = 1;
c.gridy = 1;
c.weightx = 1;
c.weighty = 1;
c.insets = new Insets(0, 15, 0, 15);
timeTablePnl.add(jb4, c);
jb4.addActionListener(this);
timeTableFrame.setVisible(true);
}
@Override
public void actionPerformed(ActionEvent e){
Object source = e.getSource();
if(source == jb4){
System.out.println("Gotcha");
newLayout1();
}
}
public static void main(String[] args) {
GridLayoutJumper x = new GridLayoutJumper();
x.createComponent();
}
}