GridBagLayout Java
大家好,我输入了我的原始代码,只是想让大家看看我在为GridBagConstraints讨论什么,我试图将每个图像粘贴到面板的南部,紧挨着彼此GridBagLayout Java,java,swing,gridbaglayout,Java,Swing,Gridbaglayout,大家好,我输入了我的原始代码,只是想让大家看看我在为GridBagConstraints讨论什么,我试图将每个图像粘贴到面板的南部,紧挨着彼此 package prototype; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame;
package prototype;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.WindowConstants;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Image;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
//Declare the class which extends JFrame and
//implements ActionListener to enable bottons to respond whenever clicked or selected
public class Master extends JFrame implements ActionListener {
//create the bottons visible by the user
JButton check = new JButton("");
JButton playList = new JButton("");
JButton update = new JButton("");
JButton quit = new JButton("");
JCheckBox tick = new JCheckBox("Tick");
JPanel top = new JPanel();
public static void main(String[] args) {
//declare object of the class
Master jf = new Master();
}
public Master() {
setLayout(new BorderLayout());
setSize(1050, 400);
setTitle("Master");
// close application only by clicking the quit button
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//show the frame in the middle of the screen when run
setLocationRelativeTo(null);
top.add(new JLabel("Select an option by clicking one of the buttons below"));
add("North", top); // add the text above to the upper part of the frame (North)
JPanel bottom = new JPanel();
bottom.setLayout(new GridBagLayout());
bottom.add(check);
check.addActionListener(this);
bottom.add(playList);
playList.addActionListener(this);
bottom.add(update);
update.addActionListener(this);
bottom.add(quit);
quit.addActionListener(this);
add("South", bottom);
//make the frame non resizable but visible
setResizable(true);
setVisible(true);
try{
Image img = ImageIO.read(getClass().getResource("gui/Exit.png"));
Image resize = img.getScaledInstance(290, 180, 18);
quit.setIcon(new ImageIcon(resize));
img = (bottom, new JLabel("NAME"), 0,0,1,1, GridBagConstraints.SOUTH);
}catch(Exception e){
}
try{
Image img = ImageIO.read(getClass().getResource("gui/Untitled.png"));
Image resize = img.getScaledInstance(290, 180, 18);
check.setIcon(new ImageIcon(resize));
}catch(Exception e){
}
try{
Image img = ImageIO.read(getClass().getResource("gui/CPL.png"));
Image resize = img.getScaledInstance(290, 180, 18);
playList.setIcon(new ImageIcon(resize));
}catch(Exception e){
}
try{
Image img = ImageIO.read(getClass().getResource("gui/UpdateLib.png"));
Image resize = img.getScaledInstance(290, 180, 18);
update.setIcon(new ImageIcon(resize));
}catch(Exception e){
}
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == check) {
new CheckLibrary();
} else if (e.getSource() == update) {
new UpdateLibrary();
} else if (e.getSource() == quit) {
System.exit(0);
} else if (e.getSource() == playList) {
new CreatePlaylist();
}
}
}
为此,您需要使用GridBagConstraints的锚点和权重属性 在下一个示例中,我将JTextField设置为南部:
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class Example extends JFrame {
public Example (){
JTextField f = new JTextField(20);
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.anchor = GridBagConstraints.SOUTHEAST;
c.weighty = 1;
add(f,c);
}
public static void main(String...strings ){
Example e = new Example();
e.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
e.pack();
e.setLocationRelativeTo(null);
e.setVisible(true);
}
}
如果需要按组件填充所有水平空间,请添加下一步:
c.weightx = 1;
c.fill = GridBagConstraints.HORIZONTAL;
对于图像,在我的示例中,您可以使用JLabel而不是JTextField:
JLabel l = new JLabel(new ImageIcon(getClass().getResource(PATH_TO_IMAGE)));
不能将图像直接添加到JPanel。您可以改为将图像设置为JPanel或JLabel的图像图标,并将其添加到您试图制作的任何内容中。???img=南部网格