我是Java新手，我很难理解GridBag-Layout。我只想做的是将按钮 1 的大小调整为三个按钮的宽度。这意味着按钮 1 从坐标 x=0，y=0 开始，在按钮 3 的末尾上方结束 （x=0，y=3）。
代码如下：
package footballQuestioner;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
public class asd {
public static void main(String[] args) {
JFrame frame = new Houdini();
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// frame.setSize(250, 250);
System.out.println(frame.getWidth());
frame.setResizable(true);
frame.pack();
frame.setVisible(true);
}
}
class Houdini extends JFrame {
private JButton one=new JButton("one");
private JButton two=new JButton("two");
private JButton three=new JButton("three");
private JButton four=new JButton("four");
private JButton five=new JButton("five");
private GridBagConstraints gbc=new GridBagConstraints();
private JPanel panel=new JPanel(new GridBagLayout());
public Houdini() {
// Insets insets=new Insets(30, 0, 30, 0);
// gbc.insets=insets;
gbc.gridx=0;
gbc.gridy=0;
gbc.gridwidth=1;
gbc.gridheight=1;
gbc.fill=0;
panel.add(one,gbc);
gbc.gridx=1;
gbc.gridy=1;
gbc.gridwidth=1;
gbc.gridheight=1;
gbc.fill=0;
panel.add(two,gbc);
gbc.gridx=2;
gbc.gridy=2;
gbc.gridwidth=1;
gbc.gridheight=2;
gbc.fill=0;
panel.add(three,gbc);
// gbc.gridx=3;
// gbc.gridy=3;
//
// gbc.gridwidth=-4;
// gbc.gridheight=1;
//
//
// gbc.fill=GridBagConstraints.HORIZONTAL;
//
// panel.add(four,gbc);
panel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
add(panel);
}
}
它应该是这样的：
你的意思更像。。。
我用过的。。。
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridwidth = 3;
gbc.gridheight = 1;
gbc.fill = 0;
panel.add(one, gbc);
或者
我用过的。。。
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridwidth = 3;
gbc.gridheight = 1;
gbc.fill = GridBagConstraints.HORIZONTAL;
panel.add(one, gbc);
实现？
已更新
问题是，从GridBagLayout的角度来看，列0没有宽度。。。这就是它被压缩的原因。。。
您需要做的是在列中添加某种填充组件，这将导致它在其中添加空间。。。
例如
更新了作弊
根据你想要达到的目标，你也可以作弊；)
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridBagConstraints;
import java.awt.GridLayout;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TestLayout {
public static void main(String[] args) {
JFrame frame = new Houdini();
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// frame.setSize(250, 250);
System.out.println(frame.getWidth());
frame.setResizable(true);
frame.pack();
frame.setVisible(true);
}
public static class Houdini extends JFrame {
private JButton one = new JButton("one");
private JButton two = new JButton("two");
private JButton three = new JButton("three");
private JButton four = new JButton("four");
private JButton five = new JButton("five");
private GridBagConstraints gbc = new GridBagConstraints();
private JPanel panel = new JPanel(new BorderLayout());
public Houdini() {
JPanel top = new JPanel(new BorderLayout());
top.add(one);
JPanel center = new JPanel(new GridLayout(0, 3));
center.add(empty());
center.add(two);
center.add(empty());
center.add(empty());
center.add(empty());
center.add(three);
panel.add(top, BorderLayout.NORTH);
panel.add(center);
panel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
add(panel);
}
private JComponent empty() {
JPanel panel = new JPanel();
return panel;
}
}
}
