我希望有一个窗口,其中有3个菜单,一个绑定在左边,另一个绑定在中间,最后一个绑定在右边。如下图所示:
我遇到的问题是我得到了以下结果:
这里有一些样例代码(可以编译并显示问题):
--------------------------------------------
-toolbar1---------toolbar2---------toolbar3-
--------------------------------------------
- -
- rest of the window does something here -
我遇到的问题是我得到了以下结果:
--------------------------------------------
---------toolbar1toolbar2toolbar3-----------
--------------------------------------------
- -
- rest of the window does something here -
这里有一些样例代码(可以编译并显示问题):
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TestClass extends JFrame {
public TestClass() {
super("test");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
final JPanel upper = new JPanel();
upper.setLayout(new GridBagLayout());
final GridBagConstraints gbc = new GridBagConstraints();
final JButton toolbar1 = new JButton("toolbar1");
final JButton toolbar2 = new JButton("toolbar2");
final JButton toolbar3 = new JButton("toolbar3");
gbc.gridx = 0;
gbc.gridy = 0;
gbc.anchor = GridBagConstraints.WEST;
upper.add(toolbar1, gbc);
gbc.gridx = 1;
gbc.anchor = GridBagConstraints.CENTER;
upper.add(toolbar2, gbc);
gbc.gridx = 2;
gbc.anchor = GridBagConstraints.EAST;
upper.add(toolbar3, gbc);
add(upper, BorderLayout.NORTH);
final JPanel something = new JPanel();
something.setBackground(Color.WHITE);
something.setPreferredSize(new Dimension(600, 600));
something.repaint();
add(something, BorderLayout.CENTER);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
public static void main(String[] args) {
final TestClass test = new TestClass();
}
}
我该如何修复它?我以为通过在GridBagConstraints中设置anchor
来解决问题,但这并没有起作用。