我试图在我的按钮之间添加一些空间是徒劳的,我尝试过很多技巧,比如emptyBorder或者胶水,但是我没能成功 . 另外我无法解释“Next”和“Previous”上的白色边框,所以我无法删除它
这就是我所拥有的:
这是一个可运行的片段:
package gridspace;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class GridSpace extends JPanel {
public static void main(String[] args) {
GridSpace test = new GridSpace();
}
public GridSpace() {
JFrame frame = new JFrame();
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setLayout(new BorderLayout());
JPanel firstPanel = new JPanel();
JPanel buttonPanel = new JPanel(new GridLayout(5, 4));
JPanel buttonPanelOption = new JPanel();
firstPanel.setBackground(Color.RED);
firstPanel.setLayout(new GridBagLayout());
JButton button[] = new JButton[20];
JButton buttonNext = new JButton("Next");
JButton buttonPrevious = new JButton("Previous");
GridBagConstraints c = new GridBagConstraints();
Insets insets = new Insets(10, 10, 10, 10);
c.insets = insets;
c.weightx = 1;
c.gridwidth = 30;
buttonNext.setPreferredSize(new Dimension(100, 20));
buttonPrevious.setPreferredSize(new Dimension(100, 20));
for (int i = 0; i < 20; i++) {
button[i] = new JButton(Integer.toString(i + 1));
buttonPanel.add(button[i]);
}
c.gridx = 3;
c.gridy = 0;
firstPanel.add(buttonPanel, c);
buttonPanelOption.add(buttonPrevious);
buttonPanelOption.add(buttonNext);
c.gridx = 3;
c.gridy = 1;
firstPanel.add(buttonPanelOption, c);
frame.getContentPane().add(firstPanel);
frame.pack();
}
}
1 回答
这与GridBagLayout无关 . 而是改进GridLayout构造函数调用 . 更改:
至
关于:
那是因为持有它的JPanel是不透明的 . 将其设置为非不透明,主容器的背景颜色显示出来 .
例如: