关于GridBagLayout的问题。

表示图片看不到，GridBagLayout在Java核心技术卷一中有详细介绍，在Java核心技术卷一的P360页，还有一个封装好的GBC类来简化这个布局的使用，楼主可以看看

我写了一个，用的就是GBCGBC.javaimport java.awt.*;/**
* This class simplifies the use of the GridBagConstraints class.
* @version 1.01 2004-05-06
* @author Cay Horstmann
*/
public class GBC extends GridBagConstraints
{
   /**
    * Constructs a GBC with a given gridx and gridy position and all other grid
    * bag constraint values set to the default.
    * @param gridx the gridx position
    * @param gridy the gridy position
    */
   public GBC(int gridx, int gridy)
   {
      this.gridx = gridx;
      this.gridy = gridy;
   }   /**
    * Constructs a GBC with given gridx, gridy, gridwidth, gridheight and all
    * other grid bag constraint values set to the default.
    * @param gridx the gridx position
    * @param gridy the gridy position
    * @param gridwidth the cell span in x-direction
    * @param gridheight the cell span in y-direction
    */
   public GBC(int gridx, int gridy, int gridwidth, int gridheight)
   {
      this.gridx = gridx;
      this.gridy = gridy;
      this.gridwidth = gridwidth;
      this.gridheight = gridheight;
   }   /**
    * Sets the anchor.
    * @param anchor the anchor value
    * @return this object for further modification
    */
   public GBC setAnchor(int anchor)
   {
      this.anchor = anchor;
      return this;
   }   /**
    * Sets the fill direction.
    * @param fill the fill direction
    * @return this object for further modification
    */
   public GBC setFill(int fill)
   {
      this.fill = fill;
      return this;
   }   /**
    * Sets the cell weights.
    * @param weightx the cell weight in x-direction
    * @param weighty the cell weight in y-direction
    * @return this object for further modification
    */
   public GBC setWeight(double weightx, double weighty)
   {
      this.weightx = weightx;
      this.weighty = weighty;
      return this;
   }   /**
    * Sets the insets of this cell.
    * @param distance the spacing to use in all directions
    * @return this object for further modification
    */
   public GBC setInsets(int distance)
   {
      this.insets = new Insets(distance, distance, distance, distance);
      return this;
   }   /**
    * Sets the insets of this cell.
    * @param top the spacing to use on top
    * @param left the spacing to use to the left
    * @param bottom the spacing to use on the bottom
    * @param right the spacing to use to the right
    * @return this object for further modification
    */
   public GBC setInsets(int top, int left, int bottom, int right)
   {
      this.insets = new Insets(top, left, bottom, right);
      return this;
   }   /**
    * Sets the internal padding
    * @param ipadx the internal padding in x-direction
    * @param ipady the internal padding in y-direction
    * @return this object for further modification
    */
   public GBC setIpad(int ipadx, int ipady)
   {
      this.ipadx = ipadx;
      this.ipady = ipady;
      return this;
   }
}
TestFrame.javaimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class TestFrame extends JFrame
{
private JTree tree = new JTree();
private JTextArea taText = new JTextArea();
private JTextField tfText = new JTextField();
private JButton btnAdd = new JButton("添加");
private JButton btnDel = new JButton("删除");
private JButton btnChange = new JButton("修改");
private JButton btnClearAll = new JButton("清除全部");
private JLabel lbl = new JLabel("这里有个JLabel");

public TestFrame()
{
this.setLayout(new GridBagLayout());

add(new JScrollPane(tree), new GBC(0, 0, 1, 2).setFill(GBC.BOTH).setWeight(1, 1));
add(taText, new GBC(1, 0).setFill(GBC.BOTH).setWeight(1, 1));

JPanel panel = new JPanel(new GridBagLayout());
panel.add(tfText, new GBC(0, 0, 4, 1).setFill(GBC.HORIZONTAL));
panel.add(btnAdd, new GBC(0, 1).setAnchor(GBC.CENTER));
panel.add(btnDel, new GBC(1, 1).setAnchor(GBC.CENTER));
panel.add(btnChange, new GBC(2, 1).setAnchor(GBC.CENTER));
panel.add(btnClearAll, new GBC(3, 1).setAnchor(GBC.CENTER));
panel.add(lbl, new GBC(0, 2, 4, 1).setFill(GBC.HORIZONTAL).setWeight(1, 1));
add(panel, new GBC(1, 1));
}

public static void main(String[] args)
{
JFrame frame = new TestFrame();
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

谢谢6楼的代码，但是我对
gridx
gridy
gridwidth
gridheight
fill
anchor
weightx
weighty
ipadx
ipady
的作用还是不理解，API上面的解释太抽象，我都看不懂。您能帮我解释一下吗？或者有相关方面的资料推荐一下，谢谢你。

GridBagLayout把一个界面分为m行n列的网格gridx表示组件位于第几列，gridy表示组件位于第几行
gridwidth表示组件占几列，gridheight表示组件占几行
fill指定当组件小于单元格大小时的填充方式
anchor表示当组件小于单元格大小时的对齐方式
weighx表示当界面有收缩放大时，组件的宽度收缩放大的程度，weighty表示组件高度收缩放大的程度
ipadx表示组件最小的宽度，ipady表示组件最小的高度如果还是有疑问，可以从网上下《Java核心技术》卷一的电子书，看看里面关于GridBagLayout的详细介绍，我用的GBC也是从它那里拷贝过来的

我看了Java核心技术卷，对这些用法明白了不少，谢谢你。

调试易

关于GridBagLayout的问题。

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