求教一个布局管理器GridBagLayout的问题

Question

我在JPANEL中用GridBagLayout布局管理器，使用间距insets怎么没效果？

Answer 1

Jpanel里面直接使用绝对布局来解决。
insets这个方法我没用过。楼主如果有例子可以发一下，我挺喜欢看些GUI内容的。

Answer 2

class calButton extends JButton
{
Font f=new Font("仿宋",Font.BOLD,25);
public calButton(String title,Color cl)
{
super(title);
setBackground(cl);
setPreferredSize(new Dimension(37,32));
setFont(f);
setFocusable(false);
}
}
class myCanvas extends JPanel implements ActionListener  {
Color cl=new Color(216,230,230);
calButton cbMl=new calButton("MC",cl);
calButton cbMr=new calButton("MR",cl);
calButton cbMs=new calButton("MS",cl);
calButton cbMa=new calButton("M+",cl);
calButton cbMc=new calButton("M-",cl);
         JTextField jtf=new JTextField(".0",32);
       public myCanvas()
{

init();

this.setVisible(true);
}

public void init()
{
GridBagLayout gbg=new GridBagLayout();
GridBagConstraints gc=new GridBagConstraints();
jtf.setBackground(Color.red);
jtf.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
jtf.setHorizontalAlignment(JTextField.RIGHT);
this.setLayout(gbg);
this.add(jtf);
this.add(cbMl);
this.add(cbMr);
this.add(cbMs);
this.add(cbMa);
this.add(cbMc);
gc.gridx=0;
        gc.gridy=0;
        gc.gridheight=10;
        gc.gridwidth=20;
        gc.insets=new Insets(1,2,0,2);
        gbg.setConstraints(jtf, gc); gc.gridx=0;
gc.gridy=10;
gc.gridwidth=4;
gc.gridheight=4;
gc.insets=new Insets(1,2,0,2);
gbg.setConstraints(cbMl, gc);
gc.gridx=4;
gc.gridy=10;
gc.gridwidth=4;
gc.gridheight=4;
gc.insets=new Insets(1,2,0,2);
gbg.setConstraints(cbMr, gc);
gc.gridx=8;
gc.gridy=10;
gc.gridwidth=4;
gc.gridheight=4;
gc.insets=new Insets(1,2,0,2);
gbg.setConstraints(cbMs, gc);
gc.gridx=12;
gc.gridy=10;
gc.gridwidth=4;
gc.gridheight=4;
       gc.insets=new Insets(1,2,0,2);
       gbg.setConstraints(cbMa, gc);
       gc.gridx=16;
       gc.gridy=10;
       gc.gridwidth=4;
       gc.gridheight=4;
       gc.insets=new Insets(1,2,0,2);
       gbg.setConstraints(cbMc, gc);

}
以上是我写的继承JPANEL类代码，把它实例化加入窗体后，设置Insets都没什么改变