Java GUI GridBagLayout 如何在一列中容纳三个组合框？

Question

I am using Eclipse, programming in Java, using GridBagLayout layout manager for a school project.

So far it looks like this

I wanna put the three combo box (MM, DD, YYYY) in one column(aligned with accNoT and others) but I don't know how I tried tinkering with weightx or weighty but I doesn't do anything

Here's the code to that portion

c.fill = GridBagConstraints.HORIZONTAL;
//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 0;
c.ipadx = 50;
pane.add(accNoT, c);

c.fill = GridBagConstraints.HORIZONTAL;
//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 1;
pane.add(cellNoT, c);



c.fill = GridBagConstraints.HORIZONTAL;
c.weighty = 0.3;
c.gridx = 1;
c.gridy = 2;
pane.add(monthBox, c);

c.fill = GridBagConstraints.HORIZONTAL;
c.weighty = 0.3;

c.gridx = 2;
c.gridy = 2;
pane.add(dayBox, c);

c.fill = GridBagConstraints.HORIZONTAL;
c.weighty = 0.3;
c.gridx = 3;
c.gridy = 2;
pane.add(yearBox, c);

c.fill = GridBagConstraints.HORIZONTAL;
//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 3;
pane.add(planList, c);

I added some text in the image so it won't be a bit confusing ps. I am following https://docs.oracle.com/javase/tutorial/uiswing/layout/gridbag.html I just modified their example

So far what I did besides trying to figure out weightx and y which up till now I still don't understand I put the DD and YYYY combo box in different column Then I set some gridWidth to accNoT equals to 2 but it didn't work, the DD just disappeared

Answer 1

ANSWERED THANK YOU SO MUCH user85421/////////////////////////////

Just like user85421 said in the comments, add gridwidth the three combo box should be 1, then the rest should be 3

The code

  c.fill = GridBagConstraints.HORIZONTAL;

//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 0;
c.ipadx = 50;
c.gridwidth = 3;
pane.add(accNoT, c);

c.fill = GridBagConstraints.HORIZONTAL;

//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 1;
c.gridwidth = 3;

pane.add(cellNoT, c);



c.fill = GridBagConstraints.HORIZONTAL;


c.gridx = 1;
c.gridy = 2;
c.gridwidth = 1;

pane.add(monthBox, c);

c.fill = GridBagConstraints.HORIZONTAL;

//c.weighty = 0.3;

c.gridx = 2;
c.gridy = 2;
c.gridwidth = 1;
pane.add(dayBox, c);

c.fill = GridBagConstraints.HORIZONTAL;

//c.weighty = 0.3;
c.gridx = 3;
c.gridy = 2;
c.gridwidth = 1;
pane.add(yearBox, c);

c.fill = GridBagConstraints.HORIZONTAL;

//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 3;
c.gridwidth = 3;
pane.add(planList, c);

c.fill = GridBagConstraints.HORIZONTAL;

//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 4;
c.gridwidth = 3;
pane.add(adjT, c);

c.fill = GridBagConstraints.HORIZONTAL;

//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 5;
c.gridwidth = 3;
pane.add(eUsageT, c);

c.fill = GridBagConstraints.HORIZONTAL;
//c.weightx = 0.5;
c.gridx = 1;
c.gridy = 6;
c.gridwidth = 3;
pane.add(prevBAT, c);

////THIRD COLUMN//////////////////////////////////////////
c.fill = GridBagConstraints.HORIZONTAL;
//c.weightx = 0.5;
c.gridx = 4;
c.gridy = 1;
c.gridwidth = 3;
pane.add(monPLR, c);

The result

Yes it looks hideous but at least the three combo box fits in a column

You might notice in the "Third column" section The gridy = 4 That's because the YYYY combo box's gridy = 3

Once Again thank you user85421 for saving our group's lives