另一个内部有多个JPanel

Question

look here I have to make a format like this, like make a 1,2 panel, then put a 3,1 panel on the left side. Then, I put 4 text fields in the middle left panel and one button in the bottom left panel.

I'm not sure if I can just use GridLayout or if I have to use BorderLayout too.

How can I get this organized because when I set it up, I can't get the layout right. The textfields are not in the right position, they end up on the right side.

 public class CreatePanel extends JPanel { private Vector projectList; private JButton button1; private ProjectSpendingPanel spendingPanel; private JFrame frame1; JPanel panel1; JPanel leftPanel; JPanel subPanel; GridLayout layout1; BorderLayout layout2; GridLayout layout3; JLabel message; JLabel labelName; JLabel labelNumber; JLabel labelLocation; JLabel labelFunding; JTextField textField1; JTextField textField2; JTextField textField3; JTextField textField4; //Constructor initializes components and organize them using certain layouts public CreatePanel(Vector projectList, ProjectSpendingPanel spendingPanel) { this.projectList = projectList; this.spendingPanel = spendingPanel; //organize components here layout1 = new GridLayout(1,2); layout2 = new BorderLayout(1,3); layout3 = new GridLayout(4,2); this.setLayout(layout1); panel1 = new JPanel(layout1); leftPanel = new JPanel(layout3); subPanel = new JPanel(layout2); add(panel1); panel1.add(subPanel); panel1.add(leftPanel); labelName = new JLabel("Project Name"); leftPanel.add(labelName); textField1 = new JTextField("", 15); leftPanel.add(textField1,BorderLayout.SOUTH); labelName = new JLabel("Project Number"); leftPanel.add(labelName); textField2 = new JTextField("",15); leftPanel.add(textField2); labelLocation = new JLabel("Project Location"); leftPanel.add(labelLocation); textField3 = new JTextField("",15); leftPanel.add(textField3); labelFunding = new JLabel("Initial Funding"); leftPanel.add(labelFunding); textField4 = new JTextField("",15); leftPanel.add(textField4); add(leftPanel); button1 = new JButton("Create a project"); subPanel.add(button1,BorderLayout.SOUTH); } 

Answer 1

To get the result you probably intended, you need to tweak your code just a little.

Your lines

panel1 = new JPanel(layout1);
leftPanel = new JPanel(layout3);
subPanel = new JPanel(layout2);

should be altered to read

panel1 = new JPanel(new GridLayout(2, 1));
leftPanel = new JPanel(layout3);
subPanel = new JPanel(layout2);

GridLayout takes rows first, then columns. Your layout1 defines one row and two columns but you use it for the text fields and the button, so I assume the two panels need to be above each other.

Second, you need to change the order from

add(panel1);
panel1.add(subPanel);
panel1.add(leftPanel);

to

add(panel1);
panel1.add(leftPanel);
panel1.add(subPanel);

Finally, I think you need to change

add(leftPanel);
button1 = new JButton("Create a project");

to

add(spendingPanel);
button1 = new JButton("Create a project");

Adding leftPanel again seems to destroy the layout. If you do not want to see your spendingPanel here, you could use new JPanel() instead.

Here is a screenshot of the running program