我试图创建一个密码库，但是每当我尝试运行它时，JTextField都非常小，JTable覆盖了面板。
我尝试使用GridBag的尺寸和位置，但没有任何效果。
这是给我的IB计算机科学IA的。任何帮助都会很棒。
JFrame passwordVault;
JTable passwordTable;
Object[] columnNames = {"Name of Application", "Application Password", "Description"};
JTextField appName, appPass, appDesc;
JButton add, delete, update;
JLabel nameOfApp, passOfApp, descOfApp;
passwordVault = new JFrame("Password Vault");
passwordTable = new JTable();
JPanel passwordPanel = new JPanel();
DefaultTableModel tableModel = new DefaultTableModel();
tableModel.setColumnIdentifiers(columnNames);
passwordTable.setModel(tableModel);
nameOfApp = new JLabel("App Name: ");
passOfApp = new JLabel("App Password: ");
descOfApp = new JLabel("Description: ");
appName = new JTextField();
appPass = new JTextField();
appDesc = new JTextField();
add = new JButton("Add");
delete = new JButton("Delete");
update = new JButton("Update");
appName.setBounds(400, 220, 100, 25);
appPass.setBounds(400, 250, 100, 25);
appDesc.setBounds(400, 280, 100, 25);
add.setBounds(530, 220, 100, 25);
update.setBounds(530, 250, 100, 25);
delete.setBounds(530, 280, 100, 25);
JScrollPane scrollPane = new JScrollPane(passwordTable);
scrollPane.setBounds(0, 0, 1000, 200);
passwordVault.add(scrollPane);
passwordPanel.add(add);
passwordPanel.add(update);
passwordPanel.add(delete);
passwordPanel.setLayout(new GridBagLayout());
passwordPanel.add(nameOfApp, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(appName, new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(passOfApp, new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(appPass, new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(descOfApp, new GridBagConstraints(0, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(appDesc, new GridBagConstraints(2, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(add, new GridBagConstraints(3, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(update, new GridBagConstraints(4, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(delete, new GridBagConstraints(5, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordVault.add(passwordPanel);
passwordVault.setSize(1000,500);
passwordVault.setLocationRelativeTo(null);
passwordVault.setVisible(true);
答案 0 :(得分：1)
这是程序的编辑版本，它按照我认为的方式格式化布局：
JFrame passwordVault;
JTable passwordTable;
Object[] columnNames = {"Name of Application", "Application Password", "Description"};
JTextField appName, appPass, appDesc;
JButton add, delete, update;
JLabel nameOfApp, passOfApp, descOfApp;
passwordVault = new JFrame("Password Vault");
passwordTable = new JTable();
JPanel passwordPanel = new JPanel();
DefaultTableModel tableModel = new DefaultTableModel();
tableModel.setColumnIdentifiers(columnNames);
passwordTable.setModel(tableModel);
nameOfApp = new JLabel("App Name: ");
passOfApp = new JLabel("App Password: ");
descOfApp = new JLabel("Description: ");
appName = new JTextField();
appPass = new JTextField();
appDesc = new JTextField();
add = new JButton("Add");
delete = new JButton("Delete");
update = new JButton("Update");
// Used setPreferredSize and setLocation instead of setBounds
appName.setLocation(new Point(400, 220));
appName.setPreferredSize(new Dimension(100, 25));
appPass.setLocation(new Point(400, 250));
appPass.setPreferredSize(new Dimension(100, 25));
appDesc.setLocation(new Point(400, 280));
appDesc.setPreferredSize(new Dimension(100, 25));
add.setLocation(new Point(530, 220));
add.setPreferredSize(new Dimension(100, 25));
update.setLocation(new Point(530, 250));
update.setPreferredSize(new Dimension(100, 25));
delete.setLocation(new Point(530, 280));
delete.setPreferredSize(new Dimension(100, 25));
JScrollPane scrollPane = new JScrollPane(passwordTable);
scrollPane.setBounds(0, 0, 1000, 200);
// Create a JPanel to contain the scrollPane and passwordPanel
JPanel framePanel = new JPanel();
framePanel.setLayout(new GridLayout(2, 1));
framePanel.add(scrollPane);
passwordPanel.setLayout(new GridBagLayout());
passwordPanel.add(nameOfApp, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(appName, new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(passOfApp, new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(appPass, new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(descOfApp, new GridBagConstraints(0, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(appDesc, new GridBagConstraints(1, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(add, new GridBagConstraints(0, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(update, new GridBagConstraints(1, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
passwordPanel.add(delete, new GridBagConstraints(2, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
framePanel.add(passwordPanel);
// Add the framePanel (which contains the other 2 panels) to the JFrame
passwordVault.add(framePanel);
passwordVault.setSize(1000,500);
passwordVault.setLocationRelativeTo(null);
passwordVault.setVisible(true);
因此，主要更改是：
setPreferredSize和setLocation，而不是setBounds和JTextField的{{1}} JButton（称为JPanel）以包含framePanel和scrollPane，然后将passwordPanel添加到framePanel 通过创建主JFrame而不是仅向JFrame本身添加多个JPanel来帮助组织JPanel中的不同元素。这样，一个主JFrame决定了框架的整体布局。