スイングレイアウトのベストプラクティス

// 创建主面板
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BorderLayout());

// 创建顶部面板
JPanel topPanel = new JPanel();
topPanel.setLayout(new FlowLayout());
JLabel titleLabel = new JLabel("标题");
topPanel.add(titleLabel);

// 创建中间面板
JPanel middlePanel = new JPanel();
middlePanel.setLayout(new GridLayout(2, 2));
JButton button1 = new JButton("按钮1");
middlePanel.add(button1);
JButton button2 = new JButton("按钮2");
middlePanel.add(button2);
JButton button3 = new JButton("按钮3");
middlePanel.add(button3);
JButton button4 = new JButton("按钮4");
middlePanel.add(button4);

// 创建底部面板
JPanel bottomPanel = new JPanel();
bottomPanel.setLayout(new FlowLayout());
JButton okButton = new JButton("确定");
bottomPanel.add(okButton);
JButton cancelButton = new JButton("取消");
bottomPanel.add(cancelButton);

// 将面板添加到主面板
mainPanel.add(topPanel, BorderLayout.NORTH);
mainPanel.add(middlePanel, BorderLayout.CENTER);
mainPanel.add(bottomPanel, BorderLayout.SOUTH);

// 创建主面板
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new GridBagLayout());

// 创建布局约束
GridBagConstraints constraints = new GridBagConstraints();

// 创建组件
JLabel nameLabel = new JLabel("姓名:");
JTextField nameField = new JTextField();
JLabel ageLabel = new JLabel("年龄:");
JTextField ageField = new JTextField();

// 设置布局约束和填充
constraints.gridx = 0;
constraints.gridy = 0;
constraints.anchor = GridBagConstraints.EAST;
constraints.insets = new Insets(5, 5, 5, 5);
mainPanel.add(nameLabel, constraints);

constraints.gridx = 1;
constraints.gridy = 0;
constraints.anchor = GridBagConstraints.WEST;
mainPanel.add(nameField, constraints);

constraints.gridx = 0;
constraints.gridy = 1;
constraints.anchor = GridBagConstraints.EAST;
mainPanel.add(ageLabel, constraints);

constraints.gridx = 1;
constraints.gridy = 1;
constraints.anchor = GridBagConstraints.WEST;
mainPanel.add(ageField, constraints);