GridBagLayout如
该答案中所建议的那样，可以为左部分提供所需的全部控制。如果您愿意为简单起见而牺牲一些控制权，则可以
FlowLayout在a里面放两个面板
GridLayout：
import java.awt.BorderLayout;import java.awt.GridLayout;import javax.swing.JButton;import javax.swing.JCheckBox;import javax.swing.Jframe;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;class Grid extends Jframe{ private JTextField t1, t2; private JCheckBox c1, c2; private JButton b1, b2, b3; private JPanel topPanel, bottomPanel; private JPanel eastPanel, centerPanel; private JLabel l1, l2; public Grid() { c1 = new JCheckBox("Snap to Grid"); l1 = new JLabel("X:"); t1 = new JTextField("8",3); topPanel = new JPanel();//uses flow layout by default topPanel.add(c1); topPanel.add(l1); topPanel.add(t1); c2 = new JCheckBox("Show Grid"); l2 = new JLabel("Y:"); t2 = new JTextField("8",3); bottomPanel = new JPanel(); bottomPanel.add(c2); bottomPanel.add(l2); bottomPanel.add(t2); centerPanel = new JPanel(new GridLayout(2,1)); centerPanel.add(topPanel); centerPanel.add(bottomPanel); add(centerPanel,BorderLayout.CENTER); b1 = new JButton("Ok"); b2 = new JButton("Cancel"); b3 = new JButton("Help"); eastPanel = new JPanel(new GridLayout(3,1)); eastPanel.add(b1); eastPanel.add(b2); eastPanel.add(b3); add(eastPanel, BorderLayout.EAST); } public static void main(String[] args) { Grid app = new Grid(); app.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE); app.setSize(300,150); app.setVisible(true); }}
