JPanel mainpanel = new JPanel();
public void addPanel(JPanel panel){
mainpanel.add(panel);
}
addPanel(A);
addPanel(B);
addPanel(C);
addPanel(D);
addPanel(E);
....
JPanel的颜色为MAGENTA :-)
这里是代码：
import java.awt.*;
import javax.swing.*; //swing package
public class GridBagLayoutTest
{
//defining the constructor
public GridBagLayoutTest()
{
JFrame maFrame = new JFrame("The main screen"); //creating main Jframe
maFrame.setLocationByPlatform(true); //centering frame
JPanel headPanel = new JPanel(); //creating the header panel
Container container = maFrame.getContentPane();
container.setLayout(new GridBagLayout()); //setting layout of main frame
GridBagConstraints cns = new GridBagConstraints(); //creating constraint
cns.gridx = 0;
cns.gridy = 0;
//cns.gridwidth = 3;
//cns.gridheight = 4;
cns.weightx = 0.5;
cns.weighty = 0.2;
cns.anchor = GridBagConstraints.FIRST_LINE_START;
cns.fill = GridBagConstraints.BOTH;
headPanel.setBackground(Color.BLUE);
container.add(headPanel, cns);
JPanel panel = new JPanel();
panel.setBackground(Color.CYAN);
cns = new GridBagConstraints();
cns.gridx = 1;
cns.gridy = 0;
//cns.gridwidth = 7;
//cns.gridheight = 4;
cns.weightx = 0.5;
cns.weighty = 0.2;
cns.anchor = GridBagConstraints.FIRST_LINE_END;
cns.fill = GridBagConstraints.BOTH;
container.add(panel, cns);
JPanel panel1 = new JPanel();
panel1.setBackground(Color.RED);
cns = new GridBagConstraints();
cns.gridx = 0;
cns.gridy = 1;
//cns.gridwidth = 2;
cns.gridheight = 2;
cns.weightx = 0.5;
cns.weighty = 0.3;
cns.anchor = GridBagConstraints.LINE_START;
cns.fill = GridBagConstraints.BOTH;
container.add(panel1, cns);
JPanel panel2 = new JPanel();
panel2.setBackground(Color.PINK);
cns = new GridBagConstraints();
cns.gridx = 1;
cns.gridy = 1;
//cns.gridwidth = 2;
//cns.gridheight = 2;
cns.weightx = 0.5;
cns.weighty = 0.2;
cns.anchor = GridBagConstraints.LINE_END;
cns.fill = GridBagConstraints.BOTH;
container.add(panel2, cns);
JPanel panel4 = new JPanel();
panel4.setBackground(Color.ORANGE);
cns = new GridBagConstraints();
cns.gridx = 1;
cns.gridy = 2;
//cns.gridwidth = 2;
//cns.gridheight = 2;
cns.weightx = 0.5;
cns.weighty = 0.2;
cns.anchor = GridBagConstraints.LINE_END;
cns.fill = GridBagConstraints.BOTH;
container.add(panel4, cns);
JPanel mainPanel = new JPanel();
mainPanel.setBackground(Color.WHITE);
mainPanel.setLayout(new GridBagLayout());
cns = new GridBagConstraints();
cns.gridx = 0;
cns.gridy = 4;
cns.gridwidth = 2;
cns.gridheight = 2;
cns.weightx = 1.0;
cns.weighty = 0.3;
cns.anchor = GridBagConstraints.LAST_LINE_START;
cns.fill = GridBagConstraints.BOTH;
container.add(mainPanel, cns);
JPanel panel3 = new JPanel();
panel3.setBackground(Color.MAGENTA);
cns = new GridBagConstraints();
cns.gridx = 0;
cns.gridy = 0;
//cns.gridwidth = 2;
//cns.gridheight = 2;
cns.weightx = 0.5;
cns.weighty = 0.2;
cns.anchor = GridBagConstraints.FIRST_LINE_START;
cns.fill = GridBagConstraints.BOTH;
mainPanel.add(panel3, cns);
JPanel bottomPanel = new JPanel();
bottomPanel.setBackground(Color.WHITE);
cns = new GridBagConstraints();
cns.gridx = 0;
cns.gridy = 1;
//cns.gridwidth = 2;
//cns.gridheight = 2;
cns.weightx = 1.0;
cns.weighty = 0.2;
cns.anchor = GridBagConstraints.LAST_LINE_START;
cns.fill = GridBagConstraints.BOTH;
mainPanel.add(bottomPanel, cns);
//JButton button = new JButton("BUTTON");
//headPanel.add(button);
maFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //setting the default close operation of JFrame
maFrame.pack();
maFrame.setVisible(true); //making the frame visible
}
//defining the main method
public static void main(String[] args)
{
Runnable runnable = new Runnable()
{
public void run()
{
new GridBagLayoutTest(); //instantiating the class
}
};
SwingUtilities.invokeLater(runnable);
}
}
/* B1 Space B2 Space B3 Space B4 */
String col1 = "10dlu, 3dlu, 10dlu, 3dlu 10dlu, 3dlu, 10ldu";
/*Width of button */
String row1 = "5dlu";
FormLayout layout = new FormLayout( col1, row1);
JPanel panel = new JPanel(layout);
panel.setBorder(Borders.DIALOG_BORDER);
CellConstraints cc = new CellConstraints();
/* X - stands for column position :: Y - stand for row */
panel.add(new JButton("B1"), cc.xy(1, 1));
panel.add(new JButton("B2"), cc.xy(2, 1));
.
.
.
there is one more cc.xyh(1,1,2) where 'h' stands for vertical span or width.
是的，你可以去JGoodies网站了解更多关于表单布局的信息，“DLU”意味着对话框单位，而不是我来解释所有这些。请下载该库和文档。相信我，这个布局管理器在可用性、可维护性和可读性方面都要好得多。
我认为，首先创建一个临时的面板来处理ACF，然后再创建一个来处理BDE，接着再创建一个面板将ACF和BDE组合起来，最后将这个临时面板和你的主要面板添加到边界布局的NORTH和SOUTH上。
取决于窗口调整大小时的行为。但是你无法避免使用JPanels构建树形结构。
顶部组件可以具有BorderLayout，其中North区域有一个面板，中心区域有一个主面板。
North面板将具有X轴BoxLayout，并包含两个面板。
这两个面板都应该具有Y轴BoxLayout，第一个面板将包含A、C、F，第二个面板将包含B、D、E。
您还应该为A、B、C、D、E和F设置首选大小，以便它们以适当的大小呈现。
编辑：
这里，我创建了一个示例：
public class GladysPanel extends JPanel
{
public GladysPanel(JComponent A, JComponent B, JComponent C, JComponent D, JComponent E, JComponent F, JComponent main){
super(new BorderLayout());
JPanel abcdef = new JPanel(new BorderLayout());
Box ab = new Box(BoxLayout.X_AXIS);
ab.add(A);
ab.add(B);
abcdef.add(ab, BorderLayout.NORTH);
Box cdef = new Box(BoxLayout.X_AXIS);
Box cf = new Box(BoxLayout.Y_AXIS);
cf.add(C);
cf.add(F);
cf.add(Box.createVerticalGlue());
Box de = new Box(BoxLayout.Y_AXIS);
de.add(D);
de.add(E);
de.add(Box.createVerticalGlue());
cdef.add(cf, BorderLayout.WEST);
cdef.add(de, BorderLayout.EAST);
abcdef.add(cdef);
add(abcdef, BorderLayout.NORTH);
add(main);
}
public static void main(String[] args){
JPanel A = new JPanel();
A.setOpaque(true);
A.setBackground(Color.BLUE);
A.add(new JLabel("A"));
JPanel B = new JPanel();
B.setOpaque(true);
B.setBackground(Color.LIGHT_GRAY);
B.add(new JLabel("B"));
JPanel C = new JPanel();
C.setPreferredSize(new Dimension(0, 100));
C.setOpaque(true);
C.setBackground(Color.RED);
C.add(new JLabel("C"));
JPanel D = new JPanel();
D.setOpaque(true);
D.setBackground(Color.PINK);
D.add(new JLabel("D"));
JPanel E = new JPanel();
E.setOpaque(true);
E.setBackground(Color.YELLOW);
E.add(new JLabel("E"));
E.setPreferredSize(new Dimension(0, 60));
JPanel F = new JPanel();
F.setOpaque(true);
F.setBackground(Color.MAGENTA);
F.add(new JLabel("F"));
JPanel main = new JPanel();
main.setOpaque(true);
main.setBackground(Color.WHITE);
main.add(new JLabel("main"));
GladysPanel panel = new GladysPanel(A, B, C, D, E, F, main);
JFrame example = new JFrame("Gladys example");
example.setContentPane(panel);
example.setSize(300, 300);
example.setVisible(true);
}
}
你可以省略setPreferredSize()，我只是添加它来演示行为。你也可以尝试调整窗口大小。使用这段代码比使用GridBagLayout要短得多。
setPreferredSize()；在pack()后让内容决定大小。 - trashgod