/** * baidu :组件不会直接放到框架上，而是放在若干个面板上，这些面板再放到窗格上? * 实际上在JFrame上可直接添加Jbutton * * BorderLayoutFlowLayoutGridLayoutGridBagLayoutCardLayoutBoxLayout* * GridBagLayout稍复杂，主要看BoxLayout、BorderLayout */package layoutmanager;import java.awt.BorderLayout;import java.awt.Button;import java.awt.CardLayout;import java.awt.FlowLayout;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.GridLayout;import java.awt.Label;import java.awt.Panel;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.table.DefaultTableModel;/** * * @author Albert Li */public class LayoutManager { JFrame mJFrame = new JFrame(); public void InitGridLayout(){ mJFrame.setTitle("GridLayout"); mJFrame.setLayout(new GridLayout(3,3,5,5)); for(int i=1; i<10; i++){ JButton mJButton = new JButton(String.valueOf(i)); mJFrame.add(mJButton); } mJFrame.setBounds(300, 300, 300, 300); mJFrame.setVisible(true); mJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void InitFlowLayout(){ mJFrame.setTitle("FlowLayout"); mJFrame.setLayout(new FlowLayout(5, 10, 10)); for(int i=1; i<10; i++){ JButton mJButton = new JButton(String.valueOf(i)); mJFrame.add(mJButton); } mJFrame.setBounds(300, 300, 300, 300); mJFrame.setVisible(true); mJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } Panel pnlCommandArea = new Panel(); Panel pnlDisplayArea = new Panel(); CardLayout mCardLayout = new CardLayout(); JButton mjButton = new JButton("Command"); public void InitCardLayout(){ mJFrame.setTitle("CardLayout"); mJFrame.setLayout(new BorderLayout(10,10)); pnlDisplayArea.setLayout(mCardLayout); Panel pnlFirst = new Panel(); Panel pnlSed = new Panel(); Panel pnlThird = new Panel(); pnlFirst.add(new Label("first")); pnlSed.add(new Label("second")); pnlThird.add(new Label("third")); pnlFirst.add(new JButton("button 1")); pnlSed.add(new JButton("button 2")); pnlThird.add(new JButton("button 3")); pnlDisplayArea.add(pnlFirst,"Cardlayout_first"); pnlDisplayArea.add(pnlSed,"Cardlayout_sed"); pnlDisplayArea.add(pnlThird,"Cardlayout_Third"); ((CardLayout)pnlDisplayArea.getLayout()).show(pnlDisplayArea,"CardLayout_first"); mjButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { //throw new UnsupportedOperationException("Not supported yet."); // ProcessAction(e); mCardLayout.next(pnlDisplayArea); // ((CardLayout)pnlDisplayArea.getLayout()).show(pnlDisplayArea, "Cardlayout_sed"); } }); pnlCommandArea.add(mjButton); mJFrame.add(pnlCommandArea,BorderLayout.NORTH); mJFrame.add(pnlDisplayArea,BorderLayout.CENTER); mJFrame.setBounds(300, 300, 300, 300); mJFrame.setVisible(true); mJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } //将组件添加到Box，此时且不需要设置布局，由新建Box时设置水平还是垂直 public void InitBoxLayout(){ mJFrame.setTitle("BoxLayout"); //不需要下面这句话，错误 //mJFrame.setLayout(new BoxLayout(mJFrame,BoxLayout.X_AXIS )); Box mBox =Box.createHorizontalBox(); for(int i=1; i<15; i++){ JButton mJButton = new JButton(String.valueOf(i)); mBox.add(mJButton); } mJFrame.add(mBox); mJFrame.setBounds(300, 300, 300, 300); mJFrame.pack(); mJFrame.setVisible(true); mJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } //将组件直接添加到Panel，需先设置panel 的布局（为BoxPanel , 垂直还是水平） //我坐在窗前，有时候还可以看到鸟飞过，面对不过空无一物的天空，底下是城市的边缘，很矮很矮的地方。 public void boxLayout(){ Panel mPanel = new Panel(); BoxLayout mBoxLayout = new BoxLayout(mPanel, BoxLayout.Y_AXIS); mPanel.setLayout(mBoxLayout); for(int i=1; i<15; i++){ JButton mJButton = new JButton(String.valueOf(i)); mPanel.add(mJButton); } mJFrame.add(mPanel); mJFrame.setBounds(300, 300, 300, 300); mJFrame.pack(); mJFrame.setVisible(true); mJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void BoxTopPanel() { JPanel topPanel = new JPanel(); String[] columnName = { "姓名", "性别", "单位", "参加项目", "备注" }; String[][] rowData = { { "张三", "男", "计算机系", "100 米 ,200 米", "" }, { "李四", "男", "化学系", "100 米，铅球", "" }, { "李四", "男", "化学系", "100 米，铅球", "" }, { "李四", "男", "化学系", "100 米，铅球", "" }, { "李四", "男", "化学系", "100 米，铅球", "" }, }; // 创建表格 JTable table = new JTable(new DefaultTableModel(rowData, columnName)); // 创建包含表格的滚动窗格 JScrollPane scrollPane = new JScrollPane(table); scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); // 定义 topPanel 的布局为 BoxLayout，BoxLayout 为垂直排列 topPanel.setLayout(new BoxLayout(topPanel, BoxLayout.Y_AXIS)); // 先加入一个不可见的 Strut，从而使 topPanel 对顶部留出一定的空间 topPanel.add(Box.createVerticalStrut(10)); // 加入包含表格的滚动窗格 topPanel.add(scrollPane); // 再加入一个不可见的 Strut，从而使 topPanel 和 middlePanel 之间留出一定的空间 topPanel.add(Box.createVerticalStrut(10)); mJFrame.add(topPanel); mJFrame.setBounds(300, 300, 300, 150); //mJFrame.pack(); mJFrame.setVisible(true); mJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public void InitGridBagLayout(){ GridBagLayout mGridBagLayout = new GridBagLayout(); mJFrame.setLayout(mGridBagLayout); GridBagConstraints mGridBagConstraints = new GridBagConstraints(); mGridBagConstraints.fill = GridBagConstraints.BOTH; mGridBagConstraints.gridx = 0; mGridBagConstraints.gridy = 0; mGridBagConstraints.gridheight = 2; mGridBagConstraints.gridwidth = 1; mGridBagConstraints.anchor = GridBagConstraints.NORTH; mGridBagConstraints.weightx = 0; mGridBagConstraints.weighty = 0; JButton btn = new JButton("button 1"); mGridBagLayout.setConstraints(btn, mGridBagConstraints); mJFrame.add(btn); mGridBagConstraints.fill = GridBagConstraints.BOTH; mGridBagConstraints.gridx = 300; mGridBagConstraints.gridy = 300; mGridBagConstraints.gridheight = GridBagConstraints.REMAINDER; mGridBagConstraints.gridwidth = 10; mGridBagConstraints.anchor = GridBagConstraints.SOUTHEAST; mGridBagConstraints.weightx = 0; mGridBagConstraints.weighty = 0; btn = new JButton("button 2"); mGridBagLayout.setConstraints(btn, mGridBagConstraints); mJFrame.add(btn); mJFrame.setBounds(300, 300, 300, 300); // mJFrame.pack(); mJFrame.setVisible(true); mJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } private void ProcessAction(ActionEvent e){ if(((Button)e.getSource()).equals(mjButton)){ mCardLayout.next(pnlDisplayArea); } } /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here LayoutManager mLayoutManager = new LayoutManager(); // mLayoutManager.InitGridLayout(); //mLayoutManager.InitFlowLayout(); //mLayoutManager.InitCardLayout();//BorderLayout // // mLayoutManager.InitBoxLayout(); //mLayoutManager.InitGridBagLayout(); // mLayoutManager.boxLayout(); mLayoutManager.BoxTopPanel(); }}
