JTabbedPane添加关闭按钮和缩略图

  直接实例化就可以使用，一些swing控件的改进的：

  /** [e-mail]* */package exec;import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.awt.geom.AffineTransform;import java.util.ArrayList;import java.util.HashMap;/*** A JTabbedPane which has a close ('X') icon on each tab.* To add a tab, use the method addTab(String, Component)* To have an extra icon on each tab (e.g. like in JBuilder,* showing the file type) use the method* addTab(String, Component, Icon).* Only clicking the 'X' closes the tab. */public class JClosableTabbedPane extends JTabbedPane implements MouseListener { private double scaleRatio = 0.3; private HashMap<String, Component> maps = new HashMap<String, Component>(); public JClosableTabbedPane() { super(); addMouseListener(this); } public void addTab(String title, Component component) { this.addTab(title, component, null); } public void addTab(String title, Component component, Icon extraIcon) { super.addTab(title, new CloseTabIcon(extraIcon), component); } public void insertTab(String title, Icon icon, Component component, String tip, int index) { tip = "tab" + component.hashCode(); maps.put(tip, component); super.insertTab(title, icon, component, tip, index); } public void removeTabAt(int index) { Component component = getComponentAt(index); maps.remove("tab" + component.hashCode()); super.removeTabAt(index); } public JToolTip createToolTip() { ImageToolTip tooltip = new ImageToolTip(); tooltip.setComponent(this); return tooltip; } class ImageToolTip extends JToolTip { public Dimension getPreferredSize() { String tip = getTipText(); Component component = maps.get(tip); if (component != null) { return new Dimension((int) (getScaleRatio() * component.getWidth()), (int) (getScaleRatio() * component.getHeight())); } else { return super.getPreferredSize(); } } public void paintComponent(Graphics g) { String tip = getTipText(); Component component = maps.get(tip); if (component instanceof JComponent) { JComponent jcomponent = (JComponent) component; Graphics2D g2d = (Graphics2D) g; AffineTransform at = g2d.getTransform(); g2d.transform(AffineTransform.getScaleInstance(getScaleRatio(), getScaleRatio())); ArrayList<JComponent> dbcomponents = new ArrayList<JComponent>(); updateDoubleBuffered(jcomponent, dbcomponents); jcomponent.paint(g); resetDoubleBuffered(dbcomponents); g2d.setTransform(at); } } private void updateDoubleBuffered(JComponent component, ArrayList<JComponent> dbcomponents) { if (component.isDoubleBuffered()) { dbcomponents.add(component); component.setDoubleBuffered(false); } for (int i = 0; i < component.getComponentCount(); i++) { Component c = component.getComponent(i); if (c instanceof JComponent) { updateDoubleBuffered((JComponent) c, dbcomponents); } } } private void resetDoubleBuffered(ArrayList<JComponent> dbcomponents) { for (JComponent component : dbcomponents) { component.setDoubleBuffered(true); } } } public double getScaleRatio() { return scaleRatio; } public void setScaleRatio(double scaleRatio) { this.scaleRatio = scaleRatio; } public void mouseClicked(MouseEvent e) { int tabNumber = getUI().tabForCoordinate(this, e.getX(), e.getY()); if (tabNumber < 0) { return; } Rectangle rect = ((CloseTabIcon) getIconAt(tabNumber)).getBounds(); if (rect.contains(e.getX(), e.getY())) { //the tab is being closed this.removeTabAt(tabNumber); } } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } public void mousePressed(MouseEvent e) { } public void mouseReleased(MouseEvent e) { }}/*** The class which generates the 'X' icon for the tabs. The constructor* accepts an icon which is extra to the 'X' icon, so you can have tabs* like in JBuilder. This value is null if no extra icon is required.*/class CloseTabIcon implements Icon { private int x_pos; private int y_pos; private int width; private int height; private Icon fileIcon; public CloseTabIcon(Icon fileIcon) { this.fileIcon = fileIcon; width = 16; height = 16; } public void paintIcon(Component c, Graphics g, int x, int y) { this.x_pos = x; this.y_pos = y; Color col = g.getColor(); g.setColor(Color.black); int y_p = y + 2; g.drawLine(x + 1, y_p, x + 12, y_p); g.drawLine(x + 1, y_p + 13, x + 12, y_p + 13); g.drawLine(x, y_p + 1, x, y_p + 12); g.drawLine(x + 13, y_p + 1, x + 13, y_p + 12); g.drawLine(x + 3, y_p + 3, x + 10, y_p + 10); g.drawLine(x + 3, y_p + 4, x + 9, y_p + 10); g.drawLine(x + 4, y_p + 3, x + 10, y_p + 9); g.drawLine(x + 10, y_p + 3, x + 3, y_p + 10); g.drawLine(x + 10, y_p + 4, x + 4, y_p + 10); g.drawLine(x + 9, y_p + 3, x + 3, y_p + 9); g.setColor(col); if (fileIcon != null) { fileIcon.paintIcon(c, g, x + width, y_p); } } public int getIconWidth() { return width + (fileIcon != null ? fileIcon.getIconWidth() : 0); } public int getIconHeight() { return height; } public Rectangle getBounds() { return new Rectangle(x_pos, y_pos, width, height); } /*public static void main(String args[]) { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { e.printStackTrace(); } JClosableTabbedPane pane = new JClosableTabbedPane(); ImageIcon icon = new ImageIcon("images/middle.jpg"); pane.addTab("tab1",new JButton("first Button"),icon); pane.addTab("tab2",new JButton("sec Button"),icon); pane.addTab("tab3",new JButton("third Button"),icon); pane.addTab("tab4",new JButton("fourth Button"),icon); JFrame frame = new JFrame("Demo"); frame.getContentPane().add(pane,BorderLayout.CENTER); frame.setSize(500,300); frame.setLocation(300,200); frame.show(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }*/}