效果：
一、
二、
代碼：
一、
package?azure.ui.swing.components.tooltip;
import?java.awt.AlphaComposite;
import?java.awt.Color;
import?java.awt.FlowLayout;
import?java.awt.Graphics;
import?java.awt.Graphics2D;
import?java.awt.Point;
import?java.awt.RenderingHints;
import?java.awt.event.MouseEvent;
import?java.awt.event.MouseListener;
import?java.awt.geom.Area;
import?java.awt.geom.Ellipse2D;
import?javax.swing.JButton;
import?javax.swing.JFrame;
import?javax.swing.JLayeredPane;
import?javax.swing.JPanel;
import?javax.swing.SwingUtilities;
/**
?*?@author?Azure
?*?@version?1.0?14/03/07
?*/
public?class?AzEllipseToolTipExample?extends?JFrame?{
????public?AzEllipseToolTipExample()?{
????????init();
????}
????public?void?init()?{
????????HalfOpaqueToolTip?tooltip?=?new?HalfOpaqueToolTip("讓我再吻一吻你的臉！",
????????????????new?Color(250,?250,?200),?Color.RED,?new?Color(95,?145,?145),
????????????????this);
????????JButton?button?=?new?JButton("swing");
????????button.addMouseListener(tooltip);
????????this.setLayout(new?FlowLayout());
????????this.add(new?JButton("金"));
????????this.add(new?JButton("木"));
????????this.add(new?JButton("水"));
????????this.add(new?JButton("火"));
????????this.add(new?JButton("土"));
????????this.add(new?JButton("風"));
????????this.add(new?JButton("雨"));
????????this.add(new?JButton("雷"));
????????this.add(new?JButton("電"));
????????this.add(new?JButton("天"));
????????this.add(new?JButton("地"));
????????this.add(new?JButton("乾"));
????????this.add(new?JButton("坤"));
????????this.add(button);
????????this.add(new?JButton("春"));
????????this.add(new?JButton("夏"));
????????this.setSize(380,?200);
????????this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
????????this.setLocationRelativeTo(null);
????????this.setVisible(true);
????}
????public?static?void?main(String?args[])?{
????????new?AzEllipseToolTipExample();
????}
????class?HalfOpaqueToolTip?extends?JPanel?implements?MouseListener?{
????????private?Color?backGroundCol?=?null;
????????private?Color?foregroundColorCol?=?null;
????????private?Color?borderCol?=?null;
????????private?String?content?=?null;
????????private?JFrame?frame?=?null;
????????private?int?contentEllipseX?=?30;
????????private?int?contentEllipseY?=?20;
????????private?int?contentEllipseW?=?0;
????????private?int?contentEllipseH?=?0;
????????private?int?LEFT?=?1;
????????private?int?RIGHT?=?2;
????????private?int?direction?=?2;
????????public?HalfOpaqueToolTip(String?tooltipContent,?Color?backGroundColor,
????????????????Color?foregroundColor,?Color?borderColor,?JFrame?frame)?{
????????????content?=?tooltipContent;
????????????backGroundCol?=?backGroundColor;
????????????foregroundColorCol?=?foregroundColor;
????????????borderCol?=?borderColor;
????????????/*
?????????????*?調整tooltip的大小
?????????????*/
????????????content?=?tooltipContent;
????????????contentEllipseW?=?tooltipContent.getBytes().length?*?6?+?10;
????????????contentEllipseH?=?40;
????????????this.setSize(contentEllipseX?+?contentEllipseW?+?1,?90);
????????????this.setOpaque(false);
????????????this.setVisible(false);
????????????//?將本控件置于界面的最頂層
????????????frame.getLayeredPane().add(this,?JLayeredPane.POPUP_LAYER);
????????????this.frame?=?frame;
????????}
????????protected?void?paintComponent(Graphics?g)?{
????????????super.paintComponent(g);
????????????Graphics2D?g2d?=?(Graphics2D)?g;
????????????g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
????????????????????RenderingHints.VALUE_ANTIALIAS_ON);
????????????g2d.setColor(backGroundCol);
????????????AlphaComposite?composite?=?AlphaComposite.getInstance(
????????????????????AlphaComposite.SRC_OVER,?70?/?100.0F);
????????????g2d.setComposite(composite);
????????????g2d.fill(getArea());
????????????//?恢復到默認情況
????????????g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
????????????????????RenderingHints.VALUE_ANTIALIAS_OFF);
????????????g2d.setColor(foregroundColorCol);
????????????if?(direction?==?LEFT)?{
????????????????g2d.drawString(content,?(int)?this.getSize().getWidth()
????????????????????????-?contentEllipseX?-?contentEllipseW?+?10,
????????????????????????contentEllipseY?+?contentEllipseH?/?2?+?5);
????????????}?else?{
????????????????g2d.drawString(content,?contentEllipseX?+?10,?contentEllipseY
????????????????????????+?contentEllipseH?/?2?+?5);
????????????}
????????}
????????protected?void?paintBorder(Graphics?g)?{
????????????super.paintBorder(g);
????????????Graphics2D?g2d?=?(Graphics2D)?g;
????????????g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
????????????????????RenderingHints.VALUE_ANTIALIAS_ON);
????????????g2d.setColor(borderCol);
????????????g2d.draw(getArea());
????????}
????????private?Area?getArea()?{
????????????if?(direction?==?LEFT)?{
????????????????return?getLeftArea();
????????????}?else?{
????????????????return?getRightArea();
????????????}
????????}
????????private?Area?getLeftArea()?{
????????????Area?area?=?new?Area(new?Ellipse2D.Float((int)?this.getSize()
????????????????????.getWidth()?-?6?-?1,?(int)?this.getSize().getHeight()?-?20,
????????????????????6,?6));
????????????area.add(new?Area(new?Ellipse2D.Float((int)?this.getSize()
????????????????????.getWidth()?-?10?-?30?+?1,
????????????????????(int)?this.getSize().getHeight()?-?35,?30,?15)));
????????????area.add(new?Area(new?Ellipse2D.Float((int)?this.getSize()
????????????????????.getWidth()
????????????????????-?contentEllipseX?-?contentEllipseW?+?1,?contentEllipseY,
????????????????????contentEllipseW,?contentEllipseH)));
????????????return?area;
????????}
????????private?Area?getRightArea()?{
????????????Area?area?=?new?Area(new?Ellipse2D.Float(0,?(int)?this.getSize()
????????????????????.getHeight()?-?20,?6,?6));
????????????area.add(new?Area(new?Ellipse2D.Float(10,?(int)?this.getSize()
????????????????????.getHeight()?-?35,?30,?15)));
????????????area.add(new?Area(new?Ellipse2D.Float(contentEllipseX,
????????????????????contentEllipseY,?contentEllipseW,?contentEllipseH)));
????????????return?area;
????????}
????????public?void?mouseEntered(MouseEvent?e)?{
????????????Point?p?=?e.getLocationOnScreen();
????????????SwingUtilities.convertPointFromScreen(p,?e.getComponent()
????????????????????.getParent());
????????????if?(p.x?+?this.getWidth()?>?frame.getX())?{
????????????????direction?=?LEFT;
????????????????this.setLocation(new?Point(p.x?-?this.getWidth(),?p.y
????????????????????????-?this.getHeight()));
????????????}?else?{
????????????????direction?=?RIGHT;
????????????????this.setLocation(new?Point(p.x,?p.y?-?this.getHeight()));
????????????}
????????????this.setVisible(true);
????????}
????????public?void?mouseExited(MouseEvent?e)?{
????????????this.setVisible(false);
????????}
????????public?void?mouseClicked(MouseEvent?e)?{
????????}
????????public?void?mousePressed(MouseEvent?e)?{
????????}
????????public?void?mouseReleased(MouseEvent?e)?{
????????}
????}
}
二、
package?azure.ui.swing.components.tooltip;
import?java.awt.AlphaComposite;
import?java.awt.Color;
import?java.awt.FlowLayout;
import?java.awt.Graphics;
import?java.awt.Graphics2D;
import?java.awt.Point;
import?java.awt.Polygon;
import?java.awt.RenderingHints;
import?java.awt.event.MouseEvent;
import?java.awt.event.MouseListener;
import?java.awt.geom.Area;
import?java.awt.geom.RoundRectangle2D;
import?java.util.StringTokenizer;
import?javax.swing.JButton;
import?javax.swing.JFrame;
import?javax.swing.JLayeredPane;
import?javax.swing.JPanel;
import?javax.swing.SwingUtilities;
/**
?*?@author?Azure
?*?@version?1.0?14/03/07
?*/
public?class?AzPolygonToolTipExample?extends?JFrame?{
????public?AzPolygonToolTipExample()?{
????????init();
????}
????public?void?init()?{
????????HalfOpaqueToolTip?tooltip?=?new?HalfOpaqueToolTip(
????????????????"讓我再吻一吻你的臉！",?new?Color(250,?250,?200),
????????????????Color.RED,?new?Color(95,?145,?145),?this);
????????JButton?button?=?new?JButton("swing");
????????button.addMouseListener(tooltip);
????????this.setLayout(new?FlowLayout());
????????this.add(new?JButton("金"));
????????this.add(new?JButton("木"));
????????this.add(new?JButton("水"));
????????this.add(new?JButton("火"));
????????this.add(new?JButton("土"));
????????this.add(new?JButton("風"));
????????this.add(new?JButton("雨"));
????????this.add(new?JButton("雷"));
????????this.add(new?JButton("電"));
????????this.add(new?JButton("天"));
????????this.add(new?JButton("地"));
????????this.add(new?JButton("乾"));
????????this.add(new?JButton("坤"));
????????this.add(button);
????????this.setSize(380,?200);
????????this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
????????this.setLocationRelativeTo(null);
????????this.setVisible(true);
????}
????public?static?void?main(String?args[])?{
????????new?AzPolygonToolTipExample();
????}
????class?HalfOpaqueToolTip?extends?JPanel?implements?MouseListener?{
????????private?Color?backGroundCol?=?null;
????????private?Color?foregroundColorCol?=?null;
????????private?Color?borderCol?=?null;
????????private?String?content?=?null;
????????private?JFrame?frame?=?null;
????????private?int?LEFT?=?1;
????????private?int?RIGHT?=?2;
????????private?int?direction?=?2;
????????public?HalfOpaqueToolTip(String?tooltipContent,?Color?backGroundColor,
????????????????Color?foregroundColor,?Color?borderColor,?JFrame?frame)?{
????????????content?=?tooltipContent;
????????????backGroundCol?=?backGroundColor;
????????????foregroundColorCol?=?foregroundColor;
????????????borderCol?=?borderColor;
????????????/*
?????????????*?調整tooltip的大小
?????????????*/
????????????int?fristRowIndex?=?tooltipContent.indexOf("\n");
????????????String?tooltipStr?=?"";
????????????if?(fristRowIndex?>?0)?{
????????????????tooltipStr?=?tooltipContent.substring(0,?tooltipContent
????????????????????????.indexOf("\n"));
????????????}?else?{
????????????????tooltipStr?=?tooltipContent;
????????????}
????????????this
????????????????????.setSize(tooltipStr.length()?*?this.getFont().getSize()
????????????????????????????+?20,?new?StringTokenizer(tooltipContent,?"\n")
????????????????????????????.countTokens()?*?20?+?20);//?左右各留10的空白空間
????????????this.setOpaque(false);
????????????this.setVisible(false);
????????????//?將本控件置于界面的最頂層
????????????frame.getLayeredPane().add(this,?JLayeredPane.POPUP_LAYER);
????????????this.frame?=?frame;
????????}
????????protected?void?paintComponent(Graphics?g)?{
????????????super.paintComponent(g);
????????????Graphics2D?g2d?=?(Graphics2D)?g;
????????????g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
????????????????????RenderingHints.VALUE_ANTIALIAS_ON);
????????????g2d.setColor(backGroundCol);
????????????AlphaComposite?composite?=?AlphaComposite.getInstance(
????????????????????AlphaComposite.SRC_OVER,?70?/?100.0F);
????????????g2d.setComposite(composite);
????????????g2d.fill(getArea());
????????????g2d.setColor(foregroundColorCol);
????????????g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
????????????????????RenderingHints.VALUE_ANTIALIAS_OFF);
????????????/*
?????????????*?畫上字符內容
?????????????*/
????????????StringTokenizer?contentTokenizer?=?new?StringTokenizer(content,
????????????????????"\n");
????????????int?contentStartY?=?20;
????????????while?(contentTokenizer.hasMoreElements())?{
????????????????g2d.drawString(contentTokenizer.nextToken(),?10,?contentStartY);
????????????????contentStartY?=?contentStartY?+?20;
????????????}
????????}
????????protected?void?paintBorder(Graphics?g)?{
????????????super.paintBorder(g);
????????????Graphics2D?g2d?=?(Graphics2D)?g;
????????????g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
????????????????????RenderingHints.VALUE_ANTIALIAS_ON);
????????????g2d.setColor(borderCol);
????????????g2d.draw(getArea());
????????}
????????private?Area?getArea()?{
????????????if?(direction?==?LEFT)?{
????????????????return?getLeftArea();
????????????}?else?{
????????????????return?getRightArea();
????????????}
????????}
????????private?Area?getLeftArea()?{
????????????Area?area?=?new?Area(new?RoundRectangle2D.Float(0,?0,?this
????????????????????.getWidth()?-?1,?this.getHeight()?-?10,?10,?10));
????????????Polygon?polygon?=?new?Polygon();
????????????polygon.addPoint(this.getWidth()?-?25,?this.getHeight()?-?10);
????????????polygon.addPoint(this.getWidth()?-?10,?this.getHeight()?-?10);
????????????polygon.addPoint(this.getWidth(),?this.getHeight());
????????????area.add(new?Area(polygon));
????????????return?area;
????????}
????????private?Area?getRightArea()?{
????????????Area?area?=?new?Area(new?RoundRectangle2D.Float(0,?0,?this
????????????????????.getWidth()-1,?this.getHeight()?-?10,?10,?10));
????????????Polygon?polygon?=?new?Polygon();
????????????polygon.addPoint(25,?this.getHeight()?-?10);
????????????polygon.addPoint(10,?this.getHeight()?-?10);
????????????polygon.addPoint(0,?this.getHeight());
????????????area.add(new?Area(polygon));
????????????return?area;
????????}
????????public?void?mouseEntered(MouseEvent?e)?{
????????????Point?p?=?e.getComponent().getLocationOnScreen();
????????????SwingUtilities.convertPointFromScreen(p,?e.getComponent()
????????????????????.getParent());
????????????if?(p.x?+?this.getWidth()?>?frame.getX())?{
????????????????direction?=?LEFT;
????????????????this.setLocation(new?Point(p.x?-?this.getWidth()?+?10,?p.y
????????????????????????-?this.getHeight()?+?10));
????????????}?else?{
????????????????direction?=?RIGHT;
????????????????this.setLocation(new?Point(p.x?+?e.getComponent().getWidth(),
????????????????????????p.y?-?this.getHeight()?+?10));
????????????}
????????????this.setVisible(true);
????????}
????????public?void?mouseExited(MouseEvent?e)?{
????????????this.setVisible(false);
????????}
????????public?void?mouseClicked(MouseEvent?e)?{
????????}
????????public?void?mousePressed(MouseEvent?e)?{
????????}
????????public?void?mouseReleased(MouseEvent?e)?{
????????}
????}
}