Write a screenshot tool in Java

Using Java to imitate QQ

First define a startup class, run this method

1 ImportJava.awt.Rectangle;2 ImportJava.awt.Robot;3 ImportJava.awt.Toolkit;4     5      Public classScreen {6         7          Public Static voidMain (string[] args)throwsException {8             intWidth= (int) Toolkit.getdefaulttoolkit (). Getscreensize (). getwidth ();9             intHeight= (int) Toolkit.getdefaulttoolkit (). Getscreensize (). GetHeight ();TenRobot r=NewRobot (); One             NewView (R.createscreencapture (NewRectangle (0, 0, width, height )); A         } -     } -     

Initializing screenshots

Import Java.awt.toolkit;import java.awt.image.bufferedimage;import Javax.swing.imageicon;import javax.swing.JFrame ; Import Javax.swing.jpanel;public class View extends JFrame {bufferedimage image; BufferedImage Srcimage; JPanel Jp;imageicon icon; View (bufferedimage image) {int width = (int) toolkit.getdefaulttoolkit (). Getscreensize (). getwidth (); int height = (int) Toolkit.getdefaulttoolkit (). Getscreensize (). GetHeight (); this.image = Image;icon = new ImageIcon (image); jp = new Huabu ( image); This.add (JP); this.setsize (width, height); this.setundecorated (true); This.setdefaultcloseoperation ( Jframe.exit_on_close); this.setvisible (True);}}

Mouse Listener Events

1 ImportJava.awt.Color;2 ImportJava.awt.Graphics;3 Importjava.awt.event.ActionEvent;4 ImportJava.awt.event.ActionListener;5 Importjava.awt.event.MouseEvent;6 ImportJava.awt.event.MouseListener;7 ImportJava.awt.event.MouseMotionListener;8 ImportJava.awt.image.BufferedImage;9 ImportJava.io.File;Ten ImportJava.io.FileOutputStream; One Importjava.util.Date; A  - ImportJavax.imageio.ImageIO; - ImportJavax.swing.JButton; the ImportJavax.swing.JOptionPane; - ImportJavax.swing.JPanel; -  -  Public classHuabuextendsJPanelImplementsMouseListener, + Mousemotionlistener, ActionListener { - bufferedimage image; +     intSX = 0; A     intSY = 0; at     inttx = 0; -     intty = 0; -     BooleanFlag =true; -JButton save =NewJButton ("Save"); -  - Huabu (bufferedimage image) { in          This. setlayout (NULL); -          This. Image =image; to          This. Addmouselistener ( This); +          This. Addmousemotionlistener ( This); -Save.addactionlistener ( This); the     } *  $ @OverridePanax Notoginseng      Public voidPaint (Graphics g) { -         //TODO auto-generated Method Stub theG.drawimage (image, 0, 0,NULL); + Draw (g); A  the     } +  -     Private voidDraw (Graphics g) { $ G.setcolor (Color.cyan); $ g.drawline (SX, SY, TX, SY); - g.drawline (SX, Ty, TX, ty); - g.drawline (SX, SY, SX, Ty); the G.drawline (TX, Sy, TX, ty); -System.out.println ("Draw" + tx + "" +ty);Wuyi     } the  - @Override Wu      Public voidmousedragged (MouseEvent e) { -  Abouttx =e.getx (); $Ty =e.gety (); -          This. Repaint (); -SYSTEM.OUT.PRINTLN ("Change target" + tx + "" +ty); -  A     } +  the @Override -      Public voidmousemoved (MouseEvent e) { $         //TODO auto-generated Method Stub the  the     } the  the @Override -      Public voidmouseclicked (MouseEvent e) { in  the     } the  About @Override the      Public voidmousepressed (MouseEvent e) { the         if(flag) { theSYSTEM.OUT.PRINTLN ("Change the original coordinates"); +              This. Addmousemotionlistener ( This); -SX =e.getx (); theSY =e.gety ();Bayi         } the     } the  - @Override -      Public voidmousereleased (MouseEvent e) { theFlag =false; the         intx = TX > SX?tx:sx; the         inty = ty > sy?Ty:sy; theSave.setbounds (x-100, y + 3, 100, 30); -          This. Add (save); theSave.setvisible (true); the Save.requestfocus (); the          This. Repaint ();94  the     } the  the @Override98      Public voidmouseentered (MouseEvent e) { About         //TODO auto-generated Method Stub - 101     }102 103 @Override104      Public voidmouseexited (MouseEvent e) { the         //TODO auto-generated Method Stub106 107     }108 109 @Override the      Public voidactionperformed (ActionEvent e) {111         if(E.getsource () = =Save) { theString name =NewDate (). GetTime () + "";113File f =NewFile ("d:\\" + name + ". jpg"); the FileOutputStream out; the             Try { theout =NewFileOutputStream (f);117System.out.println ("save" + tx + "" +ty);118 119                 if(SX >tx) { - Exchange (SX, TX);121                 }122                 if(Sy >ty) {123 Exchange (sy, Ty);124                 } theImageio.write (Image.getsubimage (SX, SY, TX-SX, Ty-sy),126"JPG", out);127 out.close (); -Joptionpane.showmessagedialog (NULL, "picture" + Name + "successfully saved to D: Disk");129System.exit (1); the}Catch(Exception E1) {131 e1.printstacktrace (); the             }133         }134     }135 136     Private voidExchangeintSy2,intty2) {137         inttemp =Sy2;138Sy2 =ty2;139Ty2 =temp; $     }141 142}

Write a tool in Java