The swing of Java learning notes basically realizes the function of QQ screen-cutting __swing

Cpframe.java, Capturescreenhh.java and Icon.png.

Cpframe.java

Package captuhhhhh;
Import Java.awt.Rectangle;
Import Java.awt.Robot;
Import Java.awt.Toolkit;
Import java.awt.event.ActionEvent;
Import Java.awt.event.ActionListener;
Import Java.awt.image.BufferedImage;
Import Java.io.BufferedReader;
Import Java.io.BufferedWriter;
Import Java.io.File;
Import Java.io.FileInputStream;
Import java.io.FileNotFoundException;
Import Java.io.FileOutputStream;
Import Java.io.InputStreamReader;

Import Java.io.OutputStreamWriter;
Import Javax.imageio.ImageIO;
Import Javax.swing.JButton;
Import Javax.swing.JFileChooser;
Import Javax.swing.JFrame;
Import Javax.swing.JLabel;
Import Javax.swing.JOptionPane;
Import javax.swing.SwingUtilities;

Import Javax.swing.UIManager;
Import org.dyno.visual.swing.layouts.Constraints;
Import Org.dyno.visual.swing.layouts.GroupLayout;

Import org.dyno.visual.swing.layouts.Leading;
VS4E-does not REMOVE this line!
	public class Cpframe extends JFrame {private static final long serialversionuid = 1L; Private JButton JButton0;
	Private JButton JButton1;
	Private JLabel jLabel0;
	private static final String Preferred_look_and_feel = "Javax.swing.plaf.metal.MetalLookAndFeel";
	Public Cpframe () {initcomponents ();
		private void Initcomponents () {setlayout (New grouplayout ());
		Add (GetJButton1 (), New Constraints (new leading (), 198, new leading (109, 10, 10));
		Add (GetJButton0 (), New Constraints (new leading (), 199, new leading (47, 10, 10));
		Add (GetJLabel0 (), New Constraints (new leading (), new leading (151, 10, 10));
	SetSize (320, 240);
			Private JLabel getJLabel0 () {if (jLabel0 = null) {jLabel0 = new JLabel ();
		Jlabel0.settext ("Double-click the Selection Save");
	return jLabel0;
			Private JButton GetJButton1 () {if (JButton1 = null) {JButton1 = new JButton ();
			Jbutton1.settext ("constituency preservation"); Jbutton1.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent event) {Jbutton1acti
				Onactionperformed (event);
		}
			}); Return JBUtton1;
			Private JButton GetJButton0 () {if (JButton0 = null) {JButton0 = new JButton ();
			Jbutton0.settext ("Full screen save"); Jbutton0.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent event) {Jbutton0acti
				Onactionperformed (event);
		}
			});
	return jButton0;
			private static void Installlnf () {try {String lnfclassname = Preferred_look_and_feel;
			if (Lnfclassname = = null) Lnfclassname = Uimanager.getcrossplatformlookandfeelclassname ();
		Uimanager.setlookandfeel (Lnfclassname); The catch (Exception e) {System.err.println ("Cannot install" + Preferred_look_and_feel + "on this platform:" + E.
		GetMessage ());
	 }/** * Main entry of the class.
	 * Note:this class is a created so, can easily preview the result at runtime.
	 * It is isn't expected to being managed by the designer.
	 * You can modify it as your like.
		*/public static void main (string[] args) {installlnf (); Swingutilities.invoKelater (New Runnable () {@Override public void run () {Cpframe frame = new Cpframe ();
				Frame.setdefaultcloseoperation (Cpframe.exit_on_close);
				Frame.settitle ("Cpframe");
				Frame.getcontentpane (). Setpreferredsize (Frame.getsize ());
				Frame.pack ();
				Frame.setlocationrelativeto (NULL);
			Frame.setvisible (TRUE);
	}
		});
	    }//Full-screen private void Jbutton0actionactionperformed (ActionEvent event) {this.setvisible (false);
			try{FileInputStream Fis2=null;
			InputStreamReader Isr2=null;
			BufferedReader Br2=null;
			FileOutputStream Fos2=null;
			OutputStreamWriter Osw2=null;
			
			BufferedWriter Bw2=null; 
			JFileChooser dlg = new JFileChooser ();
			Dlg.setdialogtype (Jfilechooser.save_dialog);
			
			Dlg.showsavedialog (NULL);
			
			File Getnewfile=dlg.getselectedfile ();
			if (getnewfile==null) {this.setvisible (true);
				}else{String Getnewpath=getnewfile.getpath ();
				String Getnewname=getnewfile.getpath (); String Getnewparent=getnewfile.getParent ();
					Writes a new file try {Robot Robot = the newer Robot ();
			        BufferedImage get = robot.createscreencapture (new Rectangle (Toolkit. Getdefaulttoolkit (). Getscreensize ())); int wideth=get.getwidth (NULL); Get the source map wide int height=get.getheight (NULL);
			        Get the source graph long//write new file Newfile=new files (getnewpath);
			        if (!newfile.exists ()) {newfile.createnewfile ();
					} fos2=new FileOutputStream (newFile);
					
					Osw2=new OutputStreamWriter (FOS2); Imageio.write (GET, "jpg", newFile);//This method either saves directly, or saves} catch (FileNotFoundException e) {e.printstacktrace in the following ways (
				);
					}finally{if (bw2!=null) {bw2.close ();}
					if (osw2!=null) {osw2.close ();}
					if (fos2!=null) {fos2.close ();}
					if (br2!=null) {br2.close ();}
				if (isr2!=null) {isr2.close ();} Joptionpane.showmessagedialog (NULL, "saved successfully.)
		    	");
			This.setvisible (TRUE); } catch (Exception exe) {exe.printstacktrace ();
		 }//Selection private void Jbutton1actionactionperformed (ActionEvent event) {this.setvisible (false);
		 New Capturescreenhh ();
	This.setvisible (TRUE);
 }

}

capturescreenhh.java//This code to someone else's

Package captuhhhhh;
Import java.awt.*;
Import java.awt.event.*;

Import javax.swing.*;

Import java.io.*;

Import javax.imageio.*;
Import Com.sun.image.codec.jpeg.JPEGCodec;

Import Com.sun.image.codec.jpeg.JPEGImageEncoder;
Import java.awt.image.*;  /** * @author Jacky.zhu * * */public class CAPTURESCREENHH extends JFrame implements actionlistener{private JButton
  Start,cancel,save;
  private static bufferedimage get;
  /** creates a new instance of Capturescreen * * Public capturescreenhh () {Dostart ();
      private void Dostart () {try{Robot ro=new Robot ();
      Toolkit Tk=toolkit.getdefaulttoolkit ();
      Dimension di=tk.getscreensize ();
      Rectangle rec=new Rectangle (0,0,di.width,di.height);
      BufferedImage bi=ro.createscreencapture (REC);
      JFrame jf=new JFrame ();
      Jf.getcontentpane (). Add (New Temp (jf,bi,di.width,di.height));
      Jf.setundecorated (TRUE);
      Jf.setsize (DI);
      Jf.setvisible (TRUE);
 Jf.setalwaysontop (TRUE);   }catch (Exception exe) {exe.printstacktrace (); } public static void Dosave (BufferedImage get) throws nullpointerexception{try{FileInputStream fis2=null
		;
		InputStreamReader Isr2=null;
		BufferedReader Br2=null;
		FileOutputStream Fos2=null;
		OutputStreamWriter Osw2=null;
		
		BufferedWriter Bw2=null; 
		JFileChooser dlg = new JFileChooser ();
		Dlg.setdialogtype (Jfilechooser.save_dialog);
		
		Dlg.showsavedialog (NULL);
		
		File Getnewfile=dlg.getselectedfile ();
			if (getnewfile==null) {}else{String getnewpath=getnewfile.getpath ();
			String Getnewname=getnewfile.getpath ();
			
			String getnewparent=getnewfile.getparent ();

		        Write new file try {int wideth=get.getwidth (null);//get source map width int height=get.getheight (null);//Get Source graph length
		        Write a new file Newfile=new files (getnewpath);
		        if (!newfile.exists ()) {newfile.createnewfile ();
				} fos2=new FileOutputStream (newFile); Osw2=new outputsTreamwriter (FOS2);  Imageio.write (GET, "jpg", newFile);//This method is either saved directly or saved////With graphics operation, can change the size of the saved image, Wideth,wideth//BufferedImage
Tag = new BufferedImage (WIDETH,WIDETH,BUFFEREDIMAGE.TYPE_INT_RGB); 
Tag.getgraphics (). DrawImage (Get,0,0,wideth,height,null); Fos2=new FileOutputStream (Getnewpath);
Output to file stream//JPEGImageEncoder encoder = Jpegcodec.createjpegencoder (FOS2); Encoder.encode (tag);
			JPEG codec catch (FileNotFoundException e) {e.printstacktrace ();
				}finally{if (bw2!=null) {bw2.close ();}
				if (osw2!=null) {osw2.close ();}
				if (fos2!=null) {fos2.close ();}
				if (br2!=null) {br2.close ();}
			if (isr2!=null) {isr2.close ();} Joptionpane.showmessagedialog (NULL, "saved successfully.)
	    	
		");
    } catch (Exception exe) {exe.printstacktrace ();
    } public void actionperformed (ActionEvent ae) {if (Ae.getsource () ==start) {Dostart (); else if (Ae.getsource () ==cancel) {//system.exit (0);
    else if (Ae.getsource () ==save) {dosave (get);
  } public static void Main (String args[]) {new capturescreenhh (); }}///////capturescreenhh-end---//////////////////////////////////////////////////////////////////////////////// Displays the current screen image class Temp extends JPanel implements mouselistener,mousemotionlistener{enum states{NOR Th_west (New Cursor (Cursor.nw_resize_cursor)),//indicates Northwest corner north (New Cursor (Cursor.n_resize_cursor)), North_east (New Cur Sor (Cursor.ne_resize_cursor)), East (New Cursor (Cursor.e_resize_cursor)), South_east (New Cursor (CURSOR.SE_RESIZE_CU rsor)), SOUTH (New Cursor (Cursor.s_resize_cursor)), South_west (New Cursor (Cursor.sw_resize_cursor)), West (new C
		  Ursor (Cursor.w_resize_cursor)), Move (new Cursor (Cursor.move_cursor)), DEFAULT (New Cursor (cursor.default_cursor));

		  Private Cursor CS;
		  States (Cursor cs) {This.cs=cs;
		  Public Cursor GetCursor () {return CS;
	
 }
		} Private BufferedImage bi;
  private int width,height;
  private int startx,starty,endx,endy,tempx,tempy;
  Private JFrame JF; Private Rectangle select=new Rectangle (0,0,0,0);//indicates the selected area private Cursor cs;//represents the general situation of the mouse state private States Current=stat Es. default;//represents the current edit state private rectangle[] rec;//represents eight edit points in the area public Temp (JFrame jf,bufferedimage bi,int width,int
    HT) {THIS.JF=JF;
    This.bi=bi;
    This.width=width;
    This.height=height;
    This.addmouselistener (this);
    This.addmousemotionlistener (this);
    Image Icon=toolkit.getdefaulttoolkit (). CreateImage (This.getclass (). GetResource ("Icon.png"));
    Cs=toolkit.getdefaulttoolkit (). Createcustomcursor (Icon,new Point (0,0), "icon");
    This.setcursor (CS);
  Initrecs ();
    private void Initrecs () {rec=new rectangle[8];
    for (int i=0;i<rec.length;i++) {rec[i]=new Rectangle ();
    } public void Paintcomponent (Graphics g) {g.drawimage (bi,0,0,width,height,this);
G.setcolor (color.red);    G.drawline (Startx,starty,endx,starty);
    G.drawline (Startx,endy,endx,endy);
    G.drawline (Startx,starty,startx,endy);
    
    
    G.drawline (Endx,starty,endx,endy);
    int x=startx<endx?startx:endx;
    int y=starty<endy?starty:endy;
    Select=new Rectangle (X,y,math.abs (ENDX-STARTX), Math.Abs (Endy-starty));
    int x1= (STARTX+ENDX)/2;
    int y1= (Starty+endy)/2;
    G.fillrect (x1-2,starty-2,5,5);
    G.fillrect (x1-2,endy-2,5,5);
    G.fillrect (startx-2,y1-2,5,5);
    G.fillrect (endx-2,y1-2,5,5);
    G.fillrect (startx-2,starty-2,5,5);
    G.fillrect (startx-2,endy-2,5,5);
    G.fillrect (endx-2,starty-2,5,5);
    G.fillrect (endx-2,endy-2,5,5);
    Rec[0]=new Rectangle (x-5,y-5,10,10);
    Rec[1]=new Rectangle (x1-5,y-5,10,10);
    Rec[2]=new Rectangle ((startx>endx?startx:endx) -5,y-5,10,10);
    Rec[3]=new Rectangle ((startx>endx?startx:endx) -5,y1-5,10,10);
    Rec[4]=new Rectangle (STARTX&GT;ENDX?STARTX:ENDX) -5, (Starty>endy?starty:endy) -5,10,10); Rec[5]=new rectaNgle (X1-5, (Starty>endy?starty:endy) -5,10,10);
    Rec[6]=new Rectangle (x-5, (Starty>endy?starty:endy) -5,10,10);
  Rec[7]=new Rectangle (x-5,y1-5,10,10); public void mousemoved (MouseEvent me) {if Select.contains (Me.getpoint ()) {This.setcursor (new Cursor (Cursor .
      Move_cursor));
    Current=states.move;
      } else{states[] St=states.values ();
          for (int i=0;i<rec.length;i++) {if (Rec[i].contains (Me.getpoint ())) {Current=st[i];
          This.setcursor (St[i].getcursor ());
        Return
      } this.setcursor (CS);
    Current=states.default; } public void mouseexited (MouseEvent me) {} public void mouseentered (MouseEvent me) {} public void MOUs
    Edragged (mouseevent me) {int x=me.getx ();
    int y=me.gety ();
      if (current==states.move) {startx+= (X-TEMPX);
      starty+= (Y-tempy);
      endx+= (X-TEMPX);
      endy+= (Y-tempy);
      Tempx=x;
    Tempy=y; }else if (current==states.easT) {if (startx>endx) {startx+= (X-TEMPX);
      Tempx=x;
        } else{endx+= (X-TEMPX);
      Tempx=x;
        }}else if (Current==states.north) {if (Starty<endy) {starty+= (y-tempy);
      Tempy=y;
        }else{endy+= (y-tempy);
      Tempy=y;
        }}else if (current==states.west) {if (startx<endx) {startx+= (X-TEMPX);
      Tempx=x;
        } else{endx+= (X-TEMPX);
      Tempx=x;
        }}else if (Current==states.south) {if (Starty>endy) {starty+= (y-tempy);
      Tempy=y;
        }else{endy+= (y-tempy);
      Tempy=y;
        } else if (current==states.north_east) {if (startx>endx) {startx+= (X-TEMPX);
      Tempx=x;
        } else{endx+= (X-TEMPX);
      Tempx=x;
        } if (Starty<endy) {starty+= (y-tempy);
      Tempy=y;
        }else{endy+= (y-tempy);
      Tempy=y;
}}else if (current==states.north_west) {      if (startx<endx) {startx+= (X-TEMPX);
      Tempx=x;
        } else{endx+= (X-TEMPX);
      Tempx=x;
        } if (Starty<endy) {starty+= (y-tempy);
      Tempy=y;
        }else{endy+= (y-tempy);
      Tempy=y;
        }}else if (current==states.south_east) {if (Starty>endy) {starty+= (y-tempy);
      Tempy=y;
        }else{endy+= (y-tempy);
      Tempy=y;
        } if (startx>endx) {startx+= (X-TEMPX);
      Tempx=x;
        } else{endx+= (X-TEMPX);
      Tempx=x;
        }}else if (current==states.south_west) {if (Starty>endy) {starty+= (y-tempy);
      Tempy=y;
        }else{endy+= (y-tempy);
      Tempy=y;
        } if (startx<endx) {startx+= (X-TEMPX);
      Tempx=x;
        } else{endx+= (X-TEMPX);
      Tempx=x;
      }} else{startx=tempx;
      Starty=tempy;
      Endx=me.getx ();
    Endy=me.gety (); } This. repaint ();
    public void mousepressed (MouseEvent me) {tempx=me.getx ();
  Tempy=me.gety ();
    public void mousereleased (MouseEvent me) {System.out.println ("mousereleased");
        if (Me.ispopuptrigger ()) {if (current==states.move) {startx=0;
        starty=0;
        endx=0;
        endy=0;
      Repaint ();
      } else{Jf.dispose ();
    }} public void mouseclicked (MouseEvent me) {bufferedimage get; if (Me.getclickcount () ==2) {//rectangle rec=new Rectangle (startx,starty,math.abs), Endx-startx (math.abs
      ));
      Point P=me.getpoint (); if (Select.contains (p)) {if (Select.x+select.width<this.getwidth () &&select.y+select.height<
          This.getheight ()) {get=bi.getsubimage (select.x,select.y,select.width,select.height);
          Jf.dispose ();
          Save.setenabled (TRUE);
        Capturescreenhh.dosave (get);
      }else{int wid=select.width,het=select.height;    if (Select.x+select.width>=this.getwidth ()) {wid=this.getwidth ()-select.x;
          } if (Select.y+select.height>=this.getheight ()) {het=this.getheight ()-select.y;
          } get=bi.getsubimage (Select.x,select.y,wid,het);
          Jf.dispose ();
          Save.setenabled (TRUE);
        Capturescreenhh.dosave (get);

 }
      }
    }
  }
}