java編程完成屏幕截圖(截屏)代碼總結。本站提示廣大學習愛好者：（java編程完成屏幕截圖(截屏)代碼總結）文章只能為提供參考，不一定能成為您想要的結果。以下是java編程完成屏幕截圖(截屏)代碼總結正文
本文實例總結了罕見的java編程完成屏幕截圖辦法。分享給年夜家供年夜家參考，詳細以下：
辦法一：
import java.awt.Desktop;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
public class CaptureScreen {
public static void captureScreen(String fileName, String folder) throws Exception {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Rectangle screenRectangle = new Rectangle(screenSize);
Robot robot = new Robot();
BufferedImage image = robot.createScreenCapture(screenRectangle);
//保留途徑
File screenFile = new File(fileName);
if (!screenFile.exists()) {
screenFile.mkdir();
}
File f = new File(screenFile, folder);
ImageIO.write(image, "png", f);
//主動翻開
if (Desktop.isDesktopSupported()
&& Desktop.getDesktop().isSupported(Desktop.Action.OPEN))
Desktop.getDesktop().open(f);
}
public static void main(String[] args) {
try {
captureScreen("e:\\你好","11.png");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
辦法二：
package com.qiu.util;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
/**
* 一個簡略的屏幕抓圖
*
**/
public class ScreenCapture {
// test main
public static void main(String[] args) throws Exception {
String userdir = System.getProperty("user.dir");
File tempFile = new File("d:", "temp.png");
ScreenCapture capture = ScreenCapture.getInstance();
capture.captureImage();
JFrame frame = new JFrame();
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
JLabel imagebox = new JLabel();
panel.add(BorderLayout.CENTER, imagebox);
imagebox.setIcon(capture.getPickedIcon());
capture.saveToFile(tempFile);
capture.captureImage();
imagebox.setIcon(capture.getPickedIcon());
frame.setContentPane(panel);
frame.setSize(400, 300);
frame.show();
System.out.println("Over");
}
private ScreenCapture() {
try {
robot = new Robot();
} catch (AWTException e) {
System.err.println("Internal Error: " + e);
e.printStackTrace();
}
JPanel cp = (JPanel) dialog.getContentPane();
cp.setLayout(new BorderLayout());
labFullScreenImage.addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent evn) {
isFirstPoint = true;
pickedImage = fullScreenImage.getSubimage(recX, recY, recW,
recH);
dialog.setVisible(false);
}
});
labFullScreenImage.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent evn) {
if (isFirstPoint) {
x1 = evn.getX();
y1 = evn.getY();
isFirstPoint = false;
} else {
x2 = evn.getX();
y2 = evn.getY();
int maxX = Math.max(x1, x2);
int maxY = Math.max(y1, y2);
int minX = Math.min(x1, x2);
int minY = Math.min(y1, y2);
recX = minX;
recY = minY;
recW = maxX - minX;
recH = maxY - minY;
labFullScreenImage.drawRectangle(recX, recY, recW, recH);
}
}
public void mouseMoved(MouseEvent e) {
labFullScreenImage.drawCross(e.getX(), e.getY());
}
});
cp.add(BorderLayout.CENTER, labFullScreenImage);
dialog.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
dialog.setAlwaysOnTop(true);
dialog.setMaximumSize(Toolkit.getDefaultToolkit().getScreenSize());
dialog.setUndecorated(true);
dialog.setSize(dialog.getMaximumSize());
dialog.setModal(true);
}
// Singleton Pattern
public static ScreenCapture getInstance() {
return defaultCapturer;
}
/** 捕獲全屏慕 */
public Icon captureFullScreen() {
fullScreenImage = robot.createScreenCapture(new Rectangle(Toolkit
.getDefaultToolkit().getScreenSize()));
ImageIcon icon = new ImageIcon(fullScreenImage);
return icon;
}
/** 捕獲屏幕的一個矯形區域 */
public void captureImage() {
fullScreenImage = robot.createScreenCapture(new Rectangle(Toolkit
.getDefaultToolkit().getScreenSize()));
ImageIcon icon = new ImageIcon(fullScreenImage);
labFullScreenImage.setIcon(icon);
dialog.setVisible(true);
}
/** 獲得捕獲後的BufferedImage */
public BufferedImage getPickedImage() {
return pickedImage;
}
/** 獲得捕獲後的Icon */
public ImageIcon getPickedIcon() {
return new ImageIcon(getPickedImage());
}
/**
* 貯存為一個文件,為PNG格局
*
* @deprecated replaced by saveAsPNG(File file)
**/
@Deprecated
public void saveToFile(File file) throws IOException {
ImageIO.write(getPickedImage(), defaultImageFormater, file);
}
/** 貯存為一個文件,為PNG格局 */
public void saveAsPNG(File file) throws IOException {
ImageIO.write(getPickedImage(), "png", file);
}
/** 貯存為一個JPEG格局圖象文件 */
public void saveAsJPEG(File file) throws IOException {
ImageIO.write(getPickedImage(), "JPEG", file);
}
/** 寫入一個OutputStream */
public void write(OutputStream out) throws IOException {
ImageIO.write(getPickedImage(), defaultImageFormater, out);
}
// singleton design pattern
private static ScreenCapture defaultCapturer = new ScreenCapture();
private int x1, y1, x2, y2;
private int recX, recY, recH, recW; // 截取的圖象
private boolean isFirstPoint = true;
private BackgroundImage labFullScreenImage = new BackgroundImage();
private Robot robot;
private BufferedImage fullScreenImage;
private BufferedImage pickedImage;
private String defaultImageFormater = "png";
private JDialog dialog = new JDialog();
}
/** 顯示圖片的Label */
class BackgroundImage extends JLabel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawRect(x, y, w, h);
String area = Integer.toString(w) + " * " + Integer.toString(h);
g.drawString(area, x + (int) w / 2 - 15, y + (int) h / 2);
g.drawLine(lineX, 0, lineX, getHeight());
g.drawLine(0, lineY, getWidth(), lineY);
}
public void drawRectangle(int x, int y, int width, int height) {
this.x = x;
this.y = y;
h = height;
w = width;
repaint();
}
public void drawCross(int x, int y) {
lineX = x;
lineY = y;
repaint();
}
int lineX, lineY;
int x, y, h, w;
}
辦法三：
由於有最小化到體系托盤，照樣須要一張名為bg.gif作為托盤圖標，圖片應放在同級目次下，不然會空指針異常。
重要的截屏代碼部門是：
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);
(源代碼起源於CSDN)
import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import javax.imageio.*;
import java.awt.image.*;
public class CaptureScreen extends JFrame implements ActionListener{
private JButton start,cancel,saveAll;
private JPanel c;
private BufferedImage get;
private JTabbedPane jtp;//一個放置許多份圖片
private int index;//一個一向會遞增的索引,用於標認圖片
private JRadioButton java,system;//JAVA界面,體系界面
/** Creates a new instance of CaptureScreen */
public CaptureScreen() {
super("屏幕截取軟件(第三版)");
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exception exe){
exe.printStackTrace();
}
initWindow();
initOther();
initTrayIcon();
}
private void initOther(){
jtp=new JTabbedPane(JTabbedPane.TOP,JTabbedPane.SCROLL_TAB_LAYOUT);
}
private void initWindow(){
start=new JButton("開端截取");
saveAll=new JButton("保留一切");
cancel=new JButton("加入");
start.addActionListener(this);
saveAll.addActionListener(this);
cancel.addActionListener(this);
JPanel buttonJP=new JPanel();
c=new JPanel(new BorderLayout());
c.setBackground(Color.BLACK);
JLabel jl=new JLabel("屏幕截取",JLabel.CENTER);
jl.setFont(new Font("黑體",Font.BOLD,40));
jl.setForeground(Color.RED);
c.add(jl,BorderLayout.CENTER);
buttonJP.add(start);
buttonJP.add(saveAll);
buttonJP.add(cancel);
buttonJP.setBorder(BorderFactory.createTitledBorder("公共操作區"));
JPanel jp=new JPanel();//放兩個單選按鈕的面板
jp.add(java=new JRadioButton("java界面"));
jp.add(system=new JRadioButton("體系界面",true));
java.addActionListener(this);
system.addActionListener(this);
jp.setBorder(BorderFactory.createTitledBorder("界面作風"));
ButtonGroup bg=new ButtonGroup();
bg.add(java);
bg.add(system);
JPanel all=new JPanel();
all.add(jp);
all.add(buttonJP);
this.getContentPane().add(c,BorderLayout.CENTER);
this.getContentPane().add(all,BorderLayout.SOUTH);
this.setSize(500,400);
this.setLocationRelativeTo(null);
this.setVisible(true);
this.setAlwaysOnTop(true);
this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
this.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent we){
CaptureScreen.this.setVisible(false);
}
});
}
private void initTrayIcon(){
try{
SystemTray st=SystemTray.getSystemTray();
Image im=ImageIO.read(this.getClass().getResource("bg.gif"));
PopupMenu pm=new PopupMenu("彈出菜單");
pm.add(new MenuItem("關於")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
JOptionPane.showMessageDialog(CaptureScreen.this,"<html><Font color=red><center><h2>關於</h2></center></Font>" +
"這是一款純JAVA的屏幕截取法式<br>在之前的基本上增長了一些經常使用的功效,<br>" +
"好比,批量保留,多幅截取,復制到體系粘帖板...<br>" +
"在應用進程中有任何成績,迎接接洽.<br>" +
"<Font size=5 color=blue>作者:千裡冰封<br>" +
"<i>QQ:24325142</i><br></Font></html>");
}
});
pm.addSeparator();
pm.add(new MenuItem("顯示主窗口")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
CaptureScreen.this.setVisible(true);
}
});
pm.add(new MenuItem("開端截取")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
doStart();
}
});
pm.add(new MenuItem("加入法式")).addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
System.exit(0);
}
});
TrayIcon ti=new TrayIcon(im,"JAVA屏幕截取",pm);
st.add(ti);
ti.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
CaptureScreen.this.setVisible(true);
}
});
}catch(Exception exe){
exe.printStackTrace();
}
}
private void updates(){
this.setVisible(true);
if(get!=null){
//假如索引是0,則表現一張圖片都沒有被參加過,
//則要消除以後的器械,從新把tabpane放出去
if(index==0){
c.removeAll();
c.add(jtp,BorderLayout.CENTER);
}else{//不然的話,直接對tabpane添加面板便可以了
//就甚麼都不消做了
}
PicPanel pic=new PicPanel(get);
jtp.addTab("圖片"+(++index),pic);
jtp.setSelectedComponent(pic);
SwingUtilities.updateComponentTreeUI(c);
}
}
private void doStart(){
try{
this.setVisible(false);
Thread.sleep(500);//睡500毫秒是為了讓主窗完整不見
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();
Temp temp=new Temp(jf,bi,di.width,di.height);
jf.getContentPane().add(temp,BorderLayout.CENTER);
jf.setUndecorated(true);
jf.setSize(di);
jf.setVisible(true);
jf.setAlwaysOnTop(true);
} catch(Exception exe){
exe.printStackTrace();
}
}
/**
*公共辦法,處置保留一切的圖片
*/
public void doSaveAll(){
if(jtp.getTabCount()==0){
JOptionPane.showMessageDialog(this,"圖片不克不及為空!!","毛病",JOptionPane.ERROR_MESSAGE);
return;
}
JFileChooser jfc=new JFileChooser(".");
jfc.addChoosableFileFilter(new GIFfilter());
jfc.addChoosableFileFilter(new BMPfilter());
jfc.addChoosableFileFilter(new JPGfilter());
jfc.addChoosableFileFilter(new PNGfilter());
int i=jfc.showSaveDialog(this);
if(i==JFileChooser.APPROVE_OPTION){
File file=jfc.getSelectedFile();
String about="PNG";
String ext=file.toString().toLowerCase();
javax.swing.filechooser.FileFilter ff=jfc.getFileFilter();
if(ff instanceof JPGfilter){
about="JPG";
} else if(ff instanceof PNGfilter){
about="PNG";
}else if(ff instanceof BMPfilter){
about="BMP";
}else if(ff instanceof GIFfilter){
about="GIF";
}
if(ext.endsWith(about.toLowerCase())){
ext=ext.substring(0,ext.lastIndexOf(about.toLowerCase()));
}
//起一個線程去保留這些圖片並顯示出進度條
new SaveAllThread(ext,about).setVisible(true);
}
}
//專門用來保留一切圖片的線程類,它還要顯示出保留的進度條
private class SaveAllThread extends JDialog implements Runnable{
private String name;//文件名頭部分
private String ext;//文件格局
private JProgressBar jpb;//一個進度條
private JLabel info;// 一個信息顯示條
private int allTask,doneTask;//一切義務,已完成義務
public SaveAllThread(String name,String ext){
super(CaptureScreen.this,"保留",true);
this.name=name;
this.ext=ext;
initWindow();
}
private void initWindow(){
jpb=new JProgressBar();
allTask=jtp.getTabCount();
jpb.setMaximum(allTask);
jpb.setMinimum(0);
jpb.setValue(0);
jpb.setStringPainted(true);
setProgressBarString();
info=new JLabel("正在保留到:");
this.getContentPane().setBackground(Color.CYAN);
this.add(info,BorderLayout.NORTH);
this.add(jpb,BorderLayout.SOUTH);
this.setUndecorated(true);
this.setSize(300,100);
this.setLocationRelativeTo(CaptureScreen.this);
new Thread(this).start();
}
private void setProgressBarString(){
jpb.setString(""+doneTask+"/"+allTask);
}
public void run(){
try{
for(int i=0;i<allTask;i++){
PicPanel pp=(PicPanel)jtp.getComponentAt(i);
BufferedImage image=pp.getImage();
File f= new File(name+(doneTask+1)+"."+ext.toLowerCase());
info.setText("<html><b>正在保留到:</b><br>"+f.toString()+"</html>");
ImageIO.write(image,ext,f);
doneTask++;
jpb.setValue(doneTask);
setProgressBarString();
Thread.sleep(500);
}
JOptionPane.showMessageDialog(this,"保留終了!!");
this.dispose();
}catch(Exception exe){
exe.printStackTrace();
this.dispose();
}
}
}
/**
*公用的處置保留圖片的辦法
*這個辦法不再公有了
*/
public void doSave(BufferedImage get){
try{
if(get==null){
JOptionPane.showMessageDialog(this,"圖片不克不及為空!!","毛病",JOptionPane.ERROR_MESSAGE);
return;
}
JFileChooser jfc=new JFileChooser(".");
jfc.addChoosableFileFilter(new GIFfilter());
jfc.addChoosableFileFilter(new BMPfilter());
jfc.addChoosableFileFilter(new JPGfilter());
jfc.addChoosableFileFilter(new PNGfilter());
int i=jfc.showSaveDialog(this);
if(i==JFileChooser.APPROVE_OPTION){
File file=jfc.getSelectedFile();
String about="PNG";
String ext=file.toString().toLowerCase();
javax.swing.filechooser.FileFilter ff=jfc.getFileFilter();
if(ff instanceof JPGfilter){
about="JPG";
if(!ext.endsWith(".jpg")){
String ns=ext+".jpg";
file=new File(ns);
}
} else if(ff instanceof PNGfilter){
about="PNG";
if(!ext.endsWith(".png")){
String ns=ext+".png";
file=new File(ns);
}
}else if(ff instanceof BMPfilter){
about="BMP";
if(!ext.endsWith(".bmp")){
String ns=ext+".bmp";
file=new File(ns);
}
}else if(ff instanceof GIFfilter){
about="GIF";
if(!ext.endsWith(".gif")){
String ns=ext+".gif";
file=new File(ns);
}
}
if(ImageIO.write(get,about,file)){
JOptionPane.showMessageDialog(this,"保留勝利！");
} else
JOptionPane.showMessageDialog(this,"保留掉敗！");
}
} catch(Exception exe){
exe.printStackTrace();
}
}
/**
*公共的處置把以後的圖片參加剪帖板的辦法
*/
public void doCopy(final BufferedImage image){
try{
if(get==null){
JOptionPane.showMessageDialog(this,"圖片不克不及為空!!","毛病",JOptionPane.ERROR_MESSAGE);
return;
}
Transferable trans = new Transferable(){
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { DataFlavor.imageFlavor };
}
public boolean isDataFlavorSupported(DataFlavor flavor) {
return DataFlavor.imageFlavor.equals(flavor);
}
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
if(isDataFlavorSupported(flavor))
return image;
throw new UnsupportedFlavorException(flavor);
}
};
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans, null);
JOptionPane.showMessageDialog(this,"已復制到體系粘帖板!!");
}catch(Exception exe){
exe.printStackTrace();
JOptionPane.showMessageDialog(this,"復制到體系粘帖板失足!!","毛病",JOptionPane.ERROR_MESSAGE);
}
}
//處置封閉事宜
private void doClose(Component c){
jtp.remove(c);
c=null;
System.gc();
}
public void actionPerformed(ActionEvent ae){
Object source=ae.getSource();
if(source==start){
doStart();
} else if(source==cancel){
System.exit(0);
}else if(source==java){
try{
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(this);
}catch(Exception exe){
exe.printStackTrace();
}
}else if(source==system){
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(this);
}catch(Exception exe){
exe.printStackTrace();
}
}else if(source==saveAll){
doSaveAll();
}
}
//一個外部類,它表現一個面板,一個可以被放進tabpane的面板
//也有本身的一套處置保留和復制的辦法
private class PicPanel extends JPanel implements ActionListener{
JButton save,copy,close;//表現保留,復制,封閉的按鈕
BufferedImage get;//獲得的圖片
public PicPanel(BufferedImage get){
super(new BorderLayout());
this.get=get;
initPanel();
}
public BufferedImage getImage(){
return get;
}
private void initPanel(){
save=new JButton("保留(S)");
copy=new JButton("復制到剪帖板(C)");
close=new JButton("封閉(X)");
save.setMnemonic('S');
copy.setMnemonic('C');
close.setMnemonic('X');
JPanel buttonPanel=new JPanel();
buttonPanel.add(copy);
buttonPanel.add(save);
buttonPanel.add(close);
JLabel icon=new JLabel(new ImageIcon(get));
this.add(new JScrollPane(icon),BorderLayout.CENTER);
this.add(buttonPanel,BorderLayout.SOUTH);
save.addActionListener(this);
copy.addActionListener(this);
close.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
Object source=e.getSource();
if(source==save){
doSave(get);
}else if(source==copy){
doCopy(get);
}else if(source==close){
get=null;
doClose(this);
}
}
}
//保留BMP格局的過濾器
private class BMPfilter extends javax.swing.filechooser.FileFilter{
public BMPfilter(){
}
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".bmp")||
file.isDirectory()){
return true;
} else
return false;
}
public String getDescription(){
return "*.BMP(BMP圖象)";
}
}
//保留JPG格局的過濾器
private class JPGfilter extends javax.swing.filechooser.FileFilter{
public JPGfilter(){
}
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".jpg")||
file.isDirectory()){
return true;
} else
return false;
}
public String getDescription(){
return "*.JPG(JPG圖象)";
}
}
//保留GIF格局的過濾器
private class GIFfilter extends javax.swing.filechooser.FileFilter{
public GIFfilter(){
}
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".gif")||
file.isDirectory()){
return true;
} else
return false;
}
public String getDescription(){
return "*.GIF(GIF圖象)";
}
}
//保留PNG格局的過濾器
private class PNGfilter extends javax.swing.filechooser.FileFilter{
public boolean accept(File file){
if(file.toString().toLowerCase().endsWith(".png")||
file.isDirectory()){
return true;
} else
return false;
}
public String getDescription(){
return "*.PNG(PNG圖象)";
}
}
//一個臨時類，用於顯示以後的屏幕圖象
private class Temp extends JPanel implements MouseListener,MouseMotionListener{
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);//表現選中的區域
private Cursor cs=new Cursor(Cursor.CROSSHAIR_CURSOR);//表現普通情形下的鼠標狀況
private States current=States.DEFAULT;// 表現以後的編纂狀況
private Rectangle[] rec;//表現八個編纂點的區域
//上面四個常量,分離表現誰是被選中的那條線上的端點
public static final int START_X=1;
public static final int START_Y=2;
public static final int END_X=3;
public static final int END_Y=4;
private int currentX,currentY;//以後被選中的X和Y,只要這兩個須要轉變
private Point p=new Point();//以後鼠標移的所在
private boolean showTip=true;//能否顯示提醒.假如鼠標左鍵一按,則提醒不再顯了
public Temp(JFrame jf,BufferedImage bi,int width,int height){
this.jf=jf;
this.bi=bi;
this.width=width;
this.height=height;
this.addMouseListener(this);
this.addMouseMotionListener(this);
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>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);
if(showTip){
g.setColor(Color.CYAN);
g.fillRect(p.x,p.y,170,20);
g.setColor(Color.RED);
g.drawRect(p.x,p.y,170,20);
g.setColor(Color.BLACK);
g.drawString("請按住鼠標左鍵不放選擇截圖區",p.x,p.y+15);
}
}
//依據西北東南等八個偏向決議選中的要修正的X和Y的座標
private void initSelect(States state){
switch(state){
case DEFAULT:
currentX=0;
currentY=0;
break;
case EAST:
currentX=(endX>startX?END_X:START_X);
currentY=0;
break;
case WEST:
currentX=(endX>startX?START_X:END_X);
currentY=0;
break;
case NORTH:
currentX=0;
currentY=(startY>endY?END_Y:START_Y);
break;
case SOUTH:
currentX=0;
currentY=(startY>endY?START_Y:END_Y);
break;
case NORTH_EAST:
currentY=(startY>endY?END_Y:START_Y);
currentX=(endX>startX?END_X:START_X);
break;
case NORTH_WEST:
currentY=(startY>endY?END_Y:START_Y);
currentX=(endX>startX?START_X:END_X);
break;
case SOUTH_EAST:
currentY=(startY>endY?START_Y:END_Y);
currentX=(endX>startX?END_X:START_X);
break;
case SOUTH_WEST:
currentY=(startY>endY?START_Y:END_Y);
currentX=(endX>startX?START_X:END_X);
break;
default:
currentX=0;
currentY=0;
break;
}
}
public void mouseMoved(MouseEvent me){
doMouseMoved(me);
initSelect(current);
if(showTip){
p=me.getPoint();
repaint();
}
}
//特地界說一個辦法處置鼠標挪動,是為了每次都能初始化一下所要選擇的地域
private void doMouseMoved(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 mouseDragged(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||current==States.WEST){
if(currentX==START_X){
startX+=(x-tempX);
tempX=x;
}else{
endX+=(x-tempX);
tempX=x;
}
}else if(current==States.NORTH||current==States.SOUTH){
if(currentY==START_Y){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
}else if(current==States.NORTH_EAST||current==States.NORTH_EAST||
current==States.SOUTH_EAST||current==States.SOUTH_WEST){
if(currentY==START_Y){
startY+=(y-tempY);
tempY=y;
}else{
endY+=(y-tempY);
tempY=y;
}
if(currentX==START_X){
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){
showTip=false;
tempX=me.getX();
tempY=me.getY();
}
public void mouseReleased(MouseEvent me){
if(me.isPopupTrigger()){
if(current==States.MOVE){
showTip=true;
p=me.getPoint();
startX=0;
startY=0;
endX=0;
endY=0;
repaint();
} else{
jf.dispose();
updates();
}
}
}
public void mouseClicked(MouseEvent me){
if(me.getClickCount()==2){
//Rectangle rec=new Rectangle(startX,startY,Math.abs(endX-startX),Math.abs(endY-startY));
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();
updates();
}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();
updates();
}
}
}
}
}
public static void main(String args[]){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new CaptureScreen();
}
});
}
}
//一些表現狀況的列舉
enum States{
NORTH_WEST(new Cursor(Cursor.NW_RESIZE_CURSOR)),//表現東南角
NORTH(new Cursor(Cursor.N_RESIZE_CURSOR)),
NORTH_EAST(new Cursor(Cursor.NE_RESIZE_CURSOR)),
EAST(new Cursor(Cursor.E_RESIZE_CURSOR)),
SOUTH_EAST(new Cursor(Cursor.SE_RESIZE_CURSOR)),
SOUTH(new Cursor(Cursor.S_RESIZE_CURSOR)),
SOUTH_WEST(new Cursor(Cursor.SW_RESIZE_CURSOR)),
WEST(new Cursor(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;
}
}
願望本文所述對年夜家Java法式設計有所贊助。
