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這篇文章主要講解了“Java捕獲當(dāng)前屏幕圖像的方法是什么”,文中的講解內(nèi)容簡(jiǎn)單清晰,易于學(xué)習(xí)與理解,下面請(qǐng)大家跟著小編的思路慢慢深入,一起來研究和學(xué)習(xí)“Java捕獲當(dāng)前屏幕圖像的方法是什么”吧!
import java.awt.*;
import java.awt.image.*;
import
com.sun.image.codec.jpeg.*;
class ImageCanvas extends Canvas{
private
Image image;
private Dimension prefSize;
public ImageCanvas(Image
image){
this.image = image;
calculatePreferredSize();
}
public
void setImage(Image image){
this.image = image;
calculatePreferredSize();
repaint();
}
private void
calculatePreferredSize(){
prefSize = new
Dimension(image.getWidth(this),image.getHeight(this));
System.out.println(image.getWidth(this));
setSize(prefSize);
}
public Dimension getPreferredSize() {
return prefSize;
}
public
Dimension getMinimumSize() {
return prefSize;
}
public void
update(Graphics g){
paint(g);
}
public void paint(Graphics g){
g.drawImage(image,0,0,null);
}
}
class ImageUtils{
public
static Image getScreenImage(){
Robot robot;
try {
robot = new
Robot();
}catch(Exception e) {
throw new RuntimeException("unable to
construct Robot");
}
Dimension screenDims
=Toolkit.getDefaultToolkit().getScreenSize();
Image screen
=robot.createScreenCapture(new
Rectangle(450,350,screenDims.width,screenDims.height)).getScaledInstance(400,300,Image.SCALE_SMOOTH);
MediaTracker tracker =new MediaTracker(new Label());
tracker.addImage(screen,1);
try {
tracker.waitForID(0);
}catch(InterruptedException e) { /** ... */ }
return screen;
}
}
public class ScreenCapture extends Frame{
private ImageCanvas canvas
=new ImageCanvas(ImageUtils.getScreenImage());
public ScreenCapture(){
add(canvas);
setSize(400,300);
setVisible(true);
Thread
imageThread =new UpdateThread();
imageThread.setDaemon(true);
imageThread.start();
}
class UpdateThread extends Thread{
public
void run(){
while(true){
try {
Thread.currentThread().sleep(1000);
}
catch (Exception ex) {
}
canvas.setImage(ImageUtils.getScreenImage());
validate();
}
}
}
public static void main(String[] args){
new ScreenCapture();
}
}
感謝各位的閱讀,以上就是“Java捕獲當(dāng)前屏幕圖像的方法是什么”的內(nèi)容了,經(jīng)過本文的學(xué)習(xí)后,相信大家對(duì)Java捕獲當(dāng)前屏幕圖像的方法是什么這一問題有了更深刻的體會(huì),具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是億速云,小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章,歡迎關(guān)注!
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