Sequential Screen Capture Utility

This is a simple java program that allows you take sequential screen prints with very less efforts.



import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Calendar;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;



public class ScreenCapture {


public static void main(String[] argv) throws Exception{

int i,time;
String option="S";
if(argv.length > 0) {
try {
time = Integer.parseInt(argv[0]);
for(i=0;i< time;i++){
captureandstorescreenshot();}}catch(NumberFormatException nfe) {
if (argv[0].equalsIgnoreCase("-help"))
{System.out.println("ScreenCapture Utility \n\n Usage:Run the program to capture screenshots for the next x seconds using the command [javac ScreenCapture x].\n Ex:javac ScreenCapture 20\n");
}
else if (argv[0].equalsIgnoreCase("-SE"))
{
while(!option.equalsIgnoreCase("X")){
InfiniteLoop t = new InfiniteLoop();
if(option.equalsIgnoreCase("S")){
t.start();}
Console console = System.console();
option= console.readLine("Enter E to end,S to start and X to exit?");
if(option.equalsIgnoreCase("E")){
Thread.sleep(1);
t.interrupt();}
}
}
else{
System.err.println(argv[0]+" is not a valid number of seconds.'javac ScreenCapture -help' for syntax.");
System.exit(-1);}}}
}
public static void CaptureAndStoreScreenShot(){
try{
Calendar rightNow = Calendar.getInstance();
Dimension scrensize = Toolkit.getDefaultToolkit().getScreenSize();
Robot robot = new Robot();
BufferedImage img = robot.createScreenCapture(new Rectangle(scrensize));
//difference (measured in milliseconds) between the current time and midnight, January 1, 1970 UTC
String filename ="screen"+System.currentTimeMillis()+".jpg";
ImageIO.write(img, "JPG", new File(filename));
}catch(Exception e){return;}
}
}

class InfiniteLoop extends Thread
{
public void run(){
for( ; ;){
ScreenCapture.CaptureAndStoreScreenShot();
if (Thread.interrupted()) {
// System.out.println("Interrupted");
return;
}
}
}
}
The below error occurs in older versions(Pre java 2) while interrupting the thread. It seems like a bug in older versions of java.

AWT blocker activation interrupted:
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:429)
at sun.awt.AWTAutoShutdown.activateBlockerThread(AWTAutoShutdown.java:30
9)
at sun.awt.AWTAutoShutdown.setToolkitBusy(AWTAutoShutdown.java:226)
at sun.awt.AWTAutoShutdown.notifyToolkitThreadBusy(AWTAutoShutdown.java:
118)
at sun.awt.windows.WToolkit.(WToolkit.java:217)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct
orAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC
onstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:308)
at java.lang.Class.newInstance(Class.java:261)
at java.awt.Toolkit$2.run(Toolkit.java:760)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:739)
at ScreenCapture.CaptureAndStoreScreenShot(ScreenCapture.java:44)
at InfiniteLoop.run(ScreenCapture.java:58)