import java.awt.*;

public class Test{
public static void main (String [] args) throws Exception{

Rectangle rect = new Rectangle( Toolkit.getDefaultToolkit().getScreenSize() );
        Robot robot = new Robot();
        int count = 1;
        long beforeTime = System.currentTimeMillis();
        while ( count < 32 ) {
                robot.createScreenCapture( rect );
                count++;
        }
        double time = System.currentTimeMillis() - beforeTime;
        System.out.println( "Seconds it took for 32 screen captures: " + time / 1000 );

}
}