indexoutofboundsexception by sending pictures over Socket

indexoutofboundsexception by sending pictures over Socket

I want to make a little programm that makes a live-stream for Desktop. It
should be so that you send pictures to an echo-server and he response it
to the clients. There you get be draw the Images. Side by Side. And so it
is like a movie(or something like that). But I always get an
indexoutofboundsexception. Where is the error or how can I improve my
program.
The ImageIO.write lines thows the Error
//Client Main
public class Main {
public static void main(String[] args) {
Frame frm = new Frame();
Frame.Client client;
frm.setLayout(null);
frm.setDefaultCloseOperation(Frame.EXIT_ON_CLOSE);
frm.setResizable(false);
frm.setSize(1600,900);
frm.setVisible(true);
}
}
// get and send the Desktopimage
public class desktopCapture {
Robot robo;
BufferedImage screenImage;
Rectangle bounding;
public desktopCapture() {
try {
bounding = new Rectangle(0,0,1600,900);
robo = new Robot();
} catch (AWTException e) {e.printStackTrace();}
}
public void sendScreenCapture(Socket client) {
screenImage = robo.createScreenCapture(bounding);
try {
ImageIO.write(screenImage, "png", client.getOutputStream());
} catch (IOException e) {e.printStackTrace();}
}
}
// in Frame two function for actionListener Objects, so I can say who
streams his Desktop and which get only the Images to. public void
readImage() { while(true) {
try {
while((screenImage = ImageIO.read(in)) != null){
repaintScreen();
}
} catch (IOException e) {e.printStackTrace();}
}
}
public void sendImage() {
try {
while(true){
dC.sendScreenCapture(client);
System.out.println("read1");
while((screenImage = ImageIO.read(in)) != null){
System.out.println("read2");
ImageIO.write(screenImage, "png", new File("image1.png"));
Thread.sleep(250);
}
repaintScreen();
screenImage = null;
}
} catch (IOException | InterruptedException e)
{e.printStackTrace();}
}
}
}
//Thread for a Client
public class handler implements Runnable {
Socket client;
OutputStream out;
InputStream in;
PrintWriter writer;
BufferedImage image;
public handler(Socket client) {
this.client = client;
}
@Override
public void run() {
try {
in = client.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
while(true) {
System.out.println("write1");
while((image = ImageIO.read(in)) != null){
System.out.println("write2");
for(int i = 1;i <= Server.connectionArray.size();i++){
Socket TEMP_SOCK = (Socket)Server.connectionArray.get(i-1);
out = TEMP_SOCK.getOutputStream();
writer = new PrintWriter(out);
ImageIO.write(image, "png", TEMP_SOCK.getOutputStream());
System.out.println("write3");
}
image = null;
}
}
} catch (IOException e) {e.printStackTrace();}
}
}