我想创建一个为Desktop创建实时流的小程序。 它应该是这样您将图片发送到echo-server并将其响应给客户端。 在那里你可以画出图像。并排。所以它就像电影(或类似的东西)。 但我总是得到一个indexoutofboundsexception。错误在哪里或我如何改进我的计划。
ImageIO.write行显示错误
// 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);
}
}
//获取并发送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();}
}
}
//在第二帧函数中为actionListener对象,所以我可以说谁将他的桌面流式传输,哪些只获取图像。 public void readImage(){ 而(真){
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();}
}
}
}
//客户端的线程
public class handler实现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();}
}
}
答案 0 :(得分:0)
我会将您的for
循环更改为:
int count = Server.connectionArray.size()
int index = count - 1;
for(int i = 0;i < count; i++){
Socket TEMP_SOCK = (Socket)Server.connectionArray.get(index);
out = TEMP_SOCK.getOutputStream();
writer = new PrintWriter(out);
ImageIO.write(image, "png", TEMP_SOCK.getOutputStream());
System.out.println("write3");
}