blue book examples

java/examples/Books/Processing Handbook/Extensions/Network/_02A/_02A.pde

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+import processing.net.*;
+
+Server s;
+Client c;
+String input;
+int data[];
+
+void setup() {
+  size(450, 255);
+  background(204);
+  stroke(0);
+  frameRate(5); // Slow it down a little
+  s = new Server(this, 12345); // Start a simple server on a port
+}
+
+void draw() {
+  if (mousePressed == true) {
+// Draw our line
+    stroke(255);
+    line(pmouseX, pmouseY, mouseX, mouseY);
+// Send mouse coords to other person
+    s.write(pmouseX + " " + pmouseY + " " + mouseX + " " + mouseY + "\n");
+  }
+// Receive data from client
+  c = s.available();
+  if (c != null) {
+    input = c.readString();
+    input = input.substring(0, input.indexOf("\n")); // Only up to the newline
+    data = int(split(input, ' ')); // Split values into an array
+// Draw line using received coords
+    stroke(0);
+    line(data[0], data[1], data[2], data[3]);
+  }
+}