diff --git a/src-java-test/org/graphstream/gama/tests/SimpleNetStreamViewer.java b/src-java-test/org/graphstream/gama/tests/SimpleNetStreamViewer.java
new file mode 100644
index 0000000000000000000000000000000000000000..38c26fcc24b40614e100658b48bbbe8f28faed0f
--- /dev/null
+++ b/src-java-test/org/graphstream/gama/tests/SimpleNetStreamViewer.java
@@ -0,0 +1,22 @@
+package org.graphstream.gama.tests;
+
+import org.graphstream.stream.netstream.NetStreamReceiver;
+import org.graphstream.ui.swingViewer.Viewer;
+
+public class SimpleNetStreamViewer extends Viewer {
+	public SimpleNetStreamViewer(NetStreamReceiver receiver) {
+		this(receiver, true);
+	}
+
+	public SimpleNetStreamViewer(NetStreamReceiver receiver, boolean autoLayout) {
+		super(receiver.getDefaultStream());
+		addDefaultView(true);
+		if (autoLayout)
+			enableAutoLayout();
+	}
+
+	public SimpleNetStreamViewer(NetStreamReceiver receiver, boolean autoLayout, int width, int height) {
+		this(receiver, autoLayout);
+		getDefaultView().resizeFrame(width, height);
+	}
+}
\ No newline at end of file
diff --git a/src-java-test/org/graphstream/gama/tests/Tests.java b/src-java-test/org/graphstream/gama/tests/Tests.java
new file mode 100644
index 0000000000000000000000000000000000000000..8c4d9733eedf1442d7076d19d658c8cfdce7e8b1
--- /dev/null
+++ b/src-java-test/org/graphstream/gama/tests/Tests.java
@@ -0,0 +1,21 @@
+package org.graphstream.gama.tests;
+
+import java.io.IOException;
+import java.net.UnknownHostException;
+
+import org.graphstream.stream.netstream.NetStreamReceiver;
+
+public class Tests {
+
+	public static void main(String[] args) throws UnknownHostException, IOException {
+		// System.setProperty("gs.ui.renderer", "org.graphstream.ui.j2dviewer.J2DGraphRenderer");
+
+		// test graph viewer
+		new SimpleNetStreamViewer(new NetStreamReceiver(2000), true, 500, 500);
+		
+		// test graph viewer
+		new SimpleNetStreamViewer(new NetStreamReceiver(2001), true, 500, 500);
+	
+	}
+
+}
\ No newline at end of file