diff --git a/src/com/sheepit/client/Configuration.java b/src/com/sheepit/client/Configuration.java
index d263d78..898acc4 100644
--- a/src/com/sheepit/client/Configuration.java
+++ b/src/com/sheepit/client/Configuration.java
@@ -36,7 +36,7 @@ import com.sheepit.client.os.OS;
 public class Configuration {
 	public enum ComputeType {
 		CPU_GPU, CPU_ONLY, GPU_ONLY
-	}; // accept job for ...
+	} // accept job for ...
 	
 	public File workingDirectory;
 	public File storageDirectory; // for permanent storage (binary archive)
diff --git a/src/com/sheepit/client/Error.java b/src/com/sheepit/client/Error.java
index 457f5c3..1b4193a 100644
--- a/src/com/sheepit/client/Error.java
+++ b/src/com/sheepit/client/Error.java
@@ -39,7 +39,7 @@ public class Error {
 		OS_NOT_SUPPORTED,
 		CPU_NOT_SUPPORTED,
 		UNKNOWN
-	};
+	}
 	
 	public enum ServerCode {
 		OK(0),
diff --git a/src/com/sheepit/client/Log.java b/src/com/sheepit/client/Log.java
index 7ba970a..8285483 100644
--- a/src/com/sheepit/client/Log.java
+++ b/src/com/sheepit/client/Log.java
@@ -30,7 +30,7 @@ import java.util.Map;
 public class Log {
 	private static Log instance = null;
 	
-	private Map<Integer, ArrayList<String>> checkpoints = new HashMap<Integer, ArrayList<String>>();;
+	private Map<Integer, ArrayList<String>> checkpoints = new HashMap<Integer, ArrayList<String>>();
 	private int lastCheckPoint;
 	private DateFormat dateFormat;
 	
diff --git a/src/com/sheepit/client/Server.java b/src/com/sheepit/client/Server.java
index 5d73154..e895466 100644
--- a/src/com/sheepit/client/Server.java
+++ b/src/com/sheepit/client/Server.java
@@ -387,7 +387,7 @@ public class Server extends Thread implements HostnameVerifier, X509TrustManager
 				
 				String update_method = null;
 				if (renderer_node.hasAttribute("update_method")) {
-					update_method = renderer_node.getAttribute("update_method");;
+					update_method = renderer_node.getAttribute("update_method");
 				}
 				
 				Job a_job = new Job(
diff --git a/src/com/sheepit/client/standalone/GuiSwing.java b/src/com/sheepit/client/standalone/GuiSwing.java
index 249a56c..047fb1d 100644
--- a/src/com/sheepit/client/standalone/GuiSwing.java
+++ b/src/com/sheepit/client/standalone/GuiSwing.java
@@ -37,7 +37,7 @@ import com.sheepit.client.standalone.swing.activity.Working;
 public class GuiSwing extends JFrame implements Gui {
 	public enum ActivityType {
 		WORKING, SETTINGS
-	};
+	}
 	
 	private JPanel panel;
 	private Working activityWorking;