clean code. #814

common/src/main/java/com/taobao/arthas/common/PlatformEnum.java

@@ -18,5 +18,5 @@ public enum PlatformEnum {
      */
     MACOSX,
 
-    UNKNOWN;
+    UNKNOWN
 }

core/src/main/java/com/taobao/arthas/core/shell/system/impl/GlobalJobControllerImpl.java

@@ -50,7 +50,7 @@ public class GlobalJobControllerImpl extends JobControllerImpl {
             jobTimeoutTask.cancel();
         }
         return super.removeJob(id);
-    };
+    }
 
     @Override
     public Job createJob(InternalCommandManager commandManager, List<CliToken> tokens, ShellImpl shell) {

core/src/test/java/com/taobao/arthas/core/testtool/TestUtils.java

@@ -16,7 +16,6 @@
  */
 package com.taobao.arthas.core.testtool;
 
-import com.taobao.arthas.core.shell.cli.CliToken;
 import org.junit.Assert;
 
 import java.io.File;

core/src/test/java/com/taobao/arthas/core/util/FileUtilsTest.java

@@ -8,12 +8,9 @@ import org.junit.rules.ExpectedException;
 import org.junit.rules.TemporaryFolder;
 
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.nio.charset.Charset;
-import java.util.Arrays;
 import java.util.List;
 
 import static org.hamcrest.CoreMatchers.allOf;

testcase/src/main/java/com/alibaba/arthas/Type.java

@@ -1,5 +1,5 @@
 package com.alibaba.arthas;
 
 public enum Type {
-    RUN, STOP;
+    RUN, STOP
 }