address some LGTM reported issues and other inspections (#188)

* make package privat and remove redundant returns and var initialization

* use parametrized constructor

addresses #172

* LGTM - This check is useless, myfilereader cannot be null here, since new BufferedReader(...) always is non-null.

* LGTM - This FileOutputStream is not always closed on method exit.

* LGTM - The variable 'tmp' is only assigned values of primitive type and is never 'null', but it is declared with the boxed type 'Integer'.

src/main/java/net/atomique/ksar/LocalCommand.java

@@ -22,16 +22,15 @@ public class LocalCommand extends Thread {
 
   private static final Logger log = LoggerFactory.getLogger(LocalCommand.class);
 
-  public LocalCommand(kSar hissar) {
+  LocalCommand(kSar hissar) {
     mysar = hissar;
     try {
       command = JOptionPane.showInputDialog(GlobalOptions.getUI(), "Enter local command ", "sar -A");
       if (command == null) {
         return;
       }
       String[] cmdArray = command.split(" +");
-      List<String> cmdList = new ArrayList<String>();
-      cmdList.addAll(Arrays.asList(cmdArray));
+      List<String> cmdList = new ArrayList<>(Arrays.asList(cmdArray));
       ProcessBuilder pb = new ProcessBuilder(cmdList);
       pb.environment().put("LC_ALL", "C");
       p = pb.start();
@@ -42,10 +41,9 @@ public LocalCommand(kSar hissar) {
       in = null;
     }
 
-    return;
   }
 
-  public LocalCommand(kSar hissar, String hiscommand) {
+  LocalCommand(kSar hissar, String hiscommand) {
     mysar = hissar;
     command = hiscommand;
     try {
@@ -66,50 +64,42 @@ public LocalCommand(kSar hissar, String hiscommand) {
       in = null;
     }
 
-    return;
   }
 
   private void close() {
     if (p != null) {
       p.destroy();
     }
-
-    try {
-      if (myfilereader != null) {
-        myfilereader.close();
-      }
-    } catch (IOException ex) {
-      log.error("IO Exception", ex);
-    }
   }
 
   public void run() {
-    String current_line;
 
     if (in == null) {
       return;
     }
-    myfilereader = new BufferedReader(new InputStreamReader(in));
-    if (myfilereader == null) {
-      return;
+
+    try {
+      BufferedReader myfilereader = new BufferedReader(new InputStreamReader(in));
+      mysar.parse(myfilereader);
+      myfilereader.close();
+    } catch (IOException ex) {
+      log.error("IO Exception", ex);
     }
 
-    mysar.parse(myfilereader);
 
     close();
   }
 
-  public String get_action() {
+  String get_action() {
     if (command != null) {
       return "cmd://" + command;
     } else {
       return null;
     }
   }
 
-  private kSar mysar = null;
+  private kSar mysar;
   private InputStream in = null;
   private String command = null;
-  private BufferedReader myfilereader = null;
   private Process p = null;
 }

src/main/java/net/atomique/ksar/export/FilePDF.java

@@ -118,6 +118,7 @@ public void run() {
     export_treenode(mysar.graphtree, root);
 
     document.close();
+    writer.close();
 
     if (dialog != null) {
       dialog.dispose();

src/main/java/net/atomique/ksar/xml/CnxHistory.java

@@ -62,8 +62,7 @@ public String getPort() {
   }
 
   public int getPortInt() {
-    Integer tmp = Integer.parseInt(port);
-    return tmp.intValue();
+    return Integer.parseInt(port);
   }
 
   public void setPort(String port) {