Code cleaned (unused imports, formatting, IDE warnings, etc)

src/net/apocalypselabs/symat/CodeEditor.java

@@ -32,14 +32,8 @@ import java.awt.Component;
 import java.awt.Font;
 import java.io.BufferedReader;
 import java.io.File;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
-import java.io.PrintStream;
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Paths;
 import javax.swing.JFileChooser;
 import javax.swing.JOptionPane;
 import javax.swing.SwingUtilities;
@@ -63,8 +57,7 @@ public class CodeEditor extends javax.swing.JInternalFrame {
     private final JFileChooser fc = new JFileChooser();
     private boolean isSaved = false;
     private RSyntaxTextArea codeBox = new RSyntaxTextArea();
-    private RTextScrollPane sp;
-    private String lastSaved = "";
+    private final RTextScrollPane sp;
     private boolean fileChanged = false;
 
     private CompletionProvider jscomp = new CodeCompleter("js").getProvider();
@@ -462,7 +455,6 @@ public class CodeEditor extends javax.swing.JInternalFrame {
                 codeBox.setText(FileUtils.readFile(f.toString()));
                 isSaved = true;
                 filedata = f;
-                lastSaved = FileUtils.MD5(codeBox.getText());
                 setTitle("Editor - " + f.getName());
             } catch (IOException ex) {
                 JOptionPane.showInternalMessageDialog(this,

src/net/apocalypselabs/symat/Debug.java

@@ -49,6 +49,7 @@ public class Debug {
         }
     }
 
+    @SuppressWarnings(value = {"CallToPrintStackTrace"}) 
     public static void stacktrace(Exception e) {
         if (DEBUG) {
             e.printStackTrace();

src/net/apocalypselabs/symat/FirstRun.java

@@ -211,7 +211,7 @@ public class FirstRun extends javax.swing.JInternalFrame {
 
     private void contBtnActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_contBtnActionPerformed
         if (noLicSel.isSelected()) {
-            if (PrefStorage.getSetting("licensetype").equals("demo") 
+            if (PrefStorage.getSetting("licensetype").equals("demo")
                     && PrefStorage.getSetting("licensedemo").equals("used")) {
                 int ans = JOptionPane.showInternalConfirmDialog(this,
                         "You have already used a trial license."
@@ -219,7 +219,7 @@ public class FirstRun extends javax.swing.JInternalFrame {
                         "Expired",
                         JOptionPane.YES_NO_OPTION);
                 if (ans == JOptionPane.NO_OPTION) {
-                    
+
                 } else {
                     openShop();
                 }
@@ -292,7 +292,7 @@ public class FirstRun extends javax.swing.JInternalFrame {
      */
     private class CheckThread extends Thread {
 
-        private String email;
+        private final String email;
 
         public CheckThread(String useremail) {
             email = useremail;
@@ -303,12 +303,12 @@ public class FirstRun extends javax.swing.JInternalFrame {
             try {
                 Debug.println("Checking license...");
                 URL url = new URL(API_URL + "liccheck.php?email=" + email);
-                InputStream is = url.openStream();
-                BufferedReader br = new BufferedReader(new InputStreamReader(is));
-
-                String line = br.readLine();
-                br.close();
-                is.close();
+                String line;
+                try (InputStream is = url.openStream();
+                        BufferedReader br
+                        = new BufferedReader(new InputStreamReader(is))) {
+                    line = br.readLine();
+                }
 
                 switch (line) {
                     case "ok:single":
@@ -356,12 +356,13 @@ public class FirstRun extends javax.swing.JInternalFrame {
                         JOptionPane.QUESTION_MESSAGE);
                 Debug.println("Checking license code (" + code + ")...");
                 URL url = new URL(API_URL + "emailverify.php?code=" + code + "&email=" + email);
-                InputStream is = url.openStream();
-                BufferedReader br = new BufferedReader(new InputStreamReader(is));
-
-                String line = br.readLine();
-                br.close();
-                is.close();
+                String line;
+                try (InputStream is = url.openStream()) {
+                    BufferedReader br
+                            = new BufferedReader(new InputStreamReader(is));
+                    line = br.readLine();
+                    br.close();
+                }
                 if (code.equals(line)) {
                     success("domain");
                 } else {

src/net/apocalypselabs/symat/FontOptions.java

@@ -1,7 +1,7 @@
 /*
  * Apocalypse Laboratories
  * Open Source License
- * 
+ *
  * Source code can be used for any purpose, as long as:
  *  - Compiled binaries are rebranded and trademarks are not
  *    visible by the end user at any time, except to give
@@ -14,7 +14,7 @@
  *  - and you provide your modified source code for download,
  *    under the terms of the GNU LGPL v3 or a comparable
  *    license.
- * 
+ *
  * Compiled binaries cannot be redistributed or mirrored,
  * unless:
  *  - You have written permission from Apocalypse Laboratories;
@@ -22,7 +22,7 @@
  *    not even behind a paywall or other blocking mechanism;
  *  - or you have received a multi-computer license, in which
  *    case you should take measures to prevent unauthorized
- *    downloads, such as preventing download access from the 
+ *    downloads, such as preventing download access from the
  *    Internet.
  */
 package net.apocalypselabs.symat;
@@ -40,7 +40,7 @@ public class FontOptions extends javax.swing.JPanel {
     public FontOptions() {
         initComponents();
     }
-    
+
     public FontOptions(int size) {
         this();
         jSpinner1.setValue(size);
@@ -104,7 +104,7 @@ public class FontOptions extends javax.swing.JPanel {
     public int getResult() {
         return (int) jSpinner1.getValue();
     }
-    
+
     public boolean isModified() {
         return modified;
     }

src/net/apocalypselabs/symat/Functions.java

@@ -1,7 +1,7 @@
-/* 
+/*
  * Apocalypse Laboratories
  * Open Source License
- * 
+ *
  * Source code can be used for any purpose, as long as:
  *  - Compiled binaries are rebranded and trademarks are not
  *    visible by the end user at any time, except to give
@@ -14,7 +14,7 @@
  *  - and you provide your modified source code for download,
  *    under the terms of the GNU LGPL v3 or a comparable
  *    license.
- * 
+ *
  * Compiled binaries cannot be redistributed or mirrored,
  * unless:
  *  - You have written permission from Apocalypse Laboratories;
@@ -22,7 +22,7 @@
  *    not even behind a paywall or other blocking mechanism;
  *  - or you have received a multi-computer license, in which
  *    case you should take measures to prevent unauthorized
- *    downloads, such as preventing download access from the 
+ *    downloads, such as preventing download access from the
  *    Internet.
  */
 package net.apocalypselabs.symat;
@@ -118,7 +118,7 @@ public class Functions {
         }
     }
 
-    /* 
+    /*
      Graphing interfaces
      */
     public void plotrange(double xmin, double xmax) {

src/net/apocalypselabs/symat/Help.java

@@ -1,7 +1,7 @@
-/* 
+/*
  * Apocalypse Laboratories
  * Open Source License
- * 
+ *
  * Source code can be used for any purpose, as long as:
  *  - Compiled binaries are rebranded and trademarks are not
  *    visible by the end user at any time, except to give
@@ -14,7 +14,7 @@
  *  - and you provide your modified source code for download,
  *    under the terms of the GNU LGPL v3 or a comparable
  *    license.
- * 
+ *
  * Compiled binaries cannot be redistributed or mirrored,
  * unless:
  *  - You have written permission from Apocalypse Laboratories;
@@ -22,7 +22,7 @@
  *    not even behind a paywall or other blocking mechanism;
  *  - or you have received a multi-computer license, in which
  *    case you should take measures to prevent unauthorized
- *    downloads, such as preventing download access from the 
+ *    downloads, such as preventing download access from the
  *    Internet.
  */
 package net.apocalypselabs.symat;
@@ -248,7 +248,7 @@ public class Help extends javax.swing.JInternalFrame {
                     }
                     setText(text, "Manual (" + topicList.getSelectedValue().toString() + ")");
                 } catch (Exception e) {
-                    //JOptionPane.showInternalMessageDialog(MainGUI.mainPane, 
+                    //JOptionPane.showInternalMessageDialog(MainGUI.mainPane,
                     //"Error: Cannot load help topic "+name+".\n\n"+e.getMessage());
                     setText("<html><head></head><body><p><b>Error:</b><br>Cannot get help topic \""
                             + name + "\".<br>(" + e.getMessage() + ")</p></body></html>", "Manual");

src/net/apocalypselabs/symat/Interpreter.java

@@ -31,8 +31,6 @@ import java.awt.Color;
 import java.awt.Font;
 import java.awt.event.KeyEvent;
 import java.io.IOException;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 import javax.swing.JFileChooser;
 import javax.swing.JOptionPane;
 import javax.swing.SwingUtilities;
@@ -412,7 +410,7 @@ public class Interpreter extends javax.swing.JInternalFrame {
                         false);
             } catch (IOException ex) {
                 JOptionPane.showInternalMessageDialog(this,
-                        "Error saving: "+ex.getMessage(),
+                        "Error saving: " + ex.getMessage(),
                         "Error",
                         JOptionPane.ERROR_MESSAGE);
             }
@@ -452,7 +450,7 @@ public class Interpreter extends javax.swing.JInternalFrame {
             }
 
             // Implement ans command
-            String ansfill = "";
+            String ansfill;
             try {
                 ansfill = String.valueOf(Double.parseDouble(ans.toString()));
             } catch (NumberFormatException ex) {
@@ -463,6 +461,7 @@ public class Interpreter extends javax.swing.JInternalFrame {
         }
 
         @Override
+        @SuppressWarnings("null")
         public void run() {
             try {
                 if (doSpecialCommands()) {

src/net/apocalypselabs/symat/MainGUI.java

@@ -29,12 +29,15 @@ package net.apocalypselabs.symat;
 
 import java.awt.Color;
 import java.awt.Font;
+import java.awt.FontFormatException;
 import java.awt.Graphics;
 import java.awt.event.KeyEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.beans.PropertyVetoException;
 import java.io.File;
+import java.io.IOException;
+import java.net.URISyntaxException;
 import java.util.Calendar;
 import java.util.Date;
 import javax.swing.ImageIcon;
@@ -758,7 +761,7 @@ public class MainGUI extends javax.swing.JFrame {
             ubuntuRegular = Font.createFont(Font.TRUETYPE_FONT,
                     new File(MainGUI.class.
                             getResource("resources/Ubuntu-R.ttf").toURI()));
-        } catch (Exception ex) {
+        } catch (URISyntaxException | FontFormatException | IOException ex) {
             ubuntuRegular = Font.getFont(Font.SANS_SERIF);
         }
 

src/net/apocalypselabs/symat/PrefStorage.java

@@ -1,7 +1,7 @@
-/* 
+/*
  * Apocalypse Laboratories
  * Open Source License
- * 
+ *
  * Source code can be used for any purpose, as long as:
  *  - Compiled binaries are rebranded and trademarks are not
  *    visible by the end user at any time, except to give
@@ -14,7 +14,7 @@
  *  - and you provide your modified source code for download,
  *    under the terms of the GNU LGPL v3 or a comparable
  *    license.
- * 
+ *
  * Compiled binaries cannot be redistributed or mirrored,
  * unless:
  *  - You have written permission from Apocalypse Laboratories;
@@ -22,7 +22,7 @@
  *    not even behind a paywall or other blocking mechanism;
  *  - or you have received a multi-computer license, in which
  *    case you should take measures to prevent unauthorized
- *    downloads, such as preventing download access from the 
+ *    downloads, such as preventing download access from the
  *    Internet.
  */
 package net.apocalypselabs.symat;
@@ -45,7 +45,7 @@ public class PrefStorage {
     public static boolean isset(String key) {
         return !getSetting(key, "NULL").equals("NULL");
     }
-    
+
     public static void unset(String key) {
         prefs.remove(key);
     }
@@ -57,7 +57,7 @@ public class PrefStorage {
     public static String getSetting(String key, String emptyResponse) {
         return prefs.get(key, emptyResponse);
     }
-    
+
     public static boolean save() {
         try {
             prefs.flush();