Some small makeup

- use diamond notation <> to remove redundant type specification
- do no cache listeners, because it makes the code heavier for a
a very small gain in memory usage.
- removed redundant "this" keywords

Author: cmaglie

app/src/processing/app/AbstractTextMonitor.java

@@ -136,7 +136,7 @@ public void windowGainedFocus(WindowEvent e) {
     minimumSize.setSize(minimumSize.getWidth() / 3, minimumSize.getHeight());
     noLineEndingAlert.setMinimumSize(minimumSize);
 
-    lineEndings = new JComboBox<String>(new String[]{tr("No line ending"), tr("Newline"), tr("Carriage return"), tr("Both NL & CR")});
+    lineEndings = new JComboBox<>(new String[]{tr("No line ending"), tr("Newline"), tr("Carriage return"), tr("Both NL & CR")});
     lineEndings.addActionListener((ActionEvent event) -> {
       PreferencesData.setInteger("serial.line_ending", lineEndings.getSelectedIndex());
       noLineEndingAlert.setForeground(pane.getBackground());
@@ -146,7 +146,7 @@ public void windowGainedFocus(WindowEvent e) {
 
     lineEndings.setMaximumSize(lineEndings.getMinimumSize());
 
-    serialRates = new JComboBox<String>();
+    serialRates = new JComboBox<>();
     for (String rate : serialRateStrings) {
       serialRates.addItem(rate + " " + tr("baud"));
     }

app/src/processing/app/Base.java

@@ -1880,9 +1880,6 @@ public void handleFontSizeChange(int change) {
     getEditors().forEach(Editor::applyPreferences);
   }
 
-  private MouseWheelListener editorFontResizeMouseWheelListener = null;
-  private KeyListener editorFontResizeKeyListener = null;
-
   /**
    * Adds a {@link MouseWheelListener} and {@link KeyListener} to the given
    * component that will make "CTRL scroll" and "CTRL +/-"
@@ -1894,8 +1891,8 @@ public void handleFontSizeChange(int change) {
    * @param comp - The component to add the listener to.
    */
   public void addEditorFontResizeListeners(Component comp) {
-    this.addEditorFontResizeMouseWheelListener(comp);
-    this.addEditorFontResizeKeyListener(comp);
+    addEditorFontResizeMouseWheelListener(comp);
+    addEditorFontResizeKeyListener(comp);
   }
 
   /**
@@ -1907,20 +1904,17 @@ public void addEditorFontResizeListeners(Component comp) {
    * @param comp - The component to add the listener to.
    */
   public void addEditorFontResizeMouseWheelListener(Component comp) {
-    if (this.editorFontResizeMouseWheelListener == null) {
-      this.editorFontResizeMouseWheelListener = (MouseWheelEvent e) -> {
-        if (e.isControlDown()) {
-          if (e.getWheelRotation() < 0) {
-            this.handleFontSizeChange(1);
-          } else {
-            this.handleFontSizeChange(-1);
-          }
+    comp.addMouseWheelListener(e -> {
+      if (e.isControlDown()) {
+        if (e.getWheelRotation() < 0) {
+          this.handleFontSizeChange(1);
         } else {
-          e.getComponent().getParent().dispatchEvent(e);
+          this.handleFontSizeChange(-1);
         }
-      };
-    }
-    comp.addMouseWheelListener(this.editorFontResizeMouseWheelListener);
+      } else {
+        e.getComponent().getParent().dispatchEvent(e);
+      }
+    });
   }
 
   /**
@@ -1930,29 +1924,26 @@ public void addEditorFontResizeMouseWheelListener(Component comp) {
    * @param comp - The component to add the listener to.
    */
   public void addEditorFontResizeKeyListener(Component comp) {
-    if (this.editorFontResizeKeyListener == null) {
-      this.editorFontResizeKeyListener = new KeyAdapter() {
-        @Override
-        public void keyPressed(KeyEvent e) {
-          if (e.getModifiersEx() == KeyEvent.CTRL_DOWN_MASK
-              || e.getModifiersEx() == (KeyEvent.CTRL_DOWN_MASK
-                  | KeyEvent.SHIFT_DOWN_MASK)) {
-            switch (e.getKeyCode()) {
-              case KeyEvent.VK_PLUS:
-              case KeyEvent.VK_EQUALS:
-                Base.this.handleFontSizeChange(1);
-                break;
-              case KeyEvent.VK_MINUS:
-                if (!e.isShiftDown()) {
-                  Base.this.handleFontSizeChange(-1);
-                }
-                break;
+    comp.addKeyListener(new KeyAdapter() {
+      @Override
+      public void keyPressed(KeyEvent e) {
+        if (e.getModifiersEx() == KeyEvent.CTRL_DOWN_MASK
+            || e.getModifiersEx() == (KeyEvent.CTRL_DOWN_MASK
+                                      | KeyEvent.SHIFT_DOWN_MASK)) {
+          switch (e.getKeyCode()) {
+          case KeyEvent.VK_PLUS:
+          case KeyEvent.VK_EQUALS:
+            Base.this.handleFontSizeChange(1);
+            break;
+          case KeyEvent.VK_MINUS:
+            if (!e.isShiftDown()) {
+              Base.this.handleFontSizeChange(-1);
             }
+            break;
           }
         }
-      };
-    }
-    comp.addKeyListener(this.editorFontResizeKeyListener);
+      }
+    });
   }
 
   public List<JMenu> getBoardsCustomMenus() {