Convert eight variable assignments to the usage of compound operators

[elfring]

👀 Some source code analysis tools can help to find opportunities for improving software components.
💭 I propose to increase the usage of compound operators accordingly.

diff --git a/src/main/java/nodebox/function/DeviceFunctions.java b/src/main/java/nodebox/function/DeviceFunctions.java
index cfd84cfa..1032add5 100644
--- a/src/main/java/nodebox/function/DeviceFunctions.java
+++ b/src/main/java/nodebox/function/DeviceFunctions.java
@@ -77,7 +77,7 @@ public class DeviceFunctions {
 
         String convertedAddressPrefix = upMatcher.replaceAll("(XXXPLHXXX)");
         if (! convertedAddressPrefix.endsWith("*"))
-            convertedAddressPrefix = convertedAddressPrefix + "*";
+            convertedAddressPrefix += "*";
         convertedAddressPrefix = convertedAddressPrefix.replaceAll("\\*", ".*?");
         convertedAddressPrefix = "^" + convertedAddressPrefix.replaceAll("(XXXPLHXXX)", "[^\\/]*") + "$";
 
diff --git a/src/main/java/nodebox/graphics/Color.java b/src/main/java/nodebox/graphics/Color.java
index 81843954..372c8ae4 100644
--- a/src/main/java/nodebox/graphics/Color.java
+++ b/src/main/java/nodebox/graphics/Color.java
@@ -283,7 +283,7 @@ public final class Color implements Cloneable {
             double s = this.s;
             double v = this.v;
             double f, p, q, t;
-            h = h / (60.0 / 360);
+            h /= 60.0 / 360;
             int i = (int) Math.floor(h);
             f = h - i;
             p = v * (1 - s);
@@ -326,9 +326,9 @@ public final class Color implements Cloneable {
                 h = 4 + (r - g) / d;
         }
 
-        h = h * (60.0 / 360);
+        h *= 60.0 / 360;
         if (h < 0)
-            h = h + 1;
+            h += 1;
 
         return new double[]{h, s, v};
     }
diff --git a/src/main/java/nodebox/ui/ColorDialog.java b/src/main/java/nodebox/ui/ColorDialog.java
index 4e721815..b5dbc5fd 100644
--- a/src/main/java/nodebox/ui/ColorDialog.java
+++ b/src/main/java/nodebox/ui/ColorDialog.java
@@ -88,7 +88,7 @@ public class ColorDialog extends JDialog implements ChangeListener {
                 if (! s.startsWith("#"))
                     s = "#" + s;
                 if (s.length() == 7)
-                    s = s + "ff";
+                    s += "ff";
                 try {
                     nodebox.graphics.Color c = new nodebox.graphics.Color(s);
                     red = (float) c.getRed();
@@ -217,7 +217,7 @@ public class ColorDialog extends JDialog implements ChangeListener {
             float s = saturation;
             float v = brightness;
             float r, g, b, f, p, q, t;
-            h = h / (float) (60.0 / 360);
+            h /= (float) (60.0 / 360);
             int i = (int) Math.floor(h);
             f = h - i;
             p = v * (1 - s);
@@ -271,9 +271,9 @@ public class ColorDialog extends JDialog implements ChangeListener {
                 h = 4 + (red - green) / d;
         }
 
-        h = h * (float) (60.0 / 360);
+        h *= (float) (60.0 / 360);
         if (h < 0)
-            h = h + 1;
+            h += 1;
 
         hue = h;
         saturation = s;