diff --git a/core/src/processing/data/FloatDict.java b/core/src/processing/data/FloatDict.java
index 3ef440595..518699dd9 100644
--- a/core/src/processing/data/FloatDict.java
+++ b/core/src/processing/data/FloatDict.java
@@ -23,7 +23,7 @@ public class FloatDict {
   protected float[] values;
 
   /** Internal implementation for faster lookups */
-  private HashMap<String, Integer> indices = new HashMap<String, Integer>();
+  private HashMap<String, Integer> indices = new HashMap<>();
 
 
   public FloatDict() {
@@ -146,12 +146,12 @@ public class FloatDict {
    */
   public void clear() {
     count = 0;
-    indices = new HashMap<String, Integer>();
+    indices = new HashMap<>();
   }
 
 
   private void resetIndices() {
-    indices = new HashMap<String, Integer>(count);
+    indices = new HashMap<>(count);
     for (int i = 0; i < count; i++) {
       indices.put(keys[i], i);
     }
diff --git a/core/src/processing/data/IntDict.java b/core/src/processing/data/IntDict.java
index c3e684fab..8a11b44b9 100644
--- a/core/src/processing/data/IntDict.java
+++ b/core/src/processing/data/IntDict.java
@@ -23,7 +23,7 @@ public class IntDict {
   protected int[] values;
 
   /** Internal implementation for faster lookups */
-  private HashMap<String, Integer> indices = new HashMap<String, Integer>();
+  private HashMap<String, Integer> indices = new HashMap<>();
 
 
   public IntDict() {
@@ -147,12 +147,12 @@ public class IntDict {
    */
   public void clear() {
     count = 0;
-    indices = new HashMap<String, Integer>();
+    indices = new HashMap<>();
   }
 
 
   private void resetIndices() {
-    indices = new HashMap<String, Integer>(count);
+    indices = new HashMap<>(count);
     for (int i = 0; i < count; i++) {
       indices.put(keys[i], i);
     }
diff --git a/core/src/processing/data/StringDict.java b/core/src/processing/data/StringDict.java
index 6204ef523..dc695642a 100644
--- a/core/src/processing/data/StringDict.java
+++ b/core/src/processing/data/StringDict.java
@@ -23,7 +23,7 @@ public class StringDict {
   protected String[] values;
 
   /** Internal implementation for faster lookups */
-  private HashMap<String, Integer> indices = new HashMap<String, Integer>();
+  private HashMap<String, Integer> indices = new HashMap<>();
 
 
   public StringDict() {
@@ -168,12 +168,12 @@ public class StringDict {
    */
   public void clear() {
     count = 0;
-    indices = new HashMap<String, Integer>();
+    indices = new HashMap<>();
   }
 
 
   private void resetIndices() {
-    indices = new HashMap<String, Integer>(count);
+    indices = new HashMap<>(count);
     for (int i = 0; i < count; i++) {
       indices.put(keys[i], i);
     }