src/java.base/share/classes/java/util/HashMap.java

imported patch loadFactor-isNaN

@@ -443,11 +443,11 @@
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal initial capacity: " +
                                                initialCapacity);
         if (initialCapacity > MAXIMUM_CAPACITY)
             initialCapacity = MAXIMUM_CAPACITY;
-        if (loadFactor <= 0 || Float.isNaN(loadFactor))
+        if (!(loadFactor > 0))          // also checks for NaNs
             throw new IllegalArgumentException("Illegal load factor: " +
                                                loadFactor);
         this.loadFactor = loadFactor;
         this.threshold = tableSizeFor(initialCapacity);
     }

@@ -1418,11 +1418,11 @@
     private void readObject(java.io.ObjectInputStream s)
         throws IOException, ClassNotFoundException {
         // Read in the threshold (ignored), loadfactor, and any hidden stuff
         s.defaultReadObject();
         reinitialize();
-        if (loadFactor <= 0 || Float.isNaN(loadFactor))
+        if (!(loadFactor > 0))          // also checks for NaNs
             throw new InvalidObjectException("Illegal load factor: " +
                                              loadFactor);
         s.readInt();                // Read and ignore number of buckets
         int mappings = s.readInt(); // Read number of mappings (size)
         if (mappings < 0)