diff --git a/src/api/java/ConstructorList.java b/src/api/java/ConstructorList.java
index a50ff11ea..fe3fae1ac 100644
--- a/src/api/java/ConstructorList.java
+++ b/src/api/java/ConstructorList.java
@@ -46,7 +46,7 @@ public class ConstructorList extends Z3Object
         super(ctx);
 
         setNativeObject(Native.mkConstructorList(getContext().nCtx(),
-                (int) constructors.length,
+                constructors.length,
                 Constructor.arrayToNative(constructors)));
     }
 }
diff --git a/src/api/java/Context.java b/src/api/java/Context.java
index f1baa92f2..eb51af101 100644
--- a/src/api/java/Context.java
+++ b/src/api/java/Context.java
@@ -373,7 +373,7 @@ public class Context extends IDisposable
            
     {
         checkContextMatch(names);
-        int n = (int) names.length;
+        int n = names.length;
         ConstructorList[] cla = new ConstructorList[n];
         long[] n_constr = new long[n];
         for (int i = 0; i < n; i++)
@@ -2384,7 +2384,7 @@ public class Context extends IDisposable
     {
 
         return Native.benchmarkToSmtlibString(nCtx(), name, logic, status,
-                attributes, (int) assumptions.length,
+                attributes, assumptions.length,
                 AST.arrayToNative(assumptions), formula.getNativeObject());
     }
 
diff --git a/src/api/java/DatatypeSort.java b/src/api/java/DatatypeSort.java
index d7896b15f..644d434d3 100644
--- a/src/api/java/DatatypeSort.java
+++ b/src/api/java/DatatypeSort.java
@@ -101,7 +101,7 @@ public class DatatypeSort extends Sort
            
     {
         super(ctx, Native.mkDatatype(ctx.nCtx(), name.getNativeObject(),
-                (int) constructors.length, arrayToNative(constructors)));
+                constructors.length, arrayToNative(constructors)));
 
     }
 };
diff --git a/src/api/java/EnumSort.java b/src/api/java/EnumSort.java
index da471f5ea..bb60eef56 100644
--- a/src/api/java/EnumSort.java
+++ b/src/api/java/EnumSort.java
@@ -98,7 +98,7 @@ public class EnumSort extends Sort
         long[] n_constdecls = new long[n];
         long[] n_testers = new long[n];
         setNativeObject(Native.mkEnumerationSort(ctx.nCtx(),
-                name.getNativeObject(), (int) n, Symbol.arrayToNative(enumNames),
+                name.getNativeObject(), n, Symbol.arrayToNative(enumNames),
                 n_constdecls, n_testers));        
     }
 };