diff --git a/Lib/java/director.swg b/Lib/java/director.swg
index 0850564f3..355e62d67 100644
--- a/Lib/java/director.swg
+++ b/Lib/java/director.swg
@@ -369,7 +369,7 @@ namespace Swig {
     static char *copystr(const char *srcmsg) {
       char *target = 0;
       if (srcmsg) {
-	int msglen = strlen(srcmsg) + 1;
+	size_t msglen = strlen(srcmsg) + 1;
 	target = new char[msglen];
 	strncpy(target, srcmsg, msglen);
       }
diff --git a/Lib/java/java.swg b/Lib/java/java.swg
index 37b3fa940..22a4884ef 100644
--- a/Lib/java/java.swg
+++ b/Lib/java/java.swg
@@ -1341,12 +1341,12 @@ SWIG_PROXY_CONSTRUCTOR(true, true, SWIGTYPE)
   if ($input) JCALL3(ReleaseByteArrayElements, jenv, $input, (jbyte *)$1, 0);
 }
 %typemap(directorin, descriptor="[B") (char *STRING, size_t LENGTH) {
-  jbyteArray jb = (jenv)->NewByteArray($2);
-  (jenv)->SetByteArrayRegion(jb, 0, $2, (jbyte *)$1);
+  jbyteArray jb = (jenv)->NewByteArray((jsize)$2);
+  (jenv)->SetByteArrayRegion(jb, 0, (jsize)$2, (jbyte *)$1);
   $input = jb;
 }
 %typemap(directorargout) (char *STRING, size_t LENGTH)
-%{(jenv)->GetByteArrayRegion($input, 0, $2, (jbyte *)$1);
+%{(jenv)->GetByteArrayRegion($input, 0, (jsize)$2, (jbyte *)$1);
 (jenv)->DeleteLocalRef($input);%}
 %typemap(javadirectorin, descriptor="[B") (char *STRING, size_t LENGTH) "$jniinput"
 %apply (char *STRING, size_t LENGTH) { (char *STRING, int LENGTH) }
diff --git a/Lib/java/various.i b/Lib/java/various.i
index bfcf346d3..e8042b763 100644
--- a/Lib/java/various.i
+++ b/Lib/java/various.i
@@ -65,7 +65,7 @@
 %typemap(out) char **STRING_ARRAY {
   if ($1) {
     int i;
-    int len=0;
+    jsize len=0;
     jstring temp_string;
     const jclass clazz = JCALL1(FindClass, jenv, "java/lang/String");