diff --git a/java/build.xml b/java/build.xml
index 35ee2fef..baecd01d 100644
--- a/java/build.xml
+++ b/java/build.xml
@@ -14,6 +14,7 @@
   <property name="java.src.dir" value="${src.dir}/"/>
   <property name="build.dir" value="${basedir}/build"/>
   <property name="lib.dir" value="${basedir}/lib"/>
+  <property name="dist.dir" value="${basedir}/dist"/>
 
   <property name="test.count" value="100"/>
   <property name="test.junit.output.format" value="plain"/>
@@ -64,6 +65,9 @@
     <fileset dir="${ivy.test.lib}">
       <include name="**/*.jar" />
     </fileset>
+    <fileset dir="${dist.dir}">
+      <include name="**/*.jar" />
+    </fileset>
   </path>
   <path id="test.java.classpath">
     <pathelement location="${test.java.classes}" />
@@ -146,7 +150,7 @@
     </javac>
   </target>
   <target name="jar" depends="compile">
-    <jar jarfile="dist/msgpack-0.0.1.jar" basedir="build" />
+    <jar jarfile="${dist.dir}/msgpack-0.0.1.jar" basedir="build" />
   </target>
 
   <!-- test -->
@@ -178,7 +182,7 @@
       <fail if="tests.failed">Tests Failed!</fail>
     </sequential>
   </macrodef>
-  <target name="compile-test" depends="ivy-retrieve-test,compile">
+  <target name="compile-test" depends="ivy-retrieve-test,jar">
     <java-compiler dest="${test.java.classes}"
 		   classpath="test.java.classpath">
       <src path="${test.java.src.dir}/org" />
diff --git a/java/test/org/msgpack/TestPackUnpack.java b/java/test/org/msgpack/TestPackUnpack.java
new file mode 100644
index 00000000..f8eeae7a
--- /dev/null
+++ b/java/test/org/msgpack/TestPackUnpack.java
@@ -0,0 +1,52 @@
+package org.msgpack;
+
+import org.msgpack.*;
+import java.io.*;
+import java.util.*;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class TestPackUnpack {
+    public Object unpackOne(ByteArrayOutputStream out) {
+        ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
+        Unpacker upk = new Unpacker(in);
+        Iterator<Object> it = upk.iterator();
+        assertEquals(true, it.hasNext());
+        Object obj = it.next();
+        assertEquals(false, it.hasNext());
+        return obj;
+    }
+
+    @Test
+    public void testInt() throws Exception {
+        testInt(0);
+        testInt(-1);
+        testInt(1);
+        testInt(Integer.MIN_VALUE);
+        testInt(Integer.MAX_VALUE);
+        Random rand = new Random();
+        for (int i = 0; i < 1000; i++)
+            testInt(rand.nextInt());
+    }
+    public void testInt(int val) throws Exception {
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        Packer pk = new Packer(out);
+        pk.pack(val);
+        Object obj = unpackOne(out);
+        int val2 = -1;
+        if (obj instanceof Byte)
+            val2 = ((Byte)obj).intValue();
+        else if (obj instanceof Integer)
+            val2 = ((Integer)obj).intValue();
+        else if (obj instanceof Short)
+            val2 = ((Short)obj).intValue();
+        else if (obj instanceof Long)
+            val2 = ((Long)obj).intValue();
+        else {
+            System.out.println("obj = " + obj.getClass());
+            assertTrue(false);
+        }
+        assertEquals(val, val2);
+    }
+};