diff --git a/src/zutil/converter/Converter.java b/src/zutil/converter/Converter.java
index 15a76c3..2ddea9c 100755
--- a/src/zutil/converter/Converter.java
+++ b/src/zutil/converter/Converter.java
@@ -59,11 +59,11 @@ public class Converter {
 	 * @return a byte array of four bytes
 	 */
 	public static byte[] toBytes(int num){
-		return new byte[]{ 
-				(byte)(num & 0xff), 
-				(byte)((num >> 8)& 0xff), 
-				(byte)((num >> 16)& 0xff), 
-				(byte)((num >> 24)& 0xff)};
+		return new byte[]{
+				(byte)((num >> 24)& 0xff),
+		        (byte)((num >> 16)& 0xff),
+				(byte)((num >> 8)& 0xff),
+				(byte)(num & 0xff)};
 	}
 	
 	/**
diff --git a/src/zutil/converter/ConverterTest.java b/test/zutil/converter/ConverterTest.java
similarity index 85%
rename from src/zutil/converter/ConverterTest.java
rename to test/zutil/converter/ConverterTest.java
index 7ad52e8..aff0543 100755
--- a/src/zutil/converter/ConverterTest.java
+++ b/test/zutil/converter/ConverterTest.java
@@ -90,4 +90,14 @@ public class ConverterTest {
 		assertEquals(Integer.MAX_VALUE, Converter.toInt(new byte[]{(byte)0x7F,(byte)0xFF,(byte)0xFF,(byte)0xFF}));
 		assertEquals(Integer.MAX_VALUE, Converter.toInt(new byte[]{(byte)0x7F,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF}));
 	}
+
+	@Test
+	public void intToByteArray(){
+		assertArrayEquals(new byte[]{0x00,0x00,0x00,0x00}, Converter.toBytes(0));
+		assertArrayEquals(new byte[]{0x00,0x00,0x00,0x01}, Converter.toBytes(1));
+		assertArrayEquals(new byte[]{0x00,0x00,0x01,0x00}, Converter.toBytes(256));
+		assertArrayEquals(new byte[]{(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF}, Converter.toBytes(-1));
+		assertArrayEquals(new byte[]{(byte)0x7F,(byte)0xFF,(byte)0xFF,(byte)0xFF}, Converter.toBytes(Integer.MAX_VALUE));
+		assertArrayEquals(new byte[]{(byte)0x80,(byte)0x00,(byte)0x00,(byte)0x00}, Converter.toBytes(Integer.MIN_VALUE));
+	}
 }
diff --git a/src/zutil/converter/NumberToWordsConverterTest.java b/test/zutil/converter/NumberToWordsConverterTest.java
similarity index 100%
rename from src/zutil/converter/NumberToWordsConverterTest.java
rename to test/zutil/converter/NumberToWordsConverterTest.java