diff --git a/src/RomanNumerals.java b/src/RomanNumerals.java
index 20904f0..1c310ec 100644
--- a/src/RomanNumerals.java
+++ b/src/RomanNumerals.java
@@ -1,8 +1,38 @@
-
+import java.util.HashMap; 
 public class RomanNumerals {
-	public int convertToInteger(String romanNum) {
-		// To be Implemented
-		return 0;
-		
+	public int convertToInteger(String romanNum) throws Exception {
+		String[] str = new String[6];
+		str[0] = "VV";	str[0] = "LL";	str[0] = "DD";	str[0] = "IIII";	str[0] = "XXXX";	str[0] = "CCCC";
+		int i=0;
+		for( i=0 ; i<6 ; i++)
+		{
+			if( romanNum.contains(str[i]))
+				throw new ContainSuccessive_1_Number();
+		}
+		HashMap<String,Integer> hashmap = new HashMap<String,Integer>();
+		hashmap.put("I", 1);	hashmap.put("V", 5);	hashmap.put("X", 10);	hashmap.put("L", 50);
+		hashmap.put("C", 100);	hashmap.put("D", 500);	hashmap.put("M", 1000);	hashmap.put("IV", 4);
+		hashmap.put("IX", 9);	hashmap.put("XL", 40);	hashmap.put("XC", 90);	hashmap.put("CD", 400);	hashmap.put("CM", 900);
+		int result = 0;
+		int index = 0;
+		while( index<romanNum.length() )
+		{
+			if( !hashmap.containsKey(romanNum.substring(index,index+1)) )
+				throw new ContainOtherCharacterException();
+			if( index==romanNum.length()-1 )
+			{		result += hashmap.get(romanNum.substring(index,romanNum.length()));		break;	}
+			if( hashmap.containsKey(romanNum.substring(index,index+2)) )
+			{		result += hashmap.get(romanNum.subSequence(index, index+2));	index +=2;		}
+			else
+			{	result += hashmap.get(romanNum.substring(index,index+1));		index++;		}
+		}
+		return result;		
+	}
+	class ContainOtherCharacterException extends Exception{
+		public ContainOtherCharacterException(){}
+	}
+	
+	class ContainSuccessive_1_Number extends Exception{
+		public ContainSuccessive_1_Number(){}
 	}
 }
diff --git a/tests/TestRomanNumerals.java b/tests/TestRomanNumerals.java
index 5d1de75..c267629 100644
--- a/tests/TestRomanNumerals.java
+++ b/tests/TestRomanNumerals.java
@@ -5,8 +5,208 @@
 public class TestRomanNumerals {
 
 	@Test
-	public void test() {
-		fail("Not yet implemented");
+	public void test_I_1() throws Exception {
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("I");
+		assertEquals(1,result);
+	}
+	
+	@Test
+	public void test_II_2() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("II");
+		assertEquals(2,result);
+	}
+	@Test
+	public void test_III_3() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("III");
+		assertEquals(3,result);
+	}
+	@Test
+	public void test_IV_4() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("IV");
+		assertEquals(4,result);
+	}
+	@Test
+	public void test_V_5() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("V");
+		assertEquals(5,result);
+	}
+	@Test
+	public void test_VI_6() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("VI");
+		assertEquals(6,result);
+	}
+	@Test
+	public void test_VII_7() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("VII");
+		assertEquals(7,result);
+	}
+	@Test
+	public void test_VIII_8() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("VIII");
+		assertEquals(8,result);
+	}
+	@Test
+	public void test_IX_9() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("IX");
+		assertEquals(9,result);
+	}
+	@Test
+	public void test_X_10() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("X");
+		assertEquals(10,result);
+	}
+	@Test
+	public void test_XI_11() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("XI");
+		assertEquals(11,result);
+	}
+	@Test
+	public void test_XX_20() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("XX");
+		assertEquals(20,result);
+	}
+	@Test
+	public void test_XXX_30() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("XXX");
+		assertEquals(30,result);
+	}
+	
+	@Test
+	public void test_XL_40() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("XL");
+		assertEquals(40,result);
+	}
+	
+	@Test
+	public void test_L_50() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("L");
+		assertEquals(50,result);
+	}
+	
+	@Test
+	public void test_LX_60() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("LX");
+		assertEquals(60,result);
+	}
+	
+	@Test
+	public void test_LXX_70() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("LXX");
+		assertEquals(70,result);
+	}
+	
+	@Test
+	public void test_LXXX_80() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("LXXX");
+		assertEquals(80,result);
+	}
+	
+	@Test
+	public void test_XC_90() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("XC");
+		assertEquals(90,result);
+	}
+	
+	@Test
+	public void test_C_100() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("C");
+		assertEquals(100,result);
+	}
+	
+	@Test
+	public void test_CC_200() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("CC");
+		assertEquals(200,result);
+	}
+	
+	@Test
+	public void test_CCC_300() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("CCC");
+		assertEquals(300,result);
+	}
+	
+	@Test
+	public void test_CD_400() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("CD");
+		assertEquals(400,result);
+	}
+	
+	@Test
+	public void test_D_500() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("D");
+		assertEquals(500,result);
+	}
+	
+	@Test
+	public void test_DC_600() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("DC");
+		assertEquals(600,result);
+	}
+	
+	@Test
+	public void test_DCC_700() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("DCC");
+		assertEquals(700,result);
+	}
+	
+	@Test
+	public void test_DCCC_800() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("DCCC");
+		assertEquals(800,result);
+	}
+	
+	@Test
+	public void test_CM_900() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("CM");
+		assertEquals(900,result);
+	}
+	
+	@Test
+	public void test_M_1000() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("M");
+		assertEquals(1000,result);
+	}
+	
+	@Test
+	public void test_MCMLXXXIV_1984() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("MCMLXXXIV");
+		assertEquals(1984,result);
+	}
+	
+	@Test
+	public void test_MMXIV_2014() throws Exception{
+		RomanNumerals RNs = new RomanNumerals();
+		int result = RNs.convertToInteger("MMXIV");
+		assertEquals(2014,result);
 	}
-
 }