java code with JUNIT test cases

don't worry about the third class

see example below for java on left and junit test cases on the right

Description: We have been tasked with writing a basic HEXIDECIMAL to DECIMAL conversion program. When provided with a HEX number we are to convert it into its DECIMAL equivalent. If any of the provided "HEX" characters are not in fact valid, we need to throw a custom exception, HexFormatException, with the description being: "Ilegal hex character". If all characters are valid, we simply return the decimal result. Required Methods: public static int parseHex(String hexString) throws HexFormatException o Need to implement the HexFormatException class which should extend the Exception Packaging: Fully qualified class names are listed below: . edu.ben.homeworks.homework3.Homework3.java edu.ben.homeworks.homework3.Homework3Test.java . edu.ben.homeworks.homework3.HexFormatException.java Homeworko.java | D HomeworkOTest.java33 " in..in packagehomeworks. homeworke; 1 package e 3 public class Homeworke 5 public static void main(Stringll args) f homeworks. homeworke; 3+ import org. junit.Test: public class HomeworkeTest extends TestCase t System.out.print n("Helto wortd) @Test public void test) f String expected:,'"Hello, world! "; Homeworke.main nulu) String actual systemout.getHistory); assertEquals (expected, actua): 10 12 h 16