🍻 Basic CheckSum program without

pom.xml

@@ -29,8 +29,13 @@
     </licenses>
 
     <properties>
-        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>17</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <artifactsDir>target</artifactsDir>
+        <executable-suffix/>
     </properties>
 
 </project>

src/main/java/org/rrajesh1979/demo/CheckSum.java

@@ -0,0 +1,33 @@
+package org.rrajesh1979.demo;
+
+import java.io.File;
+import java.math.BigInteger;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+public class CheckSum {
+    static String algorithm = "MD5";
+
+    public static void main(String[] args) {
+        String fileName = "";
+        if (args.length > 0) {
+            fileName = args[0];
+        }
+        try {
+            byte[] checkSum = getCheckSum(fileName);
+            System.out.printf("%0" + (checkSum.length*2) + "x%n", new BigInteger(1, checkSum));
+        } catch (IOException | NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    public static byte[] getCheckSum(String fileName) throws IOException, NoSuchAlgorithmException {
+        File file = new File(fileName);
+        byte[] fileContents = Files.readAllBytes(file.toPath());
+        byte[] digest = MessageDigest.getInstance(algorithm).digest(fileContents);
+        return digest;
+    }
+}

src/main/resources/testdata/TestFile-1.txt

@@ -0,0 +1 @@
+Hello World!