Implement the Date in IST

Dockerfile

@@ -1,19 +1,23 @@
-# stable official Java runtime base image
-FROM openjdk:17-jdk-alpine
 
-# metadata
-LABEL maintainer="your-email@example.com"
-LABEL version="1.0"
-LABEL description="A simple Java application"
 
-# working directory
+# BASE IMAGE - which provides the working environment
+FROM openjdk:17-jdk-alpine
+
+#WORKING DIRECTORY - on which directory will my container run.... if it is copied from source
 WORKDIR /app
 
-# Copy source code into the container
-COPY src/Main.java /app/Main.java
+# Copy the source code from HOST to working directory
+COPY . .
 
-# Compile the Java code
-RUN javac Main.java
+# Install timezone data using Alpine Package Manager
+RUN apk add --no-cache tzdata
 
-# Run the Java application when the container starts
+# Set timezone equal to IST
+ENV TZ=Asia/Kolkata
+
+# Compile the code
+RUN javac src/Main.java -d /app
+
+# Run the Application
 CMD ["java", "Main"]
+

src/Main.java

@@ -1,8 +1,17 @@
+import java.text.SimpleDateFormat;
 import java.util.Date;
+import java.util.TimeZone;
 
 public class Main {
     public static void main(String[] args) {
-        Date currentDate = new Date();
+        Date now = new Date();
+
+        SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss z");
+
+        sdf.setTimeZone(TimeZone.getTimeZone("Asia/Kolkata"));
+
+        String currentDate = sdf.format(now);
+
         System.out.println("Hello, Docker! Current date: " + currentDate);
     }
 }