FROM ubuntu:22.04

ENV DEBIAN_FRONTEND=noninteractive

# Install OpenJDK dan tools dasar
RUN apt-get update && \
    apt-get install -y openjdk-17-jdk && \
    apt-get clean

# Set direktori kerja
WORKDIR /app

# Salin file java
COPY Hello.java .

# Compile file Java
RUN javac Hello.java

# Jalankan program
CMD ["java", "Hello"]