# Install required packages
RUN set -x \
 && yum update -y \
 && yum install -y \
    wget \
    nc \
    unzip \
 && yum clean -y all

RUN set -ex \
 && wget -q https://download.java.net/java/early_access/jdk11/28/GPL/openjdk-11+28_linux-x64_bin.tar.gz \
 && tar zxf openjdk-11+28_linux-x64_bin.tar.gz -C /usr/local \
 && alternatives --install /usr/bin/java java /usr/local/jdk-11/bin/java 1 \
 && alternatives --install /usr/bin/jar jar /usr/local/jdk-11/bin/jar 1 \
 && alternatives --install /usr/bin/javac javac /usr/local/jdk-11/bin/javac 1 \
 && alternatives --set jar /usr/local/jdk-11/bin/jar \
 && alternatives --set javac /usr/local/jdk-11/bin/javac \
 && rm -rf openjdk-11+28_linux-x64_bin.tar.gz

ENV JAVA_HOME=/usr/local/jdk-11
ENV PATH=$PATH:/usr/local/jdk-11/bin