Some hacks

Author: ayushtkn

dev-support/docker/Dockerfile_centos_7

@@ -85,10 +85,15 @@ RUN yum install -y wget && \
     wget https://download.oracle.com/java/17/archive/jdk-17.0.12_linux-x64_bin.tar.gz && \
     mkdir -p /usr/lib/jvm && \
     tar -xzf jdk-17.0.12_linux-x64_bin.tar.gz -C /usr/lib/jvm && \
-    rm -f jdk-17.0.12_linux-x64_bin.tar.gz
+    rm -f jdk-17.0.12_linux-x64_bin.tar.gz && \
+    alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-17.0.12/bin/java 1 && \
+    alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-17.0.12/bin/javac 1 && \
+    alternatives --set java /usr/lib/jvm/jdk-17.0.12/bin/java && \
+    alternatives --set javac /usr/lib/jvm/jdk-17.0.12/bin/javac
 
-# Set JAVA_HOME
+# Set JAVA_HOME and update PATH
 ENV JAVA_HOME=/usr/lib/jvm/jdk-17.0.12
+ENV PATH="$JAVA_HOME/bin:$PATH"
 
 
 #######