Step-by-step – Oracle JRE 7 Installation in Debian Buster

Installing

2. 2. Downloading Oracle JRE 7

   Download Oracle Java SE JRE7 for Linux.

   Oracle JRE7 i586/x8664 tar.gz

   Select Oracle JRE 7 for Linux

3. 3. Extracting Oracle JRE 7

   Then Extract into /tmp
   Possibly Double-Click/Right-Click on JRE 7 Archive to Open.

   

   Or from the CLI run:

   tar xvzf ~/Downloads/jre*.tar.gz -C /tmp

   But if you are in Trouble to Find the Location on Terminal then See: How to Access Downloads Folder from Browser.

4. 4. Installing Oracle JRE 7

   Then Relocate Oracle Java JRE 7.

   To Make a jvm Directory Only if Not already there:
   (You can directly copy & paste the commands into the terminal)

   su -c "if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; fi"

   Now to Set the root superUser as owner

   su -c "chown -R root:root /tmp/jdk1.7*"

   Then to shift the Oracle JDK 7 contents

   su -c "mv /tmp/jdk1.7* /usr/lib/jvm/"
   

   Finally, to Setup Oracle Java JRE 7.

   su -c "update-alternatives --install /usr/bin/java java /usr/lib/jvm/jre1.7*/bin/java 1065"
   

   su -c "update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jre1.7*/bin/javaws 1065"
   

   Checking or Setting the System Java Version in Use
   with

   su -c "update-alternatives --config java"

   And for the Java Compiler instead:

   su -c "update-alternatives --config javac"

   To Switch of Java Version Just Enter the Selection Number on First, Column. :)

Now Thanks to Oracle-Sun Corporation you are able to Successfully Start with Java JRE 7 Use & Development.