How to put old Java (8 series) in macOS 10.15 Catalina


Some tools don't work with Java version 12, and Google search for older Java didn't show useful information at the top, so I'll take a note here.

My environment

macOS 10.15 catalina Java is 12.0.2

% /usr/libexec/java_home

What you want to do

I want to install Java 8 series.

Old Java installation.

This was helpful.

--Procedures for installing Oracle Java 8 (JDK) on macOS

D / L the JDK from the Oracle site. "Java SE Development Kit 8u202"-"Mac OS X x64" was selected.

Make sure that JavaVirtualMachines has 8 series installed.

% /usr/libexec/java_home
% /usr/libexec/java_home -v 1.8

There is 1.8, but since it is newly added, it is only this, so it is probably 8 series. (suitable

Switch to old Java

You can't just install it, you need to switch JAVA_HOME.

I referred to here.

--Switch Java version on OS X

Put the following two lines in your shell settings, such as .profile or .bashrc.

export JAVA_HOME=$(/System/Library/Frameworks/JavaVM.framework/Versions/A/Commands/java_home -v "1.8")

Version confirmation

% source ~/.profile
% java -version
java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)


Even if you search Google by mixing various words centering on "install macOS old Java", it is painful because only the method of ** uninstalling ** old Java appears. .. Sometimes The way to install Java that you can find is no good now.

I melted a good amount of time. I hope that someone who seems to be addicted to it will be saved. ..

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