: Tools like SDKMAN! (for macOS, Linux) allow you to easily switch between different versions of Java on your system.
: If you're working in a containerized environment, you can create or find a Docker image with Java 1.4.0 for your needs. java 1.4 0 download
To download Java 1.4.0 (also known as J2SE 1.4.0), you must access the Oracle Java Archive : Tools like SDKMAN
Yes, on Windows and Linux. Use full paths to the executables ( C:\jdk1.4.0\bin\java.exe ) or manipulate PATH and JAVA_HOME temporarily. Modern Java installers do not overwrite old versions. : Tools like SDKMAN! (for macOS
