Run a simple java command on Ubuntu and hits the below errors: Terminal $ java -version bash: /usr/bin/java: cannot execute binary file: Exec format error P.S Tested with Java 15 and Ubuntu 20 1. Problem – Download the wrong JDK build The error Exec format error means we download the wrong JDK build for a […]
On Ubuntu, we can add JAVA_HOME environment variable in /etc/environment file. Note /etc/environment system-wide environment variable settings, which means all users use it. It is not a script file, but rather consists of assignment expressions, one per line. We need admin or sudo to modify this it. Further Reading Ubuntu – EnvironmentVariables 1. JAVA_HOME 1.1 […]
This article shows how to install Java JDK on macOS, Homebrew package manager, manual installation, and switch between different JDK versions. Tested with macOS 11 Big Sur Homebrew 2.7.4 JDK 8, 14, 16, 16 (AdoptOpenJDK and OpenJDK) Topics Homebrew install latest Java (OpenJDK) on macOS Homebrew install Java 8 (OpenJDK) on macOS Homebrew install a […]
This article shows how to set the $JAVA_HOME environment variable on older Mac OS X and the latest macOS 11. Topics macOS release history What is /usr/libexec/java_home $JAVA_HOME and macOS 11 Big Sur $JAVA_HOME and Mac OS X 10.5 Leopard $JAVA_HOME and older Mac OS X Switch between different JDK versions Solution Steps to set […]
In the Terminal, we can use `javac -version` to check the installed JDK version and `java -version` to check the installed JRE version.
This tutorial shows you how to install OpenJDK 8, 11, 16, and other JDK builds on Ubuntu 20. 1. APT Install JDK (OpenJDK 8 and 11) 2. Install JDK manually (OpenJDK 16) 3. Install Oracle JDK on Ubuntu 4. Switch between different JDK versions 5. Add JAVA_HOME to Ubuntu environment variable 6. References 1. APT […]
