Java Runtime Environment Linux !!exclusive!! 🆒

sudo dnf install java-17-openjdk

grant codeBase "file:/app/*" permission java.io.FilePermission "/var/log/*", "read,write"; ; Create custom JREs containing only required modules: java runtime environment linux

sudo pacman -S jre-openjdk wget https://github.com/adoptium/temurin17-binaries/releases/.../OpenJDK17U-jre_x64_linux_hotspot.tar.gz sudo tar -xzf OpenJDK17U-jre_x64_linux_hotspot.tar.gz -C /usr/lib/jvm/ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-17.0.12+7-jre/bin/java 1 3.3 Managing Multiple JRE Versions Use update-alternatives to switch between JREs: On Linux, the JRE is especially critical given

sudo apt update sudo apt install openjdk-17-jre-headless # For headless servers sudo apt install openjdk-17-jre # Full desktop support and embedded systems (e.g.

#!/bin/bash # Measure JRE startup time time java -version # Measure GC performance java -Xms1g -Xmx1g -XX:+PrintGCDetails -jar benchmark.jar

Java Runtime Environment, Linux, JVM, OpenJDK, Garbage Collection, Headless Mode, Containerization, Performance Tuning 1. Introduction “Write Once, Run Anywhere” (WORA) is the Java platform’s enduring promise. The Java Runtime Environment (JRE) is the concrete implementation of this abstraction, providing the libraries, class loaders, and virtual machine necessary to execute compiled Java bytecode. On Linux, the JRE is especially critical given Linux’s dominance in server, cloud, and embedded systems (e.g., Android’s Linux kernel, enterprise backends).

| GC Algorithm | Throughput (ops/sec) | Avg Pause (ms) | Max Pause (ms) | |--------------|----------------------|----------------|----------------| | G1GC (default) | 12,450 | 18 | 45 | | Parallel GC | 14,200 | 62 | 210 | | ZGC (experimental) | 11,980 | 2 | 8 | | Shenandoah | 12,100 | 4 | 15 |