https://learn-java-25.pages.dev/01-introduction/index.html Get a JDK 25 running, then meet JShell — the fastest way to try Java out. Hugo en https://learn-java-25.pages.dev/01-introduction/00-setup/index.html Mon, 01 Jan 0001 00:00:00 +0000 https://learn-java-25.pages.dev/01-introduction/00-setup/index.html Install the JDK You need the JDK (compiler + tools), not just a JRE. Pick any OpenJDK build: Eclipse Temurin, Amazon Corretto or Oracle OpenJDK. # macOS brew install --cask temurin@25 # Linux sudo apt install openjdk-25-jdk # Windows winget install EclipseAdoptium.Temurin.25.JDK # any platform, several versions side by side sdk install java 25-tem # sdkman.io Verify: https://learn-java-25.pages.dev/01-introduction/01-jshell/index.html Mon, 01 Jan 0001 00:00:00 +0000 https://learn-java-25.pages.dev/01-introduction/01-jshell/index.html JShell is a Read–Eval–Print Loop shipped with the JDK. Use it whenever you want to try something out without creating a file. jshell jshell> 2 + 3 * 4 $1 ==> 14 jshell> var name = "World" name ==> "World" jshell> "Hello, " + name + "!" $3 ==> "Hello, World!" Semicolons are optional. Results without a variable get names like $1, which you can reuse.