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Java HotSpot(TM) 64-Bit Server VM (build 15.0.1+9, mixed mode, sharing) Java(TM) SE Runtime Environment (build 15.0.1+9-18) Display the JDK version javac -version javac 15.0.1 // Display the JRE version java -version java version "15.0.1" Issue the following commands to verify that JDK/JRE are properly installed and display their version:.

#Java version command for mac download

Download the "Windows 圆4 Installer" (e.g., " jdk-15.0.

Under "Oracle JDK", click "JDK Download".

Goto "Control Panel" ⇒ (optional) "Programs" ⇒ "Programs and Features" ⇒ Un-install ALL programs begin with "Java", such as "Java SE Development Kit. If you have previously installed older version(s) of JDK/JRE, un-install ALL of them.

#Java version command for mac install

Although you can install multiple versions of JDK/JRE concurrently, it is messy. I recommend that you install only the latest JDK.

#Java version command for mac how to

How To Install JDK on Windows Step 0: Un-Install Older Version(s) of JDK/JRE Since you are supposed to write Java Programs instead of merely running Java programs, you should install JDK, which includes JRE.

#Java version command for mac plus

JDK (Java Development Kit), which includes JRE plus the development tools (such as compiler and debugger), is need for writing as well as running Java programs. JRE (Java Runtime), which include a Java Virtual Machine and core libraries, is needed for running Java programs.

Java SE 13 (19.9) (JDK 13) (September 2019): Switch Expression (preview), Multi-line Text Block (preview).

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OracleJDK is no longer free for commercial use, but OpenJDK is still free. Clean up the JDK and the installation package (removed JavaFX, JavaEE, CORBA modules, deprecated Nashorn JavaScript engine).

Java SE 11 LTS (18.9) (JDK 11) (September 2018): Extended var to lambda expression.

Removed native-header generation tool javah. Introduced time-based release versioning with two releases each year, in March and September, denoted as YY.M.

Java SE 10 (18.3) (JDK 10) (March 2018): Introduced var for type inference local variable (similar to JavaScript).

Java SE 9 (JDK 9) (September 21, 2017): Introduced modularization of the JDK ( module) under project Jigsaw, the Java Shell ( jshell), and more.

Also integrated JavaFX graphics subsystem.

Java SE 8 LTS (JDK 8) (March 2014): Included support for Lambda expressions, default and static methods in interfaces, improved collection, and JavaScript runtime.

Introduced Strings in switch statement, Binary integer literals, allowing underscores in numeric literals, improved type inference for generic instance creation (or diamond operator ), Catching multiple exception types and rethrowing exceptions with improved type checking.

Java SE 7 (JDK 7) (July 2011): First version after Oracle purchased Sun Microsystem - aslo called OracleJDK.

Java SE 6 (JDK 6) (December 2006): Renamed J2SE to Java SE (Java Platform Standard Edition).

Introduced generics, autoboxing/unboxing, annotation, enum, varargs, for-each loop, static import.

J2SE 5.0 (JDK 5) (September 2004): Officially called 5.0 instead of 1.5 (by dropping the 1.).

J2SE 1.4 (JDK 1.4) (February 2002): Introduced assert statement, non-blocking IO ( nio), logging API, image IO, Java webstart, regular expression (regex) support.

Also introduced Collection Framework and JIT compiler. Included JFC (Java Foundation Classes - Swing, Accessibility API, Java 2D, Pluggable Look & Feel, and Drag & Drop).

Also released J2EE (Java 2 Enterprise Edition) and J2ME (Java 2 Micro Edition).

J2SE 1.2 (JDK 1.2) (December 1998): Re-branded as "Java 2" and renamed JDK to J2SE (Java 2 Standard Edition).

JDK 1.1 (February 1997): Introduced AWT event model, inner class, JavaBean, JDBC, and RMI.JDK 1.0 (January 1996): Originally called Oak (named after the oak tree outside James Gosling's office).JDK Alpha and Beta (1995): Sun Microsystem announced Java in September 23, 1995.This article is based on the Oracle JDK ) (due to legacy), which is free for personal and development use but no longer free for commercial use. The Java Development Kit (JDK), officially named "Java Platform Standard Edition" or "Java SE", is needed for writing and running Java programs.Ĭurrently, the OpenJDK developed by Oracle and the Java community ) provides a free and open-source JDK official reference implementation.