OpenJDK: Difference between revisions

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OpenJDK is an free implementation of Java for Linux, Solaris and Windows.^[1] There is also OpenJDK for BSD^[2]. Several BSD and Linux distros carry packages of OpenJDK.

OpenJDK can compile and run Java programs. OpenJDK 6 implements Java 6, while OpenJDK 7 is a preview of future Java 7.

Usage

OpenJDK is a set of command-line tools. If OpenJDK is installed in /usr/local/jdk-1.7.0, then /usr/local/jdk-1.7.0/bin needs to be added to the PATH environment variable. The two most important tools are the javac compiler, and the java runner.

This example program would compute 12 - 4.

/* TwelveMinusFour.java */
public class TwelveMinusFour {
	public static void main(String[] args) {
		System.out.println(12 - 4);
	}
}

One can compile this program with javac, and run it with java.

$ javac TwelveMinusFour.java
$ java TwelveMinusFour
8

References

[1] OpenJDK Build README: Minimum Build Environments

[2] OpenJDK: BSD Port Project

[1]

[2]

Revision as of 05:58, 20 August 2012 (view source) Eriksiers (talk \| contribs) m (rephrased first "Usage" paragraph; bolded first occurrence of name; added Java link) ← Older edit		Latest revision as of 08:34, 21 July 2023 (view source) Katsumi a.k.a. Upperdecker2562 (talk \| contribs) (→‎Usage)
(One intermediate revision by one other user not shown)
Line 1: {{implementation\|Java}} '''[http://openjdk.java.net/ OpenJDK]''' is an [[open source\|free]] implementation of [[:Category:Java\|Java]] for [[Linux]], [[Solaris]] and [[Windows]].<ref>[http://hg.openjdk.java.net/jdk7/build/raw-file/tip/README-builds.html#MBE OpenJDK Build README: Minimum Build Environments]</ref> ~~There is also OpenJDK for [[BSD]]<ref>[http://openjdk.java.net/projects/bsd-port/ OpenJDK: BSD Port Project]</ref>. Several BSD and Linux distros carry packages of OpenJDK.~~ There is also OpenJDK for [[BSD]]<ref>[http://openjdk.java.net/projects/bsd-port/ OpenJDK: BSD Port Project]</ref>. Several BSD and Linux distros carry packages of OpenJDK. OpenJDK can compile and run Java programs. ~~OpenJDK 6 implements Java 6, while OpenJDK 7 is a preview of future Java 7.~~ OpenJDK 6 implements Java 6, while OpenJDK 7 is a preview of future Java 7. == Usage == OpenJDK is a set of command-line tools. ~~OpenJDK is a set of command-line tools.~~ If OpenJDK is installed in <ttkbd>/usr/local/jdk-1.7.0</ttkbd>, then <ttkbd>/usr/local/jdk-1.7.0/bin</ttkbd> needs to be added to the <ttkbd>PATH</ttkbd> environment variable. ~~The two most important tools are the [[javac]] compiler, and the java runner.~~ The two most important tools are the [[javac]] compiler, and the java runner. This example program would compute 12 - 4. <syntaxhighlight lang="java"> ~~<lang java>~~/* TwelveMinusFour.java */ public class TwelveMinusFour { public static void main(String[] args) { System.out.println(12 - 4); } } ~~}</lang>~~ </syntaxhighlight> One can compile this program with <kbd>javac</kbd>, and run it with <kbd>java</kbd>. <syntaxhighlight lang="bash"> ~~<lang bash>$ javac TwelveMinusFour.java~~ $ ~~java~~javac TwelveMinusFour .java $ java TwelveMinusFour ~~8</lang>~~ 8 </syntaxhighlight> == References ==