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that are not constants. Second, an interface cannot implement any methods. A class that implements an interface
must implement all methods defined in that interface. An interface has the ability to extend from other interfaces,
and (unlike classes) can extend from multiple interfaces. Furthermore, an interface cannot be instantiated with the
new operator; for example, Runnable a=new Runnable(); is not allowed.
javac
Developer(s) Sun Microsystems
Stable release 1.6.0_14 / May 28, 2009
Operating
system
Cross-platform
Type Compiler
License GNU General Public License
Website [1]
javac (pronounced "java-see") is the primary Java compiler, included in the Java Development Kit (JDK) from Sun
Microsystems.
The compiler accepts source code conforming to the Java language specification (JLS) and produces bytecode
conforming to the Java Virtual Machine Specification (JVMS).
javac is itself written in Java. The compiler can also be invoked programmatically. [2]
History
On 13 November 2006, Sun's Java Virtual Machine (JVM) and Java Development Kit (JDK) were made available [3]
under the GPL license (see Sun's OpenJDK Hotspot page [4] ).
Since version 0.95, GNU Classpath, a free implementation of the standard class library for Java, supports compiling
and running javac using the Classpath runtime (GIJ) and compiler (GCJ), and also allows one to compile the GNU
Classpath class library, tools and examples with javac itself [5] .
See also
• Java compiler for a general presentation of Java compilers, and a list of other existing alternative compilers.
• Java (programming language)
• Java Platform
• OpenJDK
External links
• Sun's OpenJDK javac page [6]
• The Java Virtual Machine Specification [7]
• JSR 199 [5] Java Compiler API Java Specification Request for invoking the Java compiler from a Java program