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JavaScript Compiler
The JavaScript compiler translates JavaScript source into Java class files.
The resulting Java class files can then be loaded and executed at another
time, providing a convenient method for transfering JavaScript, and for
avoiding translation cost.
Invoking the Compiler
java org.mozilla.javascript.tools.jsc.Main [options] file1.js
[file2.js...]
where options are:
-extends java-class-name
Specifies that a java class extending the Java class java-class-name
should be generated from the incoming JavaScript source file. Each global
function in the source file is made a method of the generated class, overriding
any methods in the base class by the same name.
-implements java-intf-name
Specifies that a java class implementing the Java interface
java-intf-name should be generated from the incoming JavaScript
source file. Each global function in the source file is made a method of
the generated class, implementing any methods in the interface by the same
name.
-debug
-g
Specifies that debug information should be generated. May not be combined
with optimization at an optLevel greater than zero.
-nosource
Does not save the source in the class file. Functions and scripts compiled
this way cannot be decompiled. This option can be used to avoid distributing
source or simply to save space in the resulting class file.
-o outputFile
Writes the class file to the given file (which should end in .class).
The string outputFile must be a writable filename.
-opt optLevel
-O optLevel
Optimizes at level optLevel, which must be an integer between
-1 and 9. See Optimization for more details. If
optLevel is greater than zero, -debug may not be specified.
-package packageName
Specifies the package to generate the class into. The string packageName
must be composed of valid identifier characters optionally separated by
periods.
-version versionNumber
Specifies the language version to compile with. The string versionNumber
must be one of 100, 110, 120, 130,
or 140. See JavaScript Language
Versions for more information on language versions.
Examples
$ cat test.js
java.lang.System.out.println("hi, mom!");
$ java org.mozilla.javascript.tools.jsc.Main test.js
$ ls *.class
test.class
$ java test
hi, mom!
$ java org.mozilla.javascript.tools.jsc.Main -extends java.applet.Applet
\
-implements java.lang.Runnable NervousText.js
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