***Java2Script: How It Works***

**java2script/SwingJS**

The full java2script/SwingJS operation involves two parts: Creating the JavaScript from the abstract syntax tree (java2script), and running that within the browser (SwingJS). Both are discussed below.

net.sf.j2s.core java2script transpiler

net.sf.j2s.java.core SwingJS runtime

**java2script transpiler**

A compiler converts code in one computer language to another. Typically this is from a higher-level language to a lower-level "machine code" language. In the case of the Java compiler, this is from written Java code (*.java) to "Java byte code" (*.class). In the case of of java2script, this is from Java to JavaScript. There are two basic requirements of a compiler: reading and writing. The reading process involves converting the written Java code to an <i>abstract syntax tree</i> [https://en.wikipedia.org/wiki/Abstract_syntax_tree]. The writing process involves scanning that tree, creating one or more output files from the original input file.

protected String j2sPath;

protected String excludedPaths;

protected List<String> lstExcludedPaths;

protected boolean isCleanBuild;

}

}

protected Java2ScriptCompiler(boolean isSwingJS, String j2sConfigFileName) {

this.isSwingJS = isSwingJS;

this.j2sConfigFileName = j2sConfigFileName;

// initialized only once for SwingJS and once for legacy version

}

writeToFile(f, js);

}

try {

StringBuilder sb = new StringBuilder();

FileInputStream is = new FileInputStream(file);

File f = null;

if (files != null)

try {

for (int i = 0; i < files.length; i++) {

f = files[i];

if (f == null) {

//

copiedResourcePackages.add(path);

n++;

StandardCopyOption.REPLACE_EXISTING);

if (isDebugging)

}

}

}

return n;

}

int pt = packageName.indexOf(".");

if (pt >= 0)

packageName = packageName.substring(0, pt);

}

String sourceDir = sourceLocation.substring(0, pt);

File src = new File(sourceDir, packageName);

return copySiteResources(src, dest);

}

}

}