• ScriptEngine.ENGINE
• ScriptEngine.ENGINE_VERSION
• ScriptEngine.LANGUAGE
• ScriptEngine.LANGUAGE_VERSION
• ScriptEngine.NAME

The values for these keys are the Strings returned by getEngineName, getEngineVersion, getLanguageName, getLanguageVersion for the first four keys respectively. For NAME, one of the Strings returned by getNames is returned.

A reserved key, THREADING, whose value describes the behavior of the engine with respect to concurrent execution of scripts and maintenance of state is also defined. These values for the THREADING key are:

• null - The engine implementation is not thread safe, and cannot be used to execute scripts concurrently on multiple threads.
• "MULTITHREADED" - The engine implementation is internally thread-safe and scripts may execute concurrently although effects of script execution on one thread may be visible to scripts on other threads.
• "THREAD-ISOLATED" - The implementation satisfies the requirements of "MULTITHREADED", and also, the engine maintains independent values for symbols in scripts executing on different threads.
• "STATELESS" - The implementation satisfies the requirements of "THREAD-ISOLATED". In addition, script executions do not alter the mappings in the Bindings which is the engine scope of the ScriptEngine. In particular, the keys in the Bindings and their associated values are the same before and after the execution of the script.

 public String getMethodCallSyntax(String obj,
                                   String m, String... args) {
      String ret = obj;
      ret += "." + m + "(";
      for (int i = 0; i < args.length; i++) {
          ret += args[i];
          if (i < args.length - 1) {
              ret += ",";
          }
      }
      ret += ")";
      return ret;
 }
  

 public String getOutputStatement(String toDisplay) {
      return "print(" + toDisplay + ")";
 }
 

 public String getProgram(String... statements) {
      String retval = "<?\n";
      int len = statements.length;
      for (int i = 0; i < len; i++) {
          retval += statements[i] + ";\n";
      }
      return retval += "?>";
 }