A DESCRIPTION OF THE PROBLEM :
The provided sample implementation of the method getProgram is simply contains syntax error. It is a mix of PHP and Java.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
    public String getProgram(String... statements) {
        int len = 0;
        for (String line : statements) {
            len += 1 + line.length();
        }
        StringBuilder sb = new StringBuilder(len);
        for( String line : statements){
            sb.append(line).append("\n");
        }
        return sb.toString();
    }
ACTUAL -
public String getProgram(String... statements) {
      $retval = "<?\n";
      int len = statements.length;
      for (int i = 0; i < len; i++) {
          $retval += statements[i] + ";\n";
      }
      $retval += "?>";

 }

URL OF FAULTY DOCUMENTATION :
http://docs.oracle.com/javase/6/docs/api/javax/script/ScriptEngineFactory.html#getProgram%28java.lang.String...%29