evaluation

package ch.fhnw.claudemartin;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

class SomeClass {
  public static void main(final String[] args) throws ScriptException {
    final ScriptEngine ecma = new ScriptEngineManager()
        .getEngineByName("nashorn");
    final String go[] = { "1+2", "3+6", "4+5" };

    for (final String x : go) {
      final Object value = ecma.eval(x);
      if (value instanceof Number) {
        final int i = ((Number) value).intValue();
        System.out.printf("integer: %d%n", i);
      } else
        System.out.printf("non-numeric: %s%n", value);
    }
  }
}