java 计算器算法脚本

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

 public String Count(String s) throws ScriptException{
     ScriptEngineManager sem=new ScriptEngineManager();
     ScriptEngine se=sem.getEngineByName("JavaScript");
     System.out.println(se.eval(s).toString());
     return se.eval(s).toString();

     }