java字符串运算

public class formula{        static ScriptEngine jse = new ScriptEngineManager().getEngineByName("JavaScript");        public static void main(String[] args) {          String formula = "1+1*2+(10-(2*(5-3)*(2-1))-4)+10/(5-0)";          try {              System.out.println(jse.eval(formula));          } catch (Exception t) {          }      }  }