java 1.6 表达式计算方法

 

 


  import
   javax.script.ScriptEngine; 
  import
   javax.script.ScriptEngineManager; 
  import
   javax.script.ScriptException; 
  public
   
  class
   Test{ 
  public
   
  static
   
  void
   main(String[] args) { ScriptEngineManager manager 
  =
   
  new
   ScriptEngineManager(); ScriptEngine engine 
  =
   manager.getEngineByName(
  "
  javascript
  "
  ); 
  try
   { Double d 
  =
   (Double) engine.eval(
  "
  10*5+9-25/2
  "
  ); System.out.println(d); } 
  catch
   (ScriptException ex) { } } }