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) {
           
        }

    }
}