java JButton数组 scriptengine解析表达式

swing事件组JButton以数组方式初始化:

JButton[ ] a=new JButton[10];for(int i=0;i<a.length;i++)  a[i]=new JButton(" "+i);

scriptengine解析表达式:

import javax.script.*;

String str="2+6%7";

ScriptEngine se=new ScriptEngineManager().getEngineByName("JavaScript");

try{

double d=(Double)se.eval(str);

System.out.println("result="+d);

}catch(ScriptException e){System.out.println("error");}