java;">package scc;import javax.script.ScriptEngine;import javax.script.ScriptEngineManager;import javax.script.ScriptException;public class Counter {	public static void main(String[] args) {		// TODO Auto-generated method stub		ScriptEngineManager manager = new ScriptEngineManager();		ScriptEngine SE = manager.getEngineByName("js");		String Numbers = new String("1+2/5");		try {			String ans = SE.eval(Numbers).toString();			System.out.println(ans);		}		catch (ScriptException e) {			e.printStackTrace();		}	}}

ScriptEngineManger sem = new ScriptEngineManger();/*script引擎管理*/ScriptEngine se= sem.getEngineByName("JavaScript");/*script引擎*/JTextField tf = new JTextField(10);try    {	System.out.println (se.eval ("2+2"));	/* 執行一段script 打印結果*/	tf.setText(se.eval(tf.getText()).tostring);	//將運算結果顯示到文本框,類似計時器效果}catch (ScriptException e)    {	System.out.println ("算術式出錯！");}