ScriptEngineManager().getEngineByName(nashorn);判断字符串

是否是JavaScript语言的代码，怎么实现？

回答：是的，这段字符串是JavaScript语言的代码。要判断一个字符串是否是JavaScript语言的代码，可以使用Java中的ScriptEngineManager和ScriptEngine类来实现。具体代码如下：

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Main {
    public static void main(String[] args) throws ScriptException {
        String code = "ScriptEngineManager().getEngineByName(nashorn);";
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("JavaScript");
        boolean isJavaScriptCode = false;
        try {
            engine.eval(code);
            isJavaScriptCode = true;
        } catch (ScriptException e) {
            // This is not JavaScript code.
        }
        System.out.println(isJavaScriptCode);
    }
}