WebViewClient onReceivedError IF（）不起作用

Question

我有这个代码，它不起作用：

if (desctiption == "net :: ERR_INVALID_ARGUMENT" ") 

相反，如果我写

if (desctiption! =" Net :: ERR_INVALID_ARGUMENT "") 

我创建了Toast对象，文本等于

net: : ERR_INVALID_ARGUMENT

代码：

webView.setWebViewClient(new WebViewClient() {


        @Override
        public void onReceivedError(WebView view, int errorCode,
                                    String description, String failingUrl) {
            super.onReceivedError(view, errorCode, description, failingUrl);


            Toast toast = Toast.makeText(getBaseContext(),description, Toast.LENGTH_LONG);

            if (description == "net::ERR_INVALID_ARGUMENT"){
            toast.show();}



        }


    });
}