android studio if webview web page not available then open in google code example

Example: webview in android studio

private WebView webView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        webView = (WebView) findViewById(R.id.webview);
        webView.setWebViewClient(new WebViewClient());
        webView.loadUrl("https://www.javatpoint.com/java-tutorial");

        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);

    }
    @Override
    public void onBackPressed() {
        if (webView.canGoBack()) {
            webView.goBack();
        } else {
            super.onBackPressed();
        }
    }