Thank you. I get it now.
On Apr 23, 9:56 pm, Adam T <adam.t...@gmail.com> wrote:
> If this is client side code, you can't use java.net as the code gets
> compiled to JavaScript - I'd suggest you read the documentation for
> GWT to get a feel of what you can and can't do, in particular what is
> included in the JRE Emulation for
> GWT:http://code.google.com/intl/sv-SE/webtoolkit/doc/1.6/RefJreEmulation....
>
> You should also check you the RequestBuilder class which allows you to
> make calls to a server from your code, BUT, as this will be from a
> browser you will need to be aware of the Single Origin Policy - i.e.
> your code can only make a call back to the server from which it came.
> So in your case, if your GWT application is served from
> hellworld.appspot.com your would be ok, if not, then you can't.
>
> //Adam
>
> On 24 Apr, 04:41, satish <satish...@gmail.com> wrote:
>
> > I am using GWT plugin for eclipse and trying to build an test
> > application to be deployed on app engine. I am relatively new to Java
> > and App Engine. I have import java.net.* statement declared but when I
> > run the program in hosted browser mode, I get the error - Line 5: The
> > import java.net cannot be resolved. I don't get any error for java.io
> > or java.util.ArrayList imports. What am i doing wrong? Thank you.
>
> > Here is the program. getJoke() method needs classes from java.net.
>
> > package com.google.gwt.sample.stockwatcher.client;
>
> > import java.io.*;
> > import java.net.*;
> > import java.util.ArrayList;
>
> > import com.google.gwt.core.client.EntryPoint;
> > import com.google.gwt.event.dom.client.ClickEvent;
> > import com.google.gwt.event.dom.client.ClickHandler;
> > import com.google.gwt.event.dom.client.KeyCodes;
> > import com.google.gwt.event.dom.client.KeyPressEvent;
> > import com.google.gwt.event.dom.client.KeyPressHandler;
> > import com.google.gwt.user.client.Window;
> > import com.google.gwt.user.client.ui.Button;
> > import com.google.gwt.user.client.ui.FlexTable;
> > import com.google.gwt.user.client.ui.HorizontalPanel;
> > import com.google.gwt.user.client.ui.Label;
> > import com.google.gwt.user.client.ui.RootPanel;
> > import com.google.gwt.user.client.ui.TextBox;
> > import com.google.gwt.user.client.ui.VerticalPanel;
>
> > public class StockWatcher implements EntryPoint {
>
> > private VerticalPanel mainPanel = new VerticalPanel();
> > private FlexTable stocksFlexTable = new FlexTable();
> > private HorizontalPanel addPanel = new HorizontalPanel();
> > private TextBox newSymbolTextBox = new TextBox();
> > private Button addStockButton = new Button("Add");
> > private Label lastUpdatedLabel = new Label();
> > private ArrayList<String> stocks = new ArrayList<String>();
> > private TextBox jokeTextBox = new TextBox();
> > private Button getJokeButton = new Button("Get Joke");
> > private HorizontalPanel jokePanel = new HorizontalPanel();
>
> > /**
> > * Entry point method.
> > */
> > public void onModuleLoad() {
> > // Create table for stock data.
> > stocksFlexTable.setText(0, 0, "Symbol");
> > stocksFlexTable.setText(0, 1, "Price");
> > stocksFlexTable.setText(0, 2, "Change");
> > stocksFlexTable.setText(0, 3, "Remove");
>
> > // Assemble Add Stock panel.
> > addPanel.add(newSymbolTextBox);
> > addPanel.add(addStockButton);
>
> > //Assmeble Joke Panel
> > addPanel.add(getJokeButton);
> > addPanel.add(jokeTextBox);
>
> > // Assemble Main panel.
> > mainPanel.add(stocksFlexTable);
> > mainPanel.add(addPanel);
> > mainPanel.add(jokePanel);
> > mainPanel.add(lastUpdatedLabel);
>
> > // Associate the Main panel with the HTML host page.
> > RootPanel.get("stockList").add(mainPanel);
>
> > // Move cursor focus to the input box.
> > newSymbolTextBox.setFocus(true);
> > // Listen for mouse events on the Add button.
> > addStockButton.addClickHandler(new ClickHandler() {
> > public void onClick(ClickEvent event) {
> > addStock();
> > }
> > });
>
> > // Listen for keyboard events in the input box.
> > newSymbolTextBox.addKeyPressHandler(new KeyPressHandler() {
> > public void onKeyPress(KeyPressEvent event) {
> > if (event.getCharCode() == KeyCodes.KEY_ENTER) {
> > addStock();
> > }
> > }
> > });
>
> > // Listen for mouse events on the getJoke button.
> > getJokeButton.addClickHandler(new ClickHandler() {
> > public void onClick(ClickEvent event) {
> > getJoke();
> > }
> > });
>
> > }
>
> > /**
> > * Add stock to FlexTable. Executed when the user clicks the
> > addStockButton or
> > * presses enter in the newSymbolTextBox.
> > */
> > private void addStock() {
> > final String symbol =
> > newSymbolTextBox.getText().toUpperCase
> > ().trim();
> > newSymbolTextBox.setFocus(true);
>
> > // Stock code must be between 1 and 10 chars that are
> > numbers,
> > letters, or dots.
> > if (!symbol.matches("^[0-9a-zA-Z\\.]{1,10}$")) {
> > Window.alert("'" + symbol + "' is not a valid
> > symbol.");
> > newSymbolTextBox.selectAll();
> > return;
> > }
>
> > newSymbolTextBox.setText("");
>
> > // Don't add the stock if it's already in the table.
> > if (stocks.contains(symbol))
> > return;
>
> > // Add the stock to the table.
> > int row = stocksFlexTable.getRowCount();
> > stocks.add(symbol);
> > stocksFlexTable.setText(row, 0, symbol);
>
> > // Add a button to remove this stock from the table.
> > Button removeStockButton = new Button("x");
> > removeStockButton.addClickHandler(new ClickHandler() {
> > public void onClick(ClickEvent event) {
> > int removedIndex = stocks.indexOf(symbol);
> > stocks.remove(removedIndex);
> > stocksFlexTable.removeRow(removedIndex + 1);
> > }
> > });
> > stocksFlexTable.setWidget(row, 3, removeStockButton);
>
> > // TODO Get the stock price.
>
> > }
>
> > private void getJoke() {
> > //jokeTextBox.setText("Joke Button Clicked");
>
> > try {
> > String message = URLEncoder.encode("joke",
> > "UTF-8");
> > URL url = new URL("http://hellworld.appspot.com";);
> > HttpURLConnection connection = (HttpURLConnection)
> > url.openConnection();
> > connection.setDoOutput(true);
> > connection.setRequestMethod("POST");
>
> > OutputStreamWriter writer = new OutputStreamWriter
> > (connection.getOutputStream());
> > writer.write("request=" + message);
> > writer.close();
>
> > if (connection.getResponseCode() ==
> > HttpURLConnection.HTTP_OK) {
> > // OK
> >
> > jokeTextBox.setText(connection.getResponseMessage());
> > } else {
> > // Server returned HTTP error code.
> > jokeTextBox.setText("Error");
> > }
> > } catch (MalformedURLException e) {
> > // ...
> > jokeTextBox.setText("Error");
> > } catch (IOException e) {
> > // ...
> > jokeTextBox.setText("Error");
> > }
>
> > }
>
> > }
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