Let's change the DateField example a little bit:
Open or import the datefield example in your IDE.
Replace
DateFieldwithInlineDateFieldinDateFieldUI.java.Deploy and run the example.
Study this simple example that displays (in the console) the content of a text file uploaded by the user:
public class UploadUI extends UI implements Receiver {
@Override
protected void init(VaadinRequest request) {
Upload upload = new Upload(
"Select a text file and look at the console",
this);
VerticalLayout layout = new VerticalLayout();
layout.addComponent(upload);
setContent(layout);
}
@Override
public OutputStream receiveUpload(String filename,
String mimeType) {
return new OutputStream() {
@Override
public void write(int b) throws IOException {
System...