The environment is a label and and next to that is a list box in a horizontal panel. How can I reduce the space between these two? I tried with set spacing to 0 it doesn't seem to work.
And is there any way where I can add the title without using labels?
Here you go
Horizontal Panel will create an table and if you gave the width on the panel with in that width widget will share the equal space .
So
Set the display type block
so they will arrange in side by side in the whole width
HorizontalPanel panel = new HorizontalPanel();
panel.setWidth("70%");
panel.getElement().getStyle().setDisplay(Display.BLOCK);
panel.add(new Label("Lable"));
panel.add(listbox);
RootPanel.get().add(panel);