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目前分類:JAVAt程式設計-GWT (6)

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Just a quick question, how would you go about initializing a new ArrayList in a constructor which takes its values as parameters?

For example say I have a class which has an ArrayList of strings called bookings. I've already written a constructor which sets all fields to default values, so sets bookings to a new ArrayList of strings. However, the task I've been given is to write a second constructor which uses parameters to set the field values instead of setting them to defaults. This is fine for all my other fields, but how would I do this with the ArrayList?

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Frank 發表在 痞客邦 PIXNET 留言(0) 人氣()

Question:

I have one small problem i.e. one textbox is their when click on the text box the popup is shows below the text box.The popup contains celltable

i write keypresslisner for textbox when i press Down And UP arrow the focus is set to be cellTable And also we still press down and up arrows its highlites the rows in celltable

Ans:

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Frank 發表在 痞客邦 PIXNET 留言(0) 人氣()

Q:

I am developing a GWT application that render a text on a canvas. I want to resize the canvas whenever browser window resized. The problem is if I used Window.addResizeHandler, the rendering process with each resize will be very slow. So I need a way to resize the canvas only when the user release the mouse button after finishing resize. Is there anyway to do that?

A:

You could add a delay, so that the resize is only processed after the window hasn't been resized for some number of milliseconds:

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Frank 發表在 痞客邦 PIXNET 留言(0) 人氣()

Q: Using GWT 1.6.4, I have the following code to retrieve the dimensions of the browser window:

RootPanel panel = RootPanel.get();

int height = panel.getOffsetHeight(); 

int width = panel.getOffsetWidth();

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Frank 發表在 痞客邦 PIXNET 留言(0) 人氣()

Java 日期轉字串範列

1.//目前時間
2.Date date = new Date();
3.//設定日期格式

Frank 發表在 痞客邦 PIXNET 留言(0) 人氣()

I assumed the new date picker would entail also an edit field (based on readings in the corresponding wiki).

However this is not the case and you need to display it yourself on a panel. Ok admitted; it is better to have the flexibility to customize it yourself. For those – who like me are a bit rusty on their GWT – a sample piece of code of how to create a button with a popup panel containing the date picker and showing the date in a text box:

It is similar to the sample app that the webAppCreator cmd creates; it assumes an html with two elements defined.

##--CODE_START--##

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Frank 發表在 痞客邦 PIXNET 留言(0) 人氣()

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