/*17.3(Student achievement file) creates a program that saves students ' scores to one by one text files. This file should contain each student's name, ID number, course, and score information. The user should be allowed to manned the file and display its contents in a read-only text box mode. You should have the following format when displaying information:lastnane,firstname:id# Class GradeSome data samples are as follows:Jones,bob:1 "Introduction to Computer Science" "A-"Johnson,sarah:2 "Data
From: http://hi.baidu.com/gglzf4/blog/item/a950a402ff7ae67b3812bba2.html#0
Jfilechooser chooser = new jfilechooser ();Chooser. setfileselectionmode (jfilechooser. directories_only); // you can only select folders.
Jfilechooser filechooser = new jfilechooser ();Filechooser. setfileselectionmode (jfilechooser. files_only); // you can only select files.
Int flag = filechooser. showopendialog (this );If (flag
Function: you can click the button to add three guitar photos at a time and display them in the form according to the proportion.
The Code is as follows:
/*****/Import java. awt. borderLayout; import java. awt. dimension; import java. awt. image; import java. awt. event. actionEvent; import java. awt. event. actionListener; import java. io. file; import javax. swing. *;/*** @ author wangyubin * There is a button in the center of the Frame to open the file. * To be implemented: click the button
We are online shopping to submit orders, on the Web page will generally have a select number of controls, asking buyers to choose the number of items to buy goods, developers will make the control can be achieved by clicking on the addition and subtraction fine-tuning operations, of course, can directly enter the number of pieces. This article describes several common ways to use the spinner digital spinner
JS today took a look at the new Jspinner in JDK1.4, which makes it easy to select dates, numbers, or options in a list.
JSpinner sample
The user uses the move up and down arrows on the component or keyboard to select. They can also enter their own choice. However, unlike JComboBox, JSpinner does not provide Drop-down list selection, so each choice and their order should have a certain meaning.
To use a class, you can simply create a collection of elements for selection (in a list or array),
Introduction
Edition makes creating an ActiveX control key as easy as creating a generic VB application. After reading this article, you will see how easy it is.
This article outlines the simple process of creating an ActiveX control key with VisualBasic. If you are already familiar with the various versions of VisualBasic, you will be able to create your first ActiveX control key in 10 minutes.
The following steps will guide you through the process of creating a control key that is usually c
. simplecursoradapter is a convenient adapter class specifically implemented for the cursor object. The following describes the input parameters of its constructor:
Public simplecursoradapter (context contex, int layout, cursor C, string [] From, int [])
ContextThe context object of the current program.
LayoutIs used to describe how to display the r class reference of the layout file on the adapter control.
From, A string array consisting of the column names to be displayed.
To, Which is an
The spinner is equivalent to the drop-down list box in HTML. In the following example, we will learn how to use the spinner.
Attribute:
Attribute name
Description
Android: Prompt
This prompt is displayed in the drop-down list dialog box. (Translator's note: The title of the dialog box:
Method:
Public charsequence getprompt ()
Return Value
Prompt displayed when the dialog box
In the previous article, we introduced how to obtain data from provinces, cities, and cities. Now we will introduce an example of how to use the spinner control to implement Level 3 linkage between provinces, cities, and cities.
The following code is implemented during project development.
First, we will show the three slaves in the layout file.
Android: layout_width = "fill_parent"Android: Id = "@ + ID/linearlayoutarea" Android: Orientation = "horizo
Use of the Android:spinner (drop-down box) controlCreate a paging file (Main.xml)1 2 android:id= "@+id/spinner1"3 android:layout_width= "Match_parent"4 android:layout_height= "Wrap_content"/>56 7 android:id= "@+id/tvresult"8 android:layout_width= "Match_parent"9 android:layout_height= "Wrap_content"Ten android:text= "Fruit of choice"/>Create a data source for a drop-down box1 list2 List.add ("Apple");5 List.add ("banana");7 List.add ("Orange");9 List.add ("banana");Create adapter (the data sourc
I. Spinner (drop-down list ):
Encoding implementation: first define the Spinner component in the layout file, connect the optional content through ArrayApadter and the drop-down list, and finally obtain the user selection option, you need to design the event listening setOnItemSelectedListener and implement onItemSelected to obtain the content selected by the user.
The ArrayAdapter adapter is used to connec
Example
The spinner is the drop-down menu, which is equivalent to the swing combo box and HTML
AndroidProvided SpinnerThe drop-down menu of widgets is very easy to use and the style is also applicable. However, the focus of this example is to customize the style in the drop-down menu. The key is to callThe setdropdownviewresource method defines the display style of the drop-down menu in XML format. In addition to the custom drop-down menu, this examp
Android drop-down box, and android drop-down box
What is a spinner? A drop-down menu is actually a pop-up window, but it can be further operated. Click the triangle symbol to bring up a window, usually a list, and then perform operations.
Its definition in the xml file is no different from that in other controls,
1
However, in addition, there are other steps for the definition of the spinner, in the strin
In the previous article to introduce the Android QQ login interface encountered problems and solutions, this article continues to introduce you to the Android QQ interface knowledge.
First to show you the effect of the picture:
Problem:
1. Drop down list (because you haven't seen this yet ...) )
2, the title bar display problems
3, the button to Enable settings
Here's the code:
Layout Fragment_main (Issue 1)
Background before and after EditText,
Scenario
How can we achieve "ajaxstart" in a specific request?
First, the price for rewriting Ajax methods is too high, and jquery's own Ajax events can still be used.
Global events triggered by Ajax are transmitted to all DOM nodes like a standard event. Level: jquery events> Ajax events> Custom Ajax events.Implementation
Wo = Window. wo | {}; wo. ajax = {spinner: $ ([]), init: function () {var $ spinner =
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