Java's Basic User Interface Components - The Choice List Class

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Choice Lists, which is created from the Choice class, are components that enable a single item to be picked from a pull-down list. We encounter this control very often on the web when filling out forms. The first step in creating a Choice List is to create a choice object to hold the list, as shown below:

Choice cgender = new Choice();

Items are added to the Choice List by using addItem(String) method on the object. The following code adds two items to the gender choice list.

cgender.addItem(“Female”); cgender.addItem(“Male”);

After you add the Choice List it is added to the container like any other component using the add() method. The following example shows an Applet that contains a list of shopping items in the store.

/*
<Applet code= “ChoiceTest.class”
Width = 200
Height = 150>
</applet>
*/

Import java.awt.*;

Public class ChoiceTest extends java.applet.Applet
{
Choice shoplist = new Choice();

Public void init(){
shoplist.addItem(“Bed And Bath”);
shoplist.addItem(“Furniture”);
shoplist.addItem(“Clothing”);
shoplist.addItem(“Home Appliance”);
shoplist.addItem(“Toys and Accessories”);

add(shoplist);
}
}


The choice list class has several methods, which are given below:

Method	Action
getItem()	Returns the string item at the given position (items inside a choice begin at 0, just like arrays)
countItems()	Returns the number of items in the menu
getSelectedIndex()	Returns the index position of the item that's selected
getSelectedItem()	Returns the currently selected item as a string
select(int)	Selects the item at the given position
select(String)	Selects the item with the given string

Next: The TextField and TextArea Class >>
 

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