Programming Examples

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Tag Archive for ‘add method’

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ASP 4.0 – Table Control – Lab #010

Step 1 - Add Table Control and Place Cells in Design Time

We know html provides Table tag to form the row and column of data. The table is also used to layout the html elements in a formatted way. Asp 4.0 provides a control called Table and using this we can create tables without using the Tr and Td tags. The Table Control contains one or more TableRow Control and a TableRow Control can have one or more TableCell Controls. ASP.Net derived all these controls from the WebControl class. In this lab, we will create a Table Control and generate row and columns of data. Note, ASP.Net do not remember the content of table control between web requests. The data should be persisted, or one should use sessions. We will learn about session and DB in the later Lab

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BoxLayout – Vertical & Horizontal

Java Swing BoxLayout Example

In our example, we have a JFrame window. A FlowLayout Manager takes care of laying out the controls. We have three JPanels. JFrame’s FlowLayout Manager packs the JPanels and in our above screenshot, we have ample space to layout all three JPanels in a single row. First JPanel on the left and third JPanel on the Right, both are taken over by two BoxLayout managers. Both these panel pack the controls vertically. The Layout in the middle packs two JTextArea controls and this panel packs the TextArea horizontally. Note, there is JSeparator which divides both these JTextArea, and the separator run vertical.

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AWT MULTI-SELECT LIST Control

Java AWT Multi-Select List Example

Here is the screenshot of the sample AWT window, which we will create in this example:

In our example, we have a Multi-Select List box control in the upper left portion of the AWT Frame. When the user clicks the Get Fruits button, the AWT TextArea control will show all the selected list items in it. The Clear Output button will delete the text displayed in the AWT TextArea Control. This example will help you learn how to add strings on AWT List Control and how to retrieve all the items selected by the user. Now, we will proceed with the example.

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Java HashSet Class & Set Interface

Before we learn about Java hashSet class, we will learn about the Set interface. Because the HashSet class implements Java Collection’s Set interface. The Set Interface ensures the implementing class to hold uniqueness in the collection. Means, it does not allow duplicate items. In Java Collection framework, the below classes implement the Set interface:

1. HashSet
2. EnumSet
3. TreeSet

There were other classes as well. But here we listed frequently used ones. In this example, we will explore about the HashSet collection class.

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