To display a scrolling message in a panel Program plan: In the file “ ScrollingComponent.java ”, import necessary packages, and create a class “ ScrollingComponent”, Declare the variables. Define the constructor to create a scrolling message at position x, y. Define the method “paintComponent()” to paint the component. Define the method “advancePosition()” to advance the message one step in the current direction. Define the method “changeDirection()” to change direction of scrolling message. Define the method “setMessage()” to change the message. In the file “ ScrollingFrame.java ”, import necessary package, and create a class “ ScrollingFrame”, Declare an object for “ScrollingComponent”. Initialize the variables. Define the constructor to create necessary panels and create all necessary components. Create Listener class for update scrolling. Create Listener class for changing direction. Create Listener class to increase speed. Create Listener class to slower speed. Create Listener class to update foreground. Create Listener class to update background. Create Listener class to update message box. Create Listener class to change font's name. Create Listener class to change font's style. Create Listener class to change font's size. In the file “ Scrolling.java ”, import necessary packages, and create a class “ Scrolling”, Define a method “main()”, Create an object of “JFrame”. Set the frame’s title. Set the operation on the frame. Make the frame visible.

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Chapter 11, Problem 5PP

Program Plan Intro

To display a scrolling message in a panel

Program plan:

In the file “ScrollingComponent.java”, import necessary packages, and create a class “ScrollingComponent”,

Declare the variables.

Define the constructor to create a scrolling message at position x, y.

Define the method “paintComponent()” to paint the component.

Define the method “advancePosition()” to advance the message one step in the current direction.

Define the method “changeDirection()” to change direction of scrolling message.

Define the method “setMessage()” to change the message.

In the file “ScrollingFrame.java”, import necessary package, and create a class “ScrollingFrame”,

Declare an object for “ScrollingComponent”.

Initialize the variables.

Define the constructor to create necessary panels and create all necessary components.

Create Listener class for update scrolling.

Create Listener class for changing direction.

Create Listener class to increase speed.

Create Listener class to slower speed.

Create Listener class to update foreground.

Create Listener class to update background.

Create Listener class to update message box.

Create Listener class to change font's name.

Create Listener class to change font's style.

Create Listener class to change font's size.

In the file “Scrolling.java”, import necessary packages, and create a class “Scrolling”,

Define a method “main()”,

Create an object of “JFrame”.

Set the frame’s title.

Set the operation on the frame.

Make the frame visible.

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