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Bouncing Ball and Mouse MovementYHL 1
ECE 462 C++ and Java
Lab Exercise 2
Bouncing Ball 
Tracking Mouse Movement
Yung-Hsiang Lu
yunglu@purdue.edu
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Create Graphical User Interface
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add three labels 
and one slider
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add a Panel and set
the background to white
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move NewJFrame to
javaApplication3
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Show CVS Changes
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Add a Class
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Goal: a Paddle and a Ball
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Override paintComponent
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Make Sure You Commit
the Changes to CVS
We have made significant changes. 
They are sufficient to make a new version.
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Constructor of BallPanel
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Update Status
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Handle Mouse Movement
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Submission: A zip file of 
the CVS repository
Remember to commit all changes first.
Submit this exercise only. 
Do not submit any other exercise. 
Do not submit a wrong zip file.
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From LE 01-02 to PA 01
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Programming Assignment 1
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Lab Exercises 1,2 ⇒ PA 1
• draw bricks and track whether a brick has been hit
• collision detection ball - wall, ball - brick, ball - paddle. 
Remember the paddles are curves.
• update the scores
• update the number of balls (lose one when the ball hits 
the left or the right wall)
• determine the winner when the game finishes (no more 
ball left or all bricks disappear)