Java Graphics Basics

Required reading

The purpose of this lab is to learn about Java graphics. You should be familiar with the Java graphics methods prior to your lab session. The following items are good references for the material presented in Lab 11:

• Chapter 5 in Great Ideas in Computer Science with Java, pages 191-199.

• The Gdemo applets:

  GDemo:	Java code	Applet
  GDemo2:	Java code	Applet
  GDemo3:	Java code	Applet

  The graphics code to create the drawings is found in the actionPerformed subroutine. Look over the actual Java code. You should understand the connection between the Java methods used in the code and what is drawn in the applet.

• The Java Graphics API

You may want to bring the Great Ideas book with you to lab.

Exercise

• Consider the following portion of Java code:

  drawLine(25, 25, 75, 75);
  drawLine(25, 75, 75, 25);
  drawRect(25, 25, 50, 50);
  

  Draw the resulting graphics on the Canvas below. 0 25 50 75 100 0 ----------------------------------------------- X | | | | | | | | 25 | | | | | | | | | | 50 | | | | | | | | | | 75 | | | | | | | | | | 100 -------------------------------------------- | | Y

Methods Practice

For this prelab assignment, you should write solutions to SquareLength and One-heap Nim and bring them with you to lab.