CSE116   Introduction to Computer Science II    Fall 2000
Lab 2



Labs are to be completed within the week in which it is allocated
and shown to the TA who teaches the lab to you.

Goals:

1. Learn to design and implement graphical user interface (GUI) using 
Java 2 Swing.
2. Study and understand event handling methods (delgation model).
3. Use inner classes.


1. Create a new directory tree cse116/lab/lab2 in your home directory.

2. Copy ~bina/cse116/fall2000/lab/lab2/Calculator.java into your lab2 directory.

3. Calculator.java represents the example given during lecture
class. Study the program. 

4. Compile, execute and observe its operation.

5. The given Calculator application has only add and subtract operations. Add
two more operatio, division and multiplication. Modify the calculator.java class
to include components and handlers to carry out the operations. Let 
the button represented by Division be handled by anonymous class/object and
that of multiplication by a named action handler inner class. compile, debug,
execute and observe operation.

6. Project 1 needs a "combo box" like component. An example for this is 
available at /projects/bina/ddjava2/examples/ch12/fig12_14/ListTest.java
Copy it into your lab2 directory, study the code, compile, execute and
observe operation.

7. A single handler class can handle many action events. See an example
for this in 
/projects/bina/ddjava2/examples/ch12/fig12_07/TextFieldTest.java

Copy this into your directory, study it, compile, execute and observe
operation.

8. How will you clear the fields of the operands and the result in your
caculator? Find out the solution for this task by looking at java API
on line documentation.
"browse" /util/lang/jdk1.2/docs/api/index.html
or look at the source for many of these components in
/util/lang/jdk1.2/src/javax/swing
You may also want to look at the example in 
/projects/bina/ddjava2/examples/ch12  directory.

Show your completed lab to your TA.
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