Your first Java lab

northcarolinawrySoftware and s/w Development

Nov 3, 2013 (3 years and 11 months ago)

80 views

Your second

Java lab

(10 bonus points for this lab)

Read all of these instructions
before

beginning the exercises.

1. Make sure you have a browser running in one of your desktops. Open your browser, and go to the web page
http://java.sun.com/j2se/1.4.1/docs/api/index.html
. This is a link to documentation for the standard Java classes.

TASK 1

(5 points)

2. Open TextPad, type the following:


import javax.swing.*;

public class SimpleTrig {



public static void main (String [] args) {


// Please insert your code here



}

}

-

Save it as “SimpleTrig
.java” in your c:
\
Document & Setting
\
<your account>


3. Modify this class by inserting codes which:

-

P
rompt the user for a value
of an ang
le (in degrees).
E.g:

Please enter angle (in degree). Please use JOptionPane for this
.

-

Compute sin and cosine of this angle.

-

Print out the results of this angle’s sin and cosine on the screen
.

Hint
. Use Math.cos and Math.sin for computing cosine and
sin, respectively. Please look these two methods over in the
documentation of Math class.


4. Compile your modified code by choosing Tools
-
> Compile Java in Textpad

5. Run your code by choosing Tools
-
> Run Java Application

6. Test

your code with angle =
0, a= 90 (degrees) and a=180 (degree
s
)


TASK 2

(5 points)


7.
Open TextPad, type the following:


import javax.swing.*;

public class SecondsConvert {


public static void main (String [] args) {


// Please insert your code here



}

}


-

Save it
as “SecondsConvert.java” in your c:
\
Document & Setting
\
<your account>

8
. Modify this class by inserting codes which:

-

Prompt the user for a value of seconds. Please use JOptionPane for this task.

-

Converts this value into the equivalent minutes and secon
ds.

For example: the user enters 120 (seconds), the output would be:

120 seconds = 2 minutes and 0 seconds

-

Print out the result on the screen.

9
. Compile your modified code by choosing Tools
-
> Compile Java in Textpad

10
. Run your code by choosing Tools

-
> Run Java Application

11
. Test your code with seconds = 120, seconds= 150 and seconds=0


SUBMISSION

12. Email to:
nguyenh@uww.edu

both SimpleTrig.java and SecondsConvert.java by Sunday 11:59pm at the latest.