Using the classes from Lab 1, app and student, create a solution for implementing some kind of random behavior for your student. Suppose the student can be reading, surfing the web, or interacting with other students. You will need to check now and then to see what the student is doing. You will be asking the instance of the student class and what it is doing at certain time intervals.
You Will Need To:
Create a method in the class student that returns what the student is doing.
Have this method generate the behavior randomly. It can’t return the same thing every time.
Implement a for loop in the application to call for the student behavior 20 times. In a 20 minute period, you are going to check once a minute = 20 times. Give a total count for each activity.
Calculate and display the percentage, of the twenty behaviors displayed, spent on each activity.
No need to work with TIME functions in Java. We are making a simulation as if every count of the for loop is one minute.
Generate a report in the end summarizing what the student did in class.
Example:
John is reading
John is reading
…..
John is interacting with peers
John is surfing
---------------------------------------
Suggestions If you need some help, see below for some suggestions:
My suggestion below is a step-by-step solution. Try to implement each step, one at a time.
1. Start with one of the examples from lesson 01. The new method whatsUp() is one more method in the student class. The student class should still have everything as before (first name, etc, getName() methods, same constructor).
2. Create a method called whatsUp( ) in the student class. This method is going to return what the student is doing in class. At first, make it return always the same thing, a string for instance, “surfing the web." Later, I will suggest how to return different things.
3. Change the app. Include a for loopsuch as:
for (int j = 0; j < 20; j++)
{
// here, display what the student is doing using the whatsUp( ) method
// You should know how to do create an instance of a student,
// and display some basic information
// You will use something like st1.whatsUp() in your statement
}
4. If you made it here and read my example with random numbers above, try to change the whatsUp method so that it returns different behaviors randomly.
5. Use integer variables to count the number of times each activity occurs.
6.Use float variables to calculate the percentage.
i have app.jave and student class.
class student
{
String firstName;
String lastName;
int age;
student (String informedFirstName, String
informedLastName, int informedAge)
{
firstName =
informedFirstName;
lastName = informedLastName;
age = informedAge;
}
String getName()
{
return firstName +" " +
lastName;
}
}
public class app
{
public static void main(String args[])
{
student st1 = new student("John", "Smith",
20);
System.out.println(st1.firstName);
}
}
Homework Answers
package A1Q3;
import java.util.Random;
class student
{
String firstName;
String lastName;
int age;
student (String informedFirstName, String informedLastName, int informedAge)
{
firstName = informedFirstName;
lastName = informedLastName;
age = informedAge;
}
String getName()
{
return firstName +" " + lastName;
}
public void whatsUp(){
String arr[] = {"reading","interacting with peers","surfing"};
Random r = new Random();
int n = r.nextInt(3);
int count[] = new int[3];
for(int i=0;i<20;++i){
count[n]++;
System.out.println(firstName +" is " + arr[n]);
n = r.nextInt(3);
}
System.out.println(firstName +" was " + arr[0] + " "+count[0]*100.0/20 + " % of the time");
System.out.println(firstName +" was " + arr[1] + " "+count[1]*100.0/20 + " % of the time");
System.out.println(firstName +" was " + arr[2] + " "+count[2]*100.0/20 + " % of the time");
}
}
===================================================
public class app
{
public static void main(String args[])
{
student st1 = new student("John", "Smith", 20);
System.out.println(st1.firstName);
st1.whatsUp();
}
}
============================================
//Random import that will give us the random numbers
import java.util.Random;
class student
{
String firstName;
String lastName;
int age;
student (String informedFirstName, String informedLastName, int informedAge)
{
firstName = informedFirstName;
lastName = informedLastName;
age = informedAge;
}
String getName()
{
return firstName +" " + lastName;
}
//whatsUp method
public void whatsUp(){
//String array that will tell us what a
student can do
String arr[] = {"reading","interacting with
peers","surfing"};
//Random declaration
Random r = new Random();
//Give us the next random 0,1 and 2
int n = r.nextInt(3);
//Count will keep track of which random number was
chosen
int count[] = new int[3];
//Loop 20 times
for(int i=0;i<20;++i){
// if n chosen was 0 then count[0] = 1 , like wise we
keep track of how many times reading, surfing was
chosen
count[n]++;
//Based on the chosen number n, appropriate String is
printed , like if random number is 0 then arr[0] i.e
reading
System.out.println(firstName +" is " + arr[n]);
//Get the next random number either 0,1 or 2
n = r.nextInt(3);
}
//All done, now since we were keeping track of how many
times we chosen reading, surfing etc. We calculate
percentage
//Percentage of reading is (count[0]/20 )* 100, because
count[0] is for reading
System.out.println(firstName +" was " + arr[0] + "
"+count[0]*100.0/20 + " % of the time");
System.out.println(firstName +" was " + arr[1] + " "+count[1]*100.0/20 + " % of the time");
System.out.println(firstName +" was " + arr[2] + " "+count[2]*100.0/20 + " % of the time");
}
}
===================================================
public class app
{
public static void main(String args[])
{
student st1 = new student("John", "Smith", 20);
System.out.println(st1.firstName);
st1.whatsUp();
}
}
==========
See and let me know if its simple now. It doesnt deserve a negative
rating. ANSWER IS Absolutely correct.
Edit: As per
comments--------------------------------------------------------------------------
import java.util.Random;
class student {
String firstName;
String lastName;
int age;
static String arr[] = { "taking quiz", "reading",
"coding Java" };
student(String informedFirstName, String
informedLastName, int informedAge) {
firstName =
informedFirstName;
lastName = informedLastName;
age = informedAge;
}
String getName() {
return firstName + " " +
lastName;
}
public String whatsUp() {
Random r = new Random();
int n = r.nextInt(3);
return arr[n];
}
}
public class app {
public static void main(String args[]) {
student st1 = new student("Zack",
"Smith", 20);
String arr[] = { "taking quiz",
"reading", "coding Java" };
int count[] = new int[3];
for (int i = 0; i < 20; ++i)
{
String str =
st1.whatsUp();
System.out.println((i+1) + " - " + st1.firstName + " is " +
str);
if(str.equals(arr[0]))
count[0]++;
else
if(str.equals(arr[1]))
count[1]++;
else
count[2]++;
}
System.out.println(st1.firstName +
" was " + arr[0] + " " + count[0] * 100.0 / 20 + " % of the
time");
System.out.println(st1.firstName +
" was " + arr[1] + " " + count[1] * 100.0 / 20 + " % of the
time");
System.out.println(st1.firstName +
" was " + arr[2] + " " + count[2] * 100.0 / 20 + " % of the
time");
}
}
======================================================================
![30 1 public class app t 2 public static void main(String argsI]) Console X <terminated> app [Java Application] /Library/Inter](http://img.homeworklib.com/questions/c3eae970-004a-11ec-a9b1-a1f8513c09b0.png?x-oss-process=image/resize,w_560)
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Based on the graphics you learned this week
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Display his/her basic information
Display for 10 times what he/she is up to (using the method
whatIsUp() that your student class already has)
--------------------------------------------------------------------------------------------------
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public class app
{
public static void main(String args[])
{
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-------------------------------------
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Has a student class
Instance variables for Firstname, last name , and age
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