Good day

Am running a particular java code and am having issues compiling as i get an erro such as could not find Class and main class. I have created the class and the main class using java Netbeans but i still cant compile it. Am so sure my code is correct but its compiling it thats giving me the issue

Below is the Assignment and code for the solution. Please can someone guide me on how to compile in other not to get the error message

The following class StatCalc defines a series of methods for computing statistics for a group of numbers.

/*

* An object of class StatCalc can be used to compute several simple statistics

* for a set of numbers. Numbers are entered into the dataset using

* the enter(double) method. Methods are provided to return the following

* statistics for the set of numbers that have been entered: The number

* of items, the sum of the items, the average, and the standard deviation

*/

public class StatCalc {



private int count; // Number of numbers that have been entered.

private double sum; // The sum of all the items that have been entered.

private double squareSum; // The sum of the squares of all the items.



/**

* Add a number to the dataset. The statistics will be computed for all

* the numbers that have been added to the dataset using this method.

*/

public void enter(double num) {

count++;

sum += num;

squareSum += num*num;

}



/**

* Return the number of items that have been entered into the dataset.

*/

public int getCount() {

return count;

}



/**

* Return the sum of all the numbers that have been entered.

*/

public double getSum() {

return sum;

}



/**

* Return the average of all the items that have been entered.

* The return value is Double.NaN if no numbers have been entered.

*/

public double getMean() {

return sum / count;

}



/**

* Return the standard deviation of all the items that have been entered.

* The return value is Double.NaN if no numbers have been entered.

*/

public double getStandardDeviation() {

double mean = getMean();

return Math.sqrt( squareSum/count - mean*mean );

}

} // end class StatCalc



Using the StatCalc class, write a program that calculates and then displays as output to the console, the following statistics against the set of numbers given below.

Statistics that must be calculated:

Count – Quantity of numbers in the data set.
Mean – The mean or average of the numbers in the data set.
Standard Deviation – The measure of variance (or dispersion) from the mean.
The set of numbers that you must use is as follows:

5 7 12 23 3 2 8 14 10 5 9 13

You must create a program with a main method that defines the StatCalc class and instantiates an instance of StatCalc called myStatCalc. Your program should instantiate the instance of the StatCalc using a statement similar to the following:

StatCalc myStatCalc;

myStatCalc = new StatCalc();

MY SOLUTION

Class File
/*
An object of class StatCalc can be used to compute several simple statistics
for a set of numbers. Numbers are entered into the dataset using
the enter(double) method. Methods are provided to return the following
statistics for the set of numbers that have been entered: The number
of items, the sum of the items, the average, the standard deviation,
the maximum, and the minimum.
*/

public class StatCalc {

private int count; // Number of numbers that have been entered.
private double sum; // The sum of all the items that have been entered.
private double squareSum; // The sum of the squares of all the items.
private double max = Double.NEGATIVE_INFINITY; // Largest item seen.
private double min = Double.POSITIVE_INFINITY; // Smallest item seen.

public void enter(double num) {
// Add the number to the dataset.
count++;
sum += num;
squareSum += num*num;
if (num > max)
max = num;
if (num < min)
min = num;
}

public int getCount() {
// Return number of items that have been entered.
return count;
}

public double getSum() {
// Return the sum of all the items that have been entered.
return sum;
}

public double getMean() {
// Return average of all the items that have been entered.
// Value is Double.NaN if count == 0.
return sum / count;
}

public double getStandardDeviation() {
// Return standard deviation of all the items that have been entered.
// Value will be Double.NaN if count == 0.
double mean = getMean();
return Math.sqrt( squareSum/count - mean*mean );
}

public double getMin() {
// Return the smallest item that has been entered.
// Value will be infinity if no items have been entered.
return min;
}

public double getMax() {
// Return the largest item that has been entered.
// Value will be -infinity if no items have been entered.
return max;
}

} // end class StatCalc

Main Class

/*
Computes and display several statistics for a set of non-zero
numbers entered by the user. (Input ends when user enters 0.)
This program uses StatCalc.java.0
*/

public class SimpleStats {

public static void main(String[] args) {

StatCalc calc; // Computes stats for numbers entered by user.
calc = new StatCalc();

double item; // One number entered by the user.

TextIO.putln("Enter your numbers. Enter 0 to end.";
TextIO.putln();

do {
TextIO.put("? ";
item = TextIO.getlnDouble();
if (item != 0)
calc.enter(item);
} while ( item != 0 );

TextIO.putln("\nStatistics about your calc:\n";
TextIO.putln(" Count: " + calc.getCount());
TextIO.putln(" Sum: " + calc.getSum());
TextIO.putln(" Minimum: " + calc.getMin());
TextIO.putln(" Maximum: " + calc.getMax());
TextIO.putln(" Average: " + calc.getMean());
TextIO.putln(" Standard Deviation: " + calc.getStandardDeviation());

} // end main()

} // end SimpleStats

Hello, its like you are calling a class you did not import. (TextIO).

Simple download the TextIO.java source file am attaching to this comment, and place it in the same package where your main class is. **for net bean, using you ide, copy and paste the source code in the folder where other source code are located or in the same package where other source file are located**

I just ran the code, and it worked.

Here is where I found the source code.

The TextIO.java class, is not a standard java class which you can just find in java SE API most times, when you get problems like this, urv got to surf the net, to see if your missing files can be found there.

Btw, that's a cool program you've got there.

buster:
Good day

Am running a particular java code and am having issues compiling as i get an erro such as could not find Class and main class. I have created the class and the main class using java Netbeans but i still cant compile it. Am so sure my code is correct but its compiling it thats giving me the issue

Below is the Assignment and code for the solution. Please can someone guide me on how to compile in other not to get the error message

The following class StatCalc defines a series of methods for computing statistics for a group of numbers.

/*

* An object of class StatCalc can be used to compute several simple statistics

* for a set of numbers. Numbers are entered into the dataset using

* the enter(double) method. Methods are provided to return the following

* statistics for the set of numbers that have been entered: The number

* of items, the sum of the items, the average, and the standard deviation

*/

public class StatCalc {



private int count; // Number of numbers that have been entered.

private double sum; // The sum of all the items that have been entered.

private double squareSum; // The sum of the squares of all the items.



/**

* Add a number to the dataset. The statistics will be computed for all

* the numbers that have been added to the dataset using this method.

*/

public void enter(double num) {

count++;

sum += num;

squareSum += num*num;

}



/**

* Return the number of items that have been entered into the dataset.

*/

public int getCount() {

return count;

}



/**

* Return the sum of all the numbers that have been entered.

*/

public double getSum() {

return sum;

}



/**

* Return the average of all the items that have been entered.

* The return value is Double.NaN if no numbers have been entered.

*/

public double getMean() {

return sum / count;

}



/**

* Return the standard deviation of all the items that have been entered.

* The return value is Double.NaN if no numbers have been entered.

*/

public double getStandardDeviation() {

double mean = getMean();

return Math.sqrt( squareSum/count - mean*mean );

}

} // end class StatCalc



Using the StatCalc class, write a program that calculates and then displays as output to the console, the following statistics against the set of numbers given below.

Statistics that must be calculated:

Count – Quantity of numbers in the data set.
Mean – The mean or average of the numbers in the data set.
Standard Deviation – The measure of variance (or dispersion) from the mean.
The set of numbers that you must use is as follows:

5 7 12 23 3 2 8 14 10 5 9 13

You must create a program with a main method that defines the StatCalc class and instantiates an instance of StatCalc called myStatCalc. Your program should instantiate the instance of the StatCalc using a statement similar to the following:

StatCalc myStatCalc;

myStatCalc = new StatCalc();

MY SOLUTION

Class File
/*
An object of class StatCalc can be used to compute several simple statistics
for a set of numbers. Numbers are entered into the dataset using
the enter(double) method. Methods are provided to return the following
statistics for the set of numbers that have been entered: The number
of items, the sum of the items, the average, the standard deviation,
the maximum, and the minimum.
*/

public class StatCalc {

private int count; // Number of numbers that have been entered.
private double sum; // The sum of all the items that have been entered.
private double squareSum; // The sum of the squares of all the items.
private double max = Double.NEGATIVE_INFINITY; // Largest item seen.
private double min = Double.POSITIVE_INFINITY; // Smallest item seen.

public void enter(double num) {
// Add the number to the dataset.
count++;
sum += num;
squareSum += num*num;
if (num > max)
max = num;
if (num < min)
min = num;
}

public int getCount() {
// Return number of items that have been entered.
return count;
}

public double getSum() {
// Return the sum of all the items that have been entered.
return sum;
}

public double getMean() {
// Return average of all the items that have been entered.
// Value is Double.NaN if count == 0.
return sum / count;
}

public double getStandardDeviation() {
// Return standard deviation of all the items that have been entered.
// Value will be Double.NaN if count == 0.
double mean = getMean();
return Math.sqrt( squareSum/count - mean*mean );
}

public double getMin() {
// Return the smallest item that has been entered.
// Value will be infinity if no items have been entered.
return min;
}

public double getMax() {
// Return the largest item that has been entered.
// Value will be -infinity if no items have been entered.
return max;
}

} // end class StatCalc

Main Class

/*
Computes and display several statistics for a set of non-zero
numbers entered by the user. (Input ends when user enters 0.)
This program uses StatCalc.java.0
*/

public class SimpleStats {

public static void main(String[] args) {

StatCalc calc; // Computes stats for numbers entered by user.
calc = new StatCalc();

double item; // One number entered by the user.

TextIO.putln("Enter your numbers. Enter 0 to end.";
TextIO.putln();

do {
TextIO.put("? ";
item = TextIO.getlnDouble();
if (item != 0)
calc.enter(item);
} while ( item != 0 );

TextIO.putln("\nStatistics about your calc:\n";
TextIO.putln(" Count: " + calc.getCount());
TextIO.putln(" Sum: " + calc.getSum());
TextIO.putln(" Minimum: " + calc.getMin());
TextIO.putln(" Maximum: " + calc.getMax());
TextIO.putln(" Average: " + calc.getMean());
TextIO.putln(" Standard Deviation: " + calc.getStandardDeviation());

} // end main()

} // end SimpleStats

I hope it helped

public class StatCalc {
private int count;
private double sum;
private double squareSum;
private double min = Double.POSITIVE_INFINITY;
private double max = Double.NEGATIVE_INFINITY;

public void enter(double num){
count++;
sum += num;
squareSum += num * num;
if (num < min)
min = num;
if (num > max)
max = num;
}

public int getCount(){
return count;
}

public double getSum(){
return sum;
}

public double getMean(){
return sum / count;
}

public double getMin(){
return min;
}

public double getMax(){
return max;
}

public double getStandardDeviation(){
return Math.sqrt(squareSum/count - getMean() * getMean());
}
}

import java.util.Scanner;

public class SimpleStats{
public static void main(String[] args){
Scanner input = new Scanner(System.in);
StatCalc calc = new StatCalc();

double num;
do{
System.out.print("Enter your number and press enter or 0 to end: " );
num = input.nextDouble();
if (num != 0)
calc.enter(num);
} while(num != 0);

System.out.printf("\nStatistics about your calc\n" );
System.out.printf("Count: %d\n", calc.getCount());
System.out.println("Sum: " + calc.getSum());
System.out.println("Minimum: " + calc.getMin());
System.out.println("Maximum: " + calc.getMax());
System.out.println("Average: " + calc.getMean());
System.out.printf("Standard Deviation: %.2f\n", calc.getStandardDeviation());
}
}

i need this too

lawbestt:
i need this too

Yo wanna learn java programming??

Dalexicographer:
Yo wanna learn java programming??

are u good with java?

universe123:
are u good with java?

Im an enthusiast... Yet to be a pro though