New to programming, this is an assignment I am working on. I have hit a wall, and not sure where to go from here. Continue to get the same error Could not find or load main class Program. Any assistance will be greatly appreciated.
Code:
Write a console program that:
Uses a while loop to perform the following steps:
Prompt the user to kbInput two integers: firstNumber and secondNumber where secondNumber is at least 10 greater
than firstNumber, both numbers are positive integers, and secondNumber is less than 1000.
Verify that the user entered acceptable numbers, and if not, provide error feedback and prompt them again.
Output all results to a file in the same directory as the program, placing an appropriate
label between each section of output. Note that your program must be able to run repeatedly overwriting
the file from the previous run.
Output all odd numbers between firstNumber and secondNumber inclusive, one number per line.
Output the sum of all numbers between firstNumber and secondNumber exclusive.
Uses a for loop to perform the following steps:
Continue writing to the same file as before.
Write a label as before.
Output all numbers from secondNumber to firstNumber in a single line with commas separating the numbers.
Write the date and time as the last line in the file in the format yyyy-mm-dd hh:mm:ss.
*/
PHP Code:
import java.util.*;
import java.io.*;
import java.text.SimpleDateFormat;
public class Assignment2 {
public static void main(String[] args) throws IOException {
Scanner kbInput = new Scanner(System.in);
int firstNumber = 0, secondNumber = 0;
boolean valid = false;
while (!valid) {
valid = false;
try {
System.out.print("Enter first number :");
firstNumber = kbInput.nextInt();
if (firstNumber < 0) {
System.out.println("Enter positive number ");
} else if (firstNumber > 989) {
System.out.println("Enter number less than 900");
} else {
valid = true;
}
} catch (Exception e) {
System.out.println("Enter numeric value");
kbInput = new Scanner(System.in);
}
}
valid = false;
while (!valid) {
try {
valid = false;
System.out.print("Enter second number :");
secondNumber = kbInput.nextInt();
if (secondNumber < 0) {
System.out.println("Enter positive number ");
} else if (secondNumber > 1000) {
System.out.println("Enter number less than 1000");
} else if ((secondNumber - firstNumber) < 10) {
System.out.println("Second number should be at least 10 greater than first number");
} else {
valid = true;
}
} catch (Exception e) {
System.out.println("Enter numeric value");
kbInput = new Scanner(System.in);
}
}
FileWriter fileWriter = new FileWriter(new File("Assignment2.txt"));
//Use a for loop to perform the following steps:
//Continue writing to the same file as before.
//Write ad label as before.
//Output all odd numbers between firstNumber and secondNumber inclusive, one number per line.
fileWriter.write("1. All odd numbers between firstNumber and secondNumber inclusive");
fileWriter.write(System.getProperty("line.separator"));
for (int i = firstNumber; i <= secondNumber; i++) {
if (i % 2 != 0) {
fileWriter.write(i + "");
fileWriter.write(System.getProperty("line.separator"));
}
}
//Output the sum of all numbers between firstNumber and secondNumber exclusive.
fileWriter.write("2. The sum of all numbers between firstNumber and secondNumber exclusive");
fileWriter.write(System.getProperty("line.separator"));
int sum = 0;
for (int i = firstNumber + 1; i < secondNumber; i++) {
sum += i;
}
fileWriter.write(sum + "");
fileWriter.write(System.getProperty("line.separator"));
//Output all numbers from secondNumber to firstNumber in a single line with commas separating the numbers.
fileWriter.write("3. All numbers from secondNumber to firstNumber in a single line with commas separating the numbers");
fileWriter.write(System.getProperty("line.separator"));
for (int i = firstNumber; i <= secondNumber; i++) {
fileWriter.write(i + ",");
}
fileWriter.write(System.getProperty("line.separator"));
//Write the date and time as the last line in the file in the format yyy-mm-dd hh:mm:ss.
fileWriter.write("4. The date and time as the last line in the file in the format yyy-mm-dd hh:mm:ss");
fileWriter.write(System.getProperty("line.separator"));
fileWriter.write((new SimpleDateFormat("yyyy-mm-dd hh:mm:ss")).format(new Date()));
System.out.println("File Assignment2.txt written");
fileWriter.close();
}
}
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