Question

I don't know why my java code is not running this error code pops up --> Error: Could not find or load main class DieRoll Caused by: java.lang.ClassNotFoundException: DieRoll.

Code below:

   import java.util.Random;

   import java.util.Scanner;

   public class Assignment {

   public static void combineStrings() {

   String school = "Harvard";

   String city = "Boston, MA";

   int stringLen;

  

   String upper, changeChar, combine;

  

   stringLen = school.length();

   System.out.println(school+" contains "+stringLen+" characters." );

  

   upper = school.toUpperCase();

   System.out.println(upper);

  

   changeChar = upper.replace("A", "*");

   combine = school +" "+city;

   System.out.println("The final string is "+combine );

   }

  

   public static void dieRoll()

   {

   Scanner scanner = new Scanner(System.in);

   Random random = new Random();

   int sides, n1, n2, n3;

  

   System.out.print("How many sides? ");

   sides = scanner.nextInt();

  

  

   n1 = random.nextInt(sides)+1;

   n2 = random.nextInt(sides)+1;

   n3 = random.nextInt(sides)+1;

  

   System.out.println("First Roll\t="+n1);

   System.out.println("Second Roll\t="+n2);

   System.out.println("Third Roll\t="+n3);

   System.out.println("Die Total\t="+(n1+n2+n3));

   System.out.println("Average Roll\t="+((n1+n2+n3)/3.0));

   }

  

  

   public static void candy()

   {

   int numCarton=0,candyBars;

   Scanner scanner = new Scanner(System.in);

  

   System.out.println("Enter the number of candy bars : ");

   candyBars = scanner.nextInt();

   do

   {

   numCarton++;

   candyBars = candyBars-24;

   }while(candyBars > 0);

  

   System.out.println("Number of Cartons needed = "+numCarton);

   }

  

public static void main(String[] args) {

  

   combineStrings();

   dieRoll();

   candy();

   }

}

Answer 1

The code is absolutely fine but your error is Error: Could not find or load main class DieRoll Caused by: java.lang.ClassNotFoundException: DieRoll.

Then follow the below steps:

1.save the java code as Assignment.java then it will work fine.

This because if you won't save as Assignment.java it can't find the main class.

SOURCE CODE:

import java.util.Random;

   import java.util.Scanner;

   public class Assignment {

   public static void combineStrings() {

   String school = "Harvard";

   String city = "Boston, MA";

   int stringLen;

  

   String upper, changeChar, combine;

  

   stringLen = school.length();

   System.out.println(school+" contains "+stringLen+" characters." );

  

   upper = school.toUpperCase();

   System.out.println(upper);

  

   changeChar = upper.replace("A", "*");

   combine = school +" "+city;

   System.out.println("The final string is "+combine );

   }

  

   public static void dieRoll()

   {

   Scanner scanner = new Scanner(System.in);

   Random random = new Random();

   int sides, n1, n2, n3;

  

   System.out.print("How many sides? ");

   sides = scanner.nextInt();

  

  

   n1 = random.nextInt(sides)+1;

   n2 = random.nextInt(sides)+1;

   n3 = random.nextInt(sides)+1;

  

   System.out.println("First Roll\t="+n1);

   System.out.println("Second Roll\t="+n2);

   System.out.println("Third Roll\t="+n3);

   System.out.println("Die Total\t="+(n1+n2+n3));

   System.out.println("Average Roll\t="+((n1+n2+n3)/3.0));

   }

  

  

   public static void candy()

   {

   int numCarton=0,candyBars;

   Scanner scanner = new Scanner(System.in);

  

   System.out.println("Enter the number of candy bars : ");

   candyBars = scanner.nextInt();

   do

   {

   numCarton++;

   candyBars = candyBars-24;

   }while(candyBars > 0);

  

   System.out.println("Number of Cartons needed = "+numCarton);

   }

  

public static void main(String[] args) {

  

   combineStrings();

   dieRoll();

   candy();

   }

}