Error: Could not find or load main class IndentChecker.IndentChecker Caused by: java.lang.ClassNotFoundException: IndentChecker.IndentChecker

Question

I have the files in the src folder. I have another project that is also giving me the same error of not being able to find the file. I have basically been slamming my head against my desk trying to figure out what is wrong.

package IndentChecker;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.Stack;

    class BadIndentationException extends RuntimeException {
        BadIndentationException(String error) {

            super(error);
        }
    }

    public class IndentChecker {
        Stack<Integer> indentStack = new Stack<Integer>();

        private int findFirstNonBlank(String line) {
            // return index of first non-blank character
            // return -1 if the line doesn't contain a non-blank character
            for (int i= 0; i < line.length(); i++) {
                if(line.charAt(i) != ' '){
                    return i;
                }
            }
            return -1;
        }

        private void processLine(String line, int lineNumber) {
            int index = findFirstNonBlank(line);
            // Skip blank lines ... i.e. return immediately
            if(index == -1)
                return;
            // If the stack is empty, then push this index onto the stack and return
            if(indentStack.isEmpty())
                indentStack.push(index);
                // If this index > than the top of the stack, then push this index onto the stack and return
            else {
                if(index > indentStack.peek()){
                    indentStack.push(index);
                    return;
                }
                while(indentStack.peek() > index){ // Pop off all Indentation indexes > index
                    indentStack.pop();
                    // At his point the top of the stack should match the current index. If it
                    // doesn't throw a BadIndentationException. In the error message, include the source Line Number
                } if(indentStack.peek() != index)
                    throw new BadIndentationException("error at line: " + lineNumber);
            }
        }

        public void checkIndentation(String fileName) {
            indentStack.clear(); // Clear the stack
            Scanner input = null;
            try {
                input = new Scanner(new File(fileName));
                int lineNumber = 1;
                while (input.hasNextLine()) { // read through the file line by line
                    String line = input.nextLine();
                    System.out.println(lineNumber + ":" + line);
                    processLine(line, lineNumber); // for each line, call processLine to check indentation
                    lineNumber += 1;
                }
                if (indentStack.peek() == 0)
                    System.out.println("***" + fileName + " must be properly indented." + "/n");
            } catch (BadIndentationException error) {
                System.out.println(error);
            } catch (FileNotFoundException e) {
                System.out.println("Can't open file:" + fileName);
            } finally {
                if (input != null)
                    input.close();
            }
        }

        public static void main(String[] args) {
            IndentChecker indentChecker = new IndentChecker();
            for (int i = 0; i < args.length; i++) {
                System.out.println("Processing file: " + args[i]);
                indentChecker.checkIndentation(args[i]);
            }
        }
}

When I run the code I get this message " C:\Users\user.jdks\openjdk-19.0.2\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2022.3.3\lib\idea_rt.jar=54873:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2022.3.3\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 IndentChecker.IndentChecker Error: Could not find or load main class IndentChecker.IndentChecker Caused by: java.lang.ClassNotFoundException: IndentChecker.IndentChecker

Process finished with exit code 1 " tried to replace "dictionary.txt" with absolute and src path. Tried to run File f= new File and system out that, and it still cannot find the file.