I need help with this Java program. I got some minor error that I couldn't fix.

Checker Classes

You will have to implement specific checks to highlight errors found in the source files. We provided an interface Check.java that defines a single method public Optional<Error> lint(String line, int lineNumber) . All the checkers you write should implement this interface and hence, you need to implement the lint method.

All of these should return an an Error when one is present with a custom message of your choosing to describe what the error means to the user. If the condition a Check is looking for is not present for a line, should return Optional.empty().

Other Classes

For each file below, implement the methods and constructors defined.

Error.java

public Error(int code, int lineNumber, String message)

Constructs an Error given the error code, line number and a message.

public String toString()

Returns a String representation of the error with the line number, error code and message. The representation should be formatted as (replace curly braces with the actual values)

public int getLineNumber()

Returns the line number of this error

public int getCode()

Returns the error code of this error

public String getMessage()

Returns the message for this error

Linter.java

public Linter(List<Check> checks)

Constructs a Linter given a list of checks to run through.

public List<Error> lint(String fileName) throws FileNotFoundException

Lints the given files line-by-line by running through all the checks passed into the constructor. You should first open the file (specified by fileName) and read through the file line-by-line. You can use the File and Scanner classes to help open and read the file line-by-line. For each line, run through all the checks and add errors if they are present. Returns a list of all errors found.

All of these should return an an Error when one is present with a custom message of your choosing to describe what the error means to the user. If the condition a Check is looking for is not present for a line, should return Optional.empty().

Here's a class I need help with

BreakCheck class

import java.util.*;

public class BreakCheck implements Check {
    public Optional<Error> lint(String line, int lineNumber) {
        // Match "break" outside of comments or strings
        if (line.matches("^(?!\\s*//|\\s*/\\*|\\s*\\*).*\\bbreak\\b.*")) {
            return Optional.of(new Error(2, lineNumber, "Line contains 'break' keyword outside of a comment"));
        }
        return Optional.empty();
    }
}

Error Class:

import java.util.*;

public class BreakCheck implements Check {
    public Optional<Error> lint(String line, int lineNumber) {
        // Match "break" outside of comments or strings
        if (line.matches("^(?!\\s*//|\\s*/\\*|\\s*\\*).*\\bbreak\\b.*")) {
            return Optional.of(new Error(2, lineNumber, "Line contains 'break' keyword outside of a comment"));
        }
        return Optional.empty();
    }
}

TestFile:

import java.util.*;

public class BreakCheck implements Check {
    public Optional<Error> lint(String line, int lineNumber) {
        // Match "break" outside of comments or strings
        if (line.matches("^(?!\\s*//|\\s*/\\*|\\s*\\*).*\\bbreak\\b.*")) {
            return Optional.of(new Error(2, lineNumber, "Line contains 'break' keyword outside of a comment"));
        }
        return Optional.empty();
    }
}

Linter Class

import java.util.*;

public class BreakCheck implements Check {
    public Optional<Error> lint(String line, int lineNumber) {
        // Match "break" outside of comments or strings
        if (line.matches("^(?!\\s*//|\\s*/\\*|\\s*\\*).*\\bbreak\\b.*")) {
            return Optional.of(new Error(2, lineNumber, "Line contains 'break' keyword outside of a comment"));
        }
        return Optional.empty();
    }
}

Check.java

import java.util.*;public interface Check {
    public Optional<Error> lint(String line, int lineNumber);
}

LinterMain :

import java.util.*;

// A common interface for linters that can check a single line of code
// Every Check will check for its own type of error on a single line of code.
public interface Check {
    // Checks for this Check's error condition on this line with this line number.
    // If an error exists on this line, returns an Optional with an Error present 
    // indicating an error occurred. If no errors are present, returns an empty Optional.
    public Optional<Error> lint(String line, int lineNumber);
}

I can't pass this check :
BreakCheck correctly tests for break statements:

Failed: Make sure that breakCheck does not only check if a line starts with a comment for the case when 'break' is in a comment. ==> expected: <true> but was: <false>