function checkJavaSyntax(code) {
    let errors = [];
    let lines = code.split("\n");
    let openBraces = 0;

    if (!code.match(/public\s+class\s+\w+\s*\{/)) {
        errors.push("Error: Missing or incorrect class definition.");
    }

    if (!code.match(/public\s+static\s+void\s+main\s*\(String\[\]\s+args\)\s*\{/)) {
        errors.push("Error: Missing or incorrect main method.");
    }

    let keywords = ["if", "else", "while", "for", "return", "int", "char", "float", "double", "void", "public", "static", "class"];

    for (let i = 0; i < lines.length; i++) {
        let line = lines[i].trim();
        if (!line) continue;

        if (line.includes("{")) openBraces++;
        if (line.includes("}")) openBraces--;

        let words = line.split(/\s+/);
        for (let word of words) {
            if (keywords.includes(word)) continue;
            if (word.match(/^(if|else|while|for|return|public|static|class)$/i)) {
                errors.push(`Error on line ${i + 1}: Misspelled keyword '${word}'. Did you mean '${word.toLowerCase()}'?`);
            }
        }

        if (line.includes("x-;")) {
            errors.push(`Error on line ${i + 1}: Incorrect operator 'x-;'. Did you mean 'x--;'?`);
        }

        if (!line.endsWith(";") && !line.includes("{") && !line.includes("}")) {
            errors.push(`Error on line ${i + 1}: Missing semicolon.`);
        }

        if (line.includes("System.out.println") && !line.match(/System\.out\.println\(["'].*["']\)\s*;/)) {
            errors.push(`Error on line ${i + 1}: Incorrect System.out.println syntax.`);
        }

        if (line.includes("System.out.pritln")) {
            errors.push(`Error on line ${i + 1}: Misspelled 'System.out.println'. Did you mean 'System.out.println'?`);
        }

        if (line.includes('System.out.println("Done)')) {
            errors.push(`Error on line ${i + 1}: Missing closing quote in System.out.println.`);
        }
    }

    if (openBraces !== 0) {
        errors.push("Error: Mismatched braces `{}`.");
    }

    return errors.length ? errors : ["Syntax is correct!"];
}