Java的ANTLR4。如何在词法分析中显示错误

import org.antlr.v4.runtime.*;

public class MyLexer extends YourLexerBaseListener {
    @Override
    public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol,
                            int line, int charPositionInLine, String msg,
                            RecognitionException e) {
        System.err.println("词法分析错误：line " + line + ":" + charPositionInLine + " " + msg);
    }

    public static void main(String[] args) throws Exception {
        // 创建一个ANTLR4词法分析器
        YourLexer lexer = new YourLexer(CharStreams.fromString("your input"));

        // 注册错误处理监听器
        lexer.removeErrorListeners(); // 移除默认的错误处理监听器
        lexer.addErrorListener(new DiagnosticErrorListener());

        // 进行词法分析
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        tokens.fill();

        // 输出词法单元信息
        tokens.getTokens().forEach(System.out::println);
    }
}