Java implementation: Find whether a given file contains a specific string

Require:

       Given a file in the form of strings, each line is a string. I hope to find "abc" in the comment line, and return true if there is any, and false if not. Two comment methods are specified: // and /* */.

Code:

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class test {
    public static boolean check(String path) {
        try {
            FileReader fr = new FileReader(path);// 字符流
            BufferedReader br = new BufferedReader(fr);// 缓冲流

            StringBuffer sb = new StringBuffer();
            String line;
            
            while ((line = br.readLine()) != null) {
                sb.append(line).append("\n");
            }

            String content = sb.toString();

            // 单行
            if (content.contains("//") && content.contains("abc")) {
                return true;
            }

            // 多行
            if (content.contains("/*") && content.contains("abc") && content.contains("*/")) {
                int start = content.indexOf("/*");
                int end = content.indexOf("*/");
                
                String innerContent = "";
                if (start <= end) {// */ /*  abc
                    innerContent = content.substring(start, end);
                }

                if (innerContent.contains("abc")) {
                    return true;
                }
            }
            br.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return false;
    }

    public static void main(String[] args) {
        String path = "文件绝对路径";
        boolean res = check(path);
        System.out.println("result:" + res);
    }
}

Thumbs up if it’s useful, thank you giegie!

：）