JavaソースコードのPropertyを獲得する

package org.tei.mvcbinding;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

@SpringBootApplication
public class MvcBindingApplication {

    public static void main(String[] args) throws IOException {
        String originalFilePath = "/Users/XXX/IdeaProjects/mvc-binding/src/main/java/org/XXX/mvcbinding/controller/Admin.java";
        Map<String, MyJavaField> originalMap = getFieldMap(originalFilePath);
        String targetFilePath = "/Users/XXX/IdeaProjects/mvc-binding/src/main/java/org/XXX/mvcbinding/controller/User.java";
        Map<String, MyJavaField> targetMap = getFieldMap(targetFilePath);


        Set<String> originalSet = new HashSet<>(originalMap.keySet());
        Set<String> targetSet = new HashSet<>(targetMap.keySet());
        targetSet.removeAll(originalSet);
        // display result
        for (String key : targetSet) {
            MyJavaField myJavaField = targetMap.get(key);
            System.out.print(myJavaField.getComment());
            System.out.println(myJavaField.getContent());
        }
    }

    private static Map<String, MyJavaField> getFieldMap(String filePath) throws IOException {
        FileInputStream inputStream = new FileInputStream(filePath);
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
        String line;
        boolean readyToParse = false;
        Map<String, MyJavaField> propertyMap = new HashMap<>();
        StringBuilder comment = new StringBuilder();
        while ((line = bufferedReader.readLine()) != null) {
            line = line.trim();
            if (line.isBlank()) {
                continue;
            }
            if (line.contains("}")) {
                break;
            }
            if (readyToParse) {
                if (!line.startsWith("//") && !line.startsWith("/*") && !line.startsWith("*")) {
                    int endIndex = line.indexOf(";");
                    if (endIndex > 0) {
                        int j = 0;
                        for (int i = endIndex; i >= 0; i--) {
                            if (' ' == (line.charAt(i))) {
                                j = i;
                                break;
                            }
                        }
                        String fieldName = line.substring(j, endIndex).trim();
                        MyJavaField field = new MyJavaField(line, comment.toString());
                        comment.delete(0, comment.length());
                        propertyMap.put(fieldName, field);
                    }

                } else {
                    comment.append(line).append("\n");
                }

            }
            if (line.contains("{")) {
                readyToParse = true;
            }
        }
        //todo debug
        // System.out.println("propertyMap => " + propertyMap);
        //close
        inputStream.close();
        bufferedReader.close();
        return propertyMap;
    }

    @Data
    @NoArgsConstructor
    @AllArgsConstructor
    public static class MyJavaField {
        private String content;
        private String comment;

    }
}