Find Method Sign Line Number

 package java9;

 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.List;
 import java.util.regex.Pattern;

 public class TTT {

     public static void main(String args[]) throws IOException {

         List<String> readAllLines = Files.readAllLines(Paths
                 .get("/Users/hongtaowang/git/spring-boot-jpa-demo/src/main/java/com/my/app/web/IndexController.java"));

         int issueLine = 29;

         String preMethodSignNumber = getPreMethodSignNumber(issueLine, readAllLines);

         System.out.println(preMethodSignNumber);

         String preSignEndChar = getPreSignEndChar(readAllLines, issueLine);

         System.out.println(preSignEndChar);

     }

     private static String getPreSignEndChar(List<String> readAllLines, int issueLine) {
         int nextMethodSignLine = getNextMethodSignNumber(issueLine, readAllLines);

         for (int endLineNumber = nextMethodSignLine - 1; endLineNumber > 0; endLineNumber--) {
             String endChar = readAllLines.get(endLineNumber - 1);

             if (endChar.contains("}")) {
                 return (endLineNumber) + " end     line " + endChar;
             }

         }

         return "";
     }

     private static int getNextMethodSignNumber(int i, List<String> readAllLines) {
         int j = i;
         for (; j < readAllLines.size(); j++) {
             String p = readAllLines.get(j - 1);
             boolean extracted = matchMethodSign(p);
             if (extracted) {
                 break;
             }

         }
         return j;
     }

     private static String getPreMethodSignNumber(int currentLine, List<String> readAllLines) {
         for (int preLine = currentLine - 1; preLine > 0; preLine--) {
             String preLineSource = readAllLines.get(preLine - 1);

             if (matchMethodSign(preLineSource)) {
                 return (preLine) + " end     line " + preLineSource;
             }

         }

         return "";
     }

     private static boolean matchMethodSign(String d) {
         String pattern = ".*[A-z].* .*[A-z1-9]\\(.*";
         boolean isMatch = Pattern.matches(pattern, d);
         if (!isMatch) {
             return false;
         }

         if (d.contains("return")) {
             return false;
         }

         if (d.contains("=")) {
             return false;
         }

         return true;
     }

 }