There are several ways to approach this problem using Python:

1. Using Regular Expressions:

One way to count the number of methods in a .java file is to use regular expressions. We can look for the occurrence of the keywords "public" and "void" followed by the method name to identify the methods in the file. Here's some sample code to achieve this:

import re

Open the .java file

with open('file.java', 'r') as f: content = f.read()

Define the regular expression pattern to match method signatures

pattern = r'public\s+void\s+(\w+)\s*('

Use re.findall to find all occurrences of the pattern in the file content

method_names = re.findall(pattern, content)

Print the number of methods found

print(len(method_names))

1. Using a Java Parser:

Another approach is to use a Java parser library like javalang to parse the .java file and extract the method names. Here's some sample code to achieve this:

import javalang

Open the .java file

with open('file.java', 'r') as f: content = f.read()

Parse the file contents using javalang.parser.parse()

tree = javalang.parse.parse(content)

Use tree.methods to get a list of all methods in the file

methods = tree.methods

Print the number of methods found

print(len(methods))