input: 
  def port_java_code(java_code: str) -> str:
      """Given a Java code snippet, convert it to Python 3 code.
      >>> port_java_code("public class Foo { public int foo(int a, int b) { return a + b; } }")
      "def foo(a, b):\\n return a + b"
      >>> port_java_code("public class Bar { public int bar(int x) { return x * x; } }")
      "def bar(x):\\n return x * x"
      >>> port_java_code("public class Add { public int add(int c, int d) { return c + d; } }")
      "def add(c, d):\\n return c + d"
      """
  
output:     import re
  
      # Remove class definition and method signature
      java_code = re.sub(r'public class \w+ { public \w+ \w+\([^)]*\)\s*{', '', java_code)
      # Remove closing brace
      java_code = re.sub(r'}\s*}$', '', java_code)
      # Convert return statement to Python syntax
      java_code = re.sub(r'return ', 'return ', java_code)
      # Remove trailing semicolon
      java_code = re.sub(r';$', '', java_code)
      # Add Python function definition
      function_name = re.search(r'public \w+ (\w+)\([^)]*\)', java_code).group(1)
      parameters = re.search(r'public \w+ \w+\(([^)]*)\)', java_code).group(1)
      parameters = ', '.join([p.split(' ')[-1] for p in parameters.split(', ')])
      python_code = f"def {function_name}({parameters}):\n return {java_code.strip()}"
  
      return python_code