input: 
  def port_java_to_python(java_code: str) -> str:
      """ Port a Java code snippet to Python 3.
      >>> port_java_to_python(\"\"\"public class Foo {
        public int foo( int a, int b ) {
          return a + b;
        }
      }\"\"\")
      'def foo(a, b):\\n return a + b'
      """
      # This function would translate Java code to Python 3
      # by parsing and transforming the input Java code.
  
output:     
      import re
  
      # Remove Java class declaration
      java_code = re.sub(r'public\s+class\s+\w+\s*\{', '', java_code)
      # Remove closing brace
      java_code = re.sub(r'\s*\}\s*$', '', java_code)
      # Replace public with def
      java_code = re.sub(r'public\s+(\w+)\s+(\w+)\s*\(', r'def \2(', java_code)
      # Replace int with return type
      java_code = re.sub(r'int\s+(\w+)\s*\(', r'\1(', java_code)
      # Remove semicolons
      java_code = re.sub(r';', '', java_code)
      # Remove Java-specific keywords
      java_code = re.sub(r'public|private|protected|static|final|void', '', java_code)
      # Remove extra spaces
      java_code = re.sub(r'\s+', ' ', java_code)
      # Replace return type with Python return statement
      java_code = re.sub(r'return\s+(\w+)\s*;', r'return \1', java_code)
      # Remove extra spaces again
      java_code = re.sub(r'\s+', ' ', java_code)
      # Trim leading and trailing spaces
      java_code = java_code.strip()
  
      return java_code
  