如何根据传递给它的值来更改行为或函数

function greet(name) {
  console.log("Hello, " + name + "!");
}

greet("Alice");  // 输出：Hello, Alice!
greet("Bob");    // 输出：Hello, Bob!

class Car:
  def __init__(self, color):
    self.color = color

  def drive(self):
    if self.color == "red":
      print("You are driving a red car.")
    else:
      print("You are driving a car.")

my_car = Car("red")
my_car.drive()    # 输出：You are driving a red car.

your_car = Car("blue")
your_car.drive()  # 输出：You are driving a car.

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

public class ConfigExample {
  public static void main(String[] args) {
    try (FileInputStream configInput = new FileInputStream("config.properties")) {
      Properties properties = new Properties();
      properties.load(configInput);

      String environment = properties.getProperty("environment");
      System.out.println("Current environment: " + environment);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}