提高代码复用性

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提高代码复用性
package car;

public class Car {
	String color;
	int number;
	
	void run(){
		System.out.println(color+"::"+number);
	}
}

class carDemo
{
	public static void main(String[] args)
	{
		Car c = new Car();
	
		show(c);
	}
	/*
	 * 封装功能
	 * Car c = new Car();
	 * Car c1 = new Car();
	 * */
	public static void show(Car cc)
	{
		cc.color = "red";
		cc.number = 4;
		cc.run();
		
	}
}