8——java中关于接口的练习

/*
 * （1）封装一类接口ComputerWeight，
 * 该接口中有3个功能：double computrWeight，
 * void printName，double printPrice。
*/

package li;

public interface ComputerWeight {
	
	double computerWeight();
	
	void printName();
	
	double printPrice();

}
/*
 * （2）封装一类接口ComputerCompany，
 * 该接口有2个功能：String computerName，void printFunction。
*/

package li;

public interface ComputerCompany {
	
	String computerName();
	void printFunction();

}
/*（3）封装一类对象FlashMemory实现上述两类接口。*/

package li;

public class FlashMemory implements ComputerWeight,ComputerCompany 
{
    public double computerWeight()
    {
    	double weigh = 2.2;
    	return weigh;
    }
	
	public void printName()
	{
		System.out.println ("lenovo");
	}
	
	public double printPrice()
	{
		double price  = 5899;
		return price;
	}

	public String computerName() 
	{
		String s = "lenovo";
		return s;
	}

	public void printFunction()
	{
		System.out.println("请注意保护好您的电脑！");
	}

}
/*（4）用一个程序执行入口Test测试上述对象。*/


package li;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
        FlashMemory fm = new FlashMemory();
        double weight,price;
        String name;
        weight = fm.computerWeight();
        price = fm.printPrice();
        name = fm.computerName();
        System.out.println("该品牌电脑的名字为: "+name);
        System.out.println(name+"的重量为： "+weight+"kg.");
        System.out.println(name+"的价格为： "+price+"RMB.");
        fm.printFunction();
	}

}