jiekou.java

实现文件的由大变小

interface dis
{
	void display();
}
class tongzhi implements dis
{
	public void display()
	{
		System.out.println("Attention Please!");
	}
}
class qiche implements dis
{
	public void display()
	{
		System.out.println("Low Power!");
	}
}
class guanggao implements dis
{
	public void display()
	{
		System.out.println("Welcome to China!");
	}
}
public class jiekou
{
	public static void main(String args[])
	{
		tongzhi a=new tongzhi();
		guanggao b=new guanggao();
		qiche c=new qiche();
		a.display();
		b.display();
		c.display();
	}
	
}