teststatic.java

关于隐藏域抽象域的例子

public class TestStatic
{
	public static void main(String args[])
	{
		PhoneCard200 my200_1=new PhoneCard200();
		PhoneCard200 my200_2=new PhoneCard200();
		System.out.println("第一张200卡的卡号:"+my200_1.cardNumber);
		System.out.println("第二张200卡的卡号:"+my200_2.cardNumber);
    }
}
class PhoneCard200
{
	static long nextCardNumber;
	static String connnectNumber="200";
	static double additoryFee;
	long cardNumber;
	int password;
	boolean connected;
	double balance;
	
	static
	{
		nextCardNumber=2001800001;
	}
	PhoneCard200()
	{
		cardNumber=nextCardNumber++;
    }
}