练习25

public class CreditCard {
double amount;
public static int times = 0;

public CreditCard(double amount) {
    times++;
    this.amount = amount;
}

public void output() {
    System.out.println("您有一笔大额消费，交易金额：" + amount + "元。");
}

public static void main(String[] args) {
    CreditCard cr = new CreditCard(1550);
    cr.output();
    CreditCard ce = new CreditCard(1920);
    ce.output();
    CreditCard cd = new CreditCard(1979);
    cd.output();
    CreditCard ci = new CreditCard(2259);
    ci.output();
    CreditCard ct = new CreditCard(1835);
    ct.output();
    CreditCard cc = new CreditCard(1799);
    cc.output();
    CreditCard ca = new CreditCard(2688);
    ca.output();
    System.out.println("您最近有" + CreditCard.times + "笔交易。");
}

}