以下是一个Java实现淡旺季飞机票打折的示例代码：

import java.time.LocalDate;  
public class FlightTicket {  
    private double price;  
    private LocalDate departureDate;  
    public FlightTicket(double price, LocalDate departureDate) {  
        this.price = price;  
        this.departureDate = departureDate;  
    }  
    public double getPrice() {  
        return price;  
    }  
    public LocalDate getDepartureDate() {  
        return departureDate;  
    }  
    public static void main(String[] args) {  
        // 创建示例机票  
        FlightTicket ticket1 = new FlightTicket(100.0, LocalDate.of(2021, 6, 1));  
        FlightTicket ticket2 = new FlightTicket(200.0, LocalDate.of(2021, 12, 1));  
        // 检查是否处于淡旺季并打折  
        if (isPeakSeason(ticket1.getDepartureDate())) {  
            ticket1 = discount(ticket1);  
        }  
        if (isPeakSeason(ticket2.getDepartureDate())) {  
            ticket2 = discount(ticket2);  
        }  
        // 输出打折后的价格  
        System.out.println("Ticket 1 price: " + ticket1.getPrice());  
        System.out.println("Ticket 2 price: " + ticket2.getPrice());  
    }  
    // 判断是否处于淡旺季  
    private static boolean isPeakSeason(LocalDate departureDate) {  
        int month = departureDate.getMonthValue();  
        return month >= 6 && month <= 8;  
    }  
    // 打折方法  
    private static FlightTicket discount(FlightTicket ticket) {  
        double discountedPrice = ticket.getPrice() * 0.9;  
        return new FlightTicket(discountedPrice, ticket.getDepartureDate());  
    }  
}  

上述示例代码中，我们创建了一个FlightTicket类来表示机票，其中包含价格和出发日期两个属性。在main方法中，我们创建了两张示例机票，并根据出发日期是否处于淡旺季来判断是否需要打折。如果是淡旺季，则调用discount方法对机票价格进行打折（90折），最后输出打折后的价格。

注意，这只是一个简单的示例代码，实际项目中可以根据需求进行修改和扩展。