张思渊-202401070104-w3

w3/Car.java

@@ -0,0 +1,83 @@
+package com.rental;
+public class Car{
+	//私有属性
+	private String licensePlate;
+	private String brand;
+	private String model;
+	private double dailyRent;
+	private boolean isRented;
+	//静态变量
+	private static int totalCars = 0;
+	//构造方法
+	public Car(String licensePlate,String brand,String model,double dailyRent){
+		this.licensePlate =	licensePlate;
+		this.brand = brand;
+		this.model = brand;
+		setDailyRent(dailyRent);
+		this.isRented = false;
+		totalCars++;
+	}
+	public Car(String licensePlate,String brand,String model){
+		this(licensePlate,brand,model,300.0);
+	}
+	//Getter/Setter规则
+	public String getLicensePlate(){
+		return licensePlate;
+	}
+	public String getBrand(){
+		return brand;
+	}
+	public String getModel(){
+		return model;
+	}
+	public double getDailyRent(){
+		return this.dailyRent;
+	}
+	public boolean isRented(){
+		return isRented;
+	}
+	public void setBrand(String brand){
+		this.brand=brand;
+	}
+	public void setModel(String model){
+		this.model=model;
+	}
+	public void setDailyRent(double dailyRent){
+		if (dailyRent>0){
+			this.dailyRent=dailyRent;
+		}else{
+			System.out.println("日租金必须大于0，设置失败，保持原值。");
+		}
+	}
+	//业务方法
+	public void rentCar() {
+        if (this.isRented) {
+            System.out.println("车辆已租出，无法再次租用。");
+        } else {
+            this.isRented = true;
+            System.out.println("车辆" + this.licensePlate + "租用成功。");
+        }
+    }
+    public void returnCar() {
+        if (!this.isRented) {
+            System.out.println("车辆未被租用，无需归还。");
+        } else {
+            this.isRented = false;
+            System.out.println("车辆" + this.licensePlate + "归还成功。");
+        }
+    }
+    public double calculateRent(int days) {
+        return this.dailyRent * days;
+    }
+    //静态方法
+    public static int getTotalCars() {
+        return totalCars;
+    }
+    //displayInfo方法
+    public void displayInfo() {
+        String status = this.isRented ? "已租出" : "可租";
+        System.out.println("车牌: " + this.licensePlate + ", 品牌: " + this.brand + 
+                           ", 型号: " + this.model + ", 日租金: " + this.dailyRent + 
+                           "元/天, 状态: " + status);
+    }
+}