static属性变量与static块含有相同变量的执行情况

[java]代码库

package gps.start;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.Scanner;
import gps.car.Car;
/**
 * 
 * @author 锋客
 * 重点：
 * 1.关于static的属性与static的块
 *        当二者中都存在Car Mazda=new Car("123", "Mercedes_Benz", "RED")时，
 *        二者 Mazda不同，不共用，快中的变量不会影响static属性的全局属性值；
 *        当static快中调用static属性Mazda时，会共用这个变量；
 * 2.执行顺序：根据书写顺序依次执行，不分块和属性；
 *
 */

public class StartGame {
	static ArrayList<Car> list_car = new ArrayList<Car>();
	public static Car Mercedes_Benz=new Car("123", "Mercedes_Benz", "RED");
	public static Car Mazda;
	public static Car Porsche;
	public static Car car_temp1;
	public static Car car_temp2;

	static {
//该方法不会重置class中的属性
//		Car Mercedes_Benz = new Car("12345", "Benz", "blue");
//		Car Mazda = new Car("23456", "Mazda", "red");
//		Car Porsche = new Car("34567", "Porsche", "black");
//		Car car_temp1 = new Car();
//		Car car_temp2 = new Car();
//		System.out.println("static块执行了！！！！");
//		System.out.println(Mercedes_Benz);
		
		 Mercedes_Benz = new Car("12345", "Benz", "blue");
		 Mazda = new Car("23456", "Mazda", "red");
		 Porsche = new Car("34567", "Porsche", "black");
		 car_temp1 = new Car();
		 car_temp2 = new Car();
		System.out.println("static块执行了！！！！");
		System.out.println(Mercedes_Benz);

	}
//主方法：设置主方法
	public static void main(String[] args) {
		StartGame game = new StartGame();
		System.out.println("--------------------");
		//生成自己车辆信息
		Car userCar=game.ready();
		//抢车位正式开始
		while(true){
		System.out.println("------!!!!!!!!!-------");
		System.out.println("输入抢占的车位号：");
		Scanner input=new Scanner(System.in);
		int num=input.nextInt();
		//每次都调用start（）方法重置list_car中车辆顺序
		if(game.Start(num)){
			System.out.println("抢占成功！！！");
		}else{
			System.out.println("抢占失败！！！");
		}
		}
	}

	/**
	 * 生成自己车辆信息
	 * 
	 * @return
	 */
	public Car ready() {
		System.out.println("请输入车辆信息：");
		Scanner cursor = new Scanner(System.in);
		System.out.println("车牌：");
		String id = cursor.next();
		System.out.println("类型：");
		String type = cursor.next();
		System.out.println("颜色：");
		String colour = cursor.next();
		Car userCar = new Car(id, type, colour);
		list_car.add(userCar);
		return userCar;
	}

	/**
	 * 抢占车位
	 * 
	 * @param car
	 * @return
	 */
	public boolean Start(int num) {
		Random random = new Random();
		list_car.add(new Car());
		list_car.add(new Car());
		list_car.add(new Car());
		list_car.add(new Car());
		list_car.add(new Car());
		// 检测list_car存的内容
		// for(int i=0;i<list_car.size();i++){
		// System.out.println(list_car.get(i));
		// }
		int index = random.nextInt(4);
		list_car.set(index, Mercedes_Benz);
		list_car.set((index + 1) % 5, car_temp2);
		list_car.set((index + 2) % 5, StartGame.Mazda);
		list_car.set((index + 3) % 5, car_temp1);
		list_car.set((index + 4) % 5, Porsche);
		if(list_car.get(num).getId()!=null){
			return false;
		}
		return true;

	}

}

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