四向交叉口仿真

Question

我正在尝试编写一个程序，在四向交叉点显示灯光序列。

指令是：

在任何特定时间，交通只能朝一个方向移动。交通灯有三种颜色：RED，YELLOW和GREEN。基于一个事件。灯光以同步方式改变颜色，以便安全驾驶。定义一个名为“TrafficLight”的类，它有两个方法。一个叫做“改变”，另一个叫做“getColor”。在一个单独的类“Assignment5”中，通过主入口点，我希望您为北/南流量创建两个TrafficLight实例，为东/西流量创建两个。使用对象提供的两种方法我希望您显示已正确模拟四向交通灯。

到目前为止，我有：

 public class TrafficLight {

/**
 * @param args
 */
public TrafficLight(int c){
    this.c = c;

}//end constructor 

public int getC(){
    return c;
}

java.lang.String getColor;
    String n = "GYR";
    String s = "GYR";
    String e = "GYR";
    String w = "GYR";


public void change(){
    int c = 1;

     while (c <= 4){
         if (c == 1){
            n.charAt(2);
            s.charAt(2);
            e.charAt(0);
            w.charAt(0);
            c++;
         }
         else if (c == 2){
            n.charAt(2);
            s.charAt(2);
            e.charAt(1);
            w.charAt(1);
            c++;
         }
         else if (c == 3){
            n.charAt(0);
            s.charAt(0);
            e.charAt(2);
            w.charAt(2);
            c++;
         }
         else if (c == 4){
            n.charAt(1);
            s.charAt(1);
            e.charAt(2);
            w.charAt(2);
            c++;
         }

         while (c >= 5)
             if (c-4 == 1){
                n.charAt(2);
                s.charAt(2);
                e.charAt(0);
                w.charAt(0);
                c++;
             }
             else if (c-4 == 2){
                n.charAt(2);
                s.charAt(2);
                e.charAt(1);
                w.charAt(1);
                c++;
             }
             else if (c-4 == 3){
                n.charAt(0);
                s.charAt(0);
                e.charAt(2);
                w.charAt(2);
                c++;
             }
             else if (c-4 == 4){
                n.charAt(1);
                s.charAt(1);
                e.charAt(2);
                w.charAt(2);
                c++;
             }

        System.out.println(n);
        System.out.println(s);
        System.out.println(e);
        System.out.println(w);

     }//end inner while loop

}//end 'change'

 private int c;


 }//end class

示例输出应如下所示：

Traffic light event 1: 
North light: Red
South light: Red
East light: Green
West light: Green

Traffic light event 2: 
North light: Red
South light: Red
East light: Yellow
West light: Yellow

Traffic light event 3: 
North light: Green
South light: Green
East light: Red
West light: Red

Traffic light event 4: 
North light: Yellow
South light: Yellow
East light: Red
West light: Red

Traffic light event 5: 
North light: Red
South light: Red
East light: Green
West light: Green

Traffic light event 6: 
North light: Red
South light: Red
East light: Yellow
West light: Yellow

Traffic light event 7: 
North light: Green
South light: Green
East light: Red
West light: Red

Traffic light event 8: 
North light: Yellow
South light: Yellow
East light: Red
West light: Red

Traffic light event 9: 
North light: Red
South light: Red
East light: Green
West light: Green

Traffic light event 10: 
North light: Red
South light: Red
East light: Yellow
West light: Yellow

Traffic light event 11: 
North light: Green
South light: Green
East light: Red
West light: Red

Traffic light event 12: 
North light: Yellow
South light: Yellow
East light: Red
West light: Red

我将如何实现这一目标？有什么想法吗？