魔方可以对它的6个面自由旋转。

我们来操作一个2阶魔方(如图1所示):

Java实现二阶魔方旋转_java

为了描述方便,我们为它建立了坐标系。

各个面的初始状态如下:
x轴正向:绿
x轴反向:蓝
y轴正向:红
y轴反向:橙
z轴正向:白
z轴反向:黄

假设我们规定,只能对该魔方进行3种操作。分别标记为:
x 表示在x轴正向做顺时针旋转
y 表示在y轴正向做顺时针旋转
z 表示在z轴正向做顺时针旋转

xyz 则表示顺序执行x,y,z 3个操作

题目的要求是:
从标准输入获得一个串,表示操作序列。
程序输出:距离我们最近的那个小方块的3个面的颜色。
顺序是:x面,y面,z面。

例如:在初始状态,应该输出:
绿红白

初始状态下,如果用户输入:
x
则应该输出:
绿白橙

初始状态下,如果用户输入:
zyx
则应该输出:
红白绿

请编程实现所述功能。

import java.util.Scanner;

public class Main {
    public int[] Now = {1, 1, 1, 1}; //正前方
    public int[] Back = {2, 2, 2, 2};
    public int[] Left = {3, 3, 3, 3};
    public int[] Right = {4, 4, 4, 4};
    public int[] Up = {5, 5, 5, 5};
    public int[] Down = {6, 6, 6, 6};
    
    public void reverseX() {
        int[] value = new int[8];
        value[0] = Up[2];
        value[1] = Up[3];
        value[2] = Right[0];
        value[3] = Right[2];
        value[4] = Down[2];
        value[5] = Down[3];
        value[6] = Left[3];
        value[7] = Left[0];
        Up[2] = value[6];
        Up[3] = value[7];
        Right[0] = value[0];
        Right[2] = value[1];
        Down[2] = value[2];
        Down[3] = value[3];
        Left[3] = value[4];
        Left[0] = value[5];
        value[0] = Now[0];
        value[1] = Now[1];
        value[2] = Now[2];
        value[3] = Now[3];
        Now[0] = value[3];
        Now[1] = value[0];
        Now[2] = value[1];
        Now[3] = value[2];
    }
    
    public void reverseY() {
        int[] value = new int[8];
        value[0] = Up[3];
        value[1] = Up[1];
        value[2] = Back[1];
        value[3] = Back[2];
        value[4] = Down[1];
        value[5] = Down[2];
        value[6] = Now[2];
        value[7] = Now[1];
        Up[3] = value[6];
        Up[1] = value[7];
        Back[1] = value[0];
        Back[2] = value[1];
        Down[1] = value[2];
        Down[2] = value[3];
        Now[2] = value[4];
        Now[1] = value[5];
        value[0] = Right[0];
        value[1] = Right[1];
        value[2] = Right[2];
        value[3] = Right[3];
        Right[0] = value[2];
        Right[1] = value[0];
        Right[2] = value[3];
        Right[3] = value[1];
     }
    
    public void reverseZ() {
        int[] value = new int[8];
        value[0] = Now[1];
        value[1] = Now[0];
        value[2] = Left[0];
        value[3] = Left[1];
        value[4] = Back[0];
        value[5] = Back[1];
        value[6] = Right[1];
        value[7] = Right[0];
        Now[1] = value[6];
        Now[0] = value[7];
        Left[0] = value[0];
        Left[1] = value[1];
        Back[0] = value[2];
        Back[1] = value[3];
        Right[1] = value[4];
        Right[0] = value[5];
        value[0] = Up[0];
        value[1] = Up[1];
        value[2] = Up[2];
        value[3] = Up[3];
        Up[0] = value[2];
        Up[1] = value[0];
        Up[2] = value[3];
        Up[3] = value[1];
    }
    
    public void getResult(String A) {
        String[] color = {"", "绿", "蓝", "橙", "红", "白", "黄"};
        for(int i = 0;i < A.length();i++) {
            char j = A.charAt(i);
            if(j == 'x')
                reverseX();
            else if(j == 'y')
                reverseY();
            else if(j == 'z')
                reverseZ();
        }
        int[] result = new int[3];
        result[0] = Now[1];
        result[1] = Right[0];
        result[2] = Up[3];
        for(int i = 0;i < 3;i++)
            System.out.print(color[result[i]]);
    }
    
    public static void main(String[] args) {
        Main test = new Main();
        Scanner in = new Scanner(System.in);
        String A = in.next();
        test.getResult(A);
    }
}