java如何實(shí)現順時(shí)針/逆時(shí)針打印矩陣操作

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java實(shí)現的順時(shí)針/逆時(shí)針打印矩陣操作。具體如下：

public class SnakeMatrix {  /**   * 定義矩陣的階數   */  private int n;  //填充矩陣的值  private int k = 1;  private int[][] data;  /**   * 定義矩陣移動(dòng)的方向   */  public enum Direction {    left, right, up, down,  }  SnakeMatrix(int n) {    this.n = n;    data = new int[n][n];  }  public void clockwisePrintMatrix() {    //定義行數    int rowLen = data.length;    //定義列數    int columnLen = data.length;    //移動(dòng)方向    Direction direction = Direction.right;    //定義上邊界    int upBound = 0;    //定義下邊界    int downBound = rowLen - 1;    //定義左邊界    int leftBound = 0;    //定義右邊界    int rightBound = columnLen - 1;    //矩陣當前行數    int row = 0;    //矩陣當前列數    int column = 0;    while (true) {      data[row][column] = k++;      if (upBound == downBound && leftBound == rightBound) {        // System.out.println(" upBound :"+upBound +" downBound :"+downBound+" leftBound :"+leftBound +" rightBound :"+rightBound);        break;      }      switch (direction) {        case right:          if (column < rightBound) {            ++column;          } else {            ++row;            direction = Direction.down;            ++upBound;          }          break;        case down:          if (row < downBound) {            ++row;          } else {            --column;            direction = Direction.left;            --rightBound;          }          break;        case up:          if (row > upBound) {            --row;          } else {            ++column;            direction = Direction.right;            ++leftBound;          }          break;        case left:          if (column > leftBound) {            --column;          } else {            --row;            direction = Direction.up;            --downBound;          }          break;        default:          break;      }    }    for (int i = 0; i < n; i++) {      for (int j = 0; j < n; j++) {        System.out.printf("%2d%s", data[i][j], " ");      }      System.out.println();    }  }  public void anticlockwisePrintMatrix() {    int rowLen = data.length;    int columnLen = data.length;    int leftBound = 0;    int rightBound = columnLen - 1;    int upBound = 0;    int downBound = rowLen - 1;    int row = 0;    int column = 0;    Direction direction = Direction.down;    while (true) {      data[row][column] = k++;      if (rightBound == leftBound && upBound == downBound) {        break;      }      switch (direction) {        case down:          if (row < downBound) {            row++;          } else {            column++;            direction = Direction.right;            leftBound++;          }          break;        case right:          if (column < rightBound) {            column++;          } else {            row--;            direction = Direction.up;            downBound--;          }          break;        case up:          if (row > upBound) {            row--;          } else {            direction = Direction.left;            column--;            rightBound--;          }          break;        case left:          if (column > leftBound) {            column--;          } else {            direction = Direction.down;            row++;            upBound++;          }          break;        default:          break;      }    }    for (int i = 0; i < n; i++) {      for (int j = 0; j < n; j++) {        System.out.printf("%2d%s", data[i][j], " ");      }      System.out.println();    }  }}

首先呢上面是定義一個(gè)工具類(lèi)，

public class MainActivity extends AppCompatActivity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    int number = 5;    SnakeMatrix snakeMatrix = new SnakeMatrix(number);    snakeMatrix.anticlockwisePrintMatrix();    //snakeMatrix.clockwisePrintMatrix();  }}

直接進(jìn)行使用，有兩個(gè)方法，一個(gè)正序一個(gè)倒序