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Editor to share with you java how to achieve clockwise / counterclockwise printing matrix operation, I believe that most people do not know much, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Clockwise / counterclockwise printing matrix operation realized by java. The details are as follows:

Public class SnakeMatrix {/ * defines the order of the matrix * / private int n; / / the value of the filling matrix private int k = 1; private int [] [] data; / * defines the direction of matrix movement * / public enum Direction {left, right, up, down,} SnakeMatrix (int n) {this.n = n; data = new int [n] [n] } public void clockwisePrintMatrix () {/ / define the number of rows int rowLen = data.length; / / define the number of columns int columnLen = data.length; / / move direction Direction direction = Direction.right; / / define the upper boundary int upBound = 0; / define the lower boundary int downBound = rowLen-1; / / define the left boundary int leftBound = 0; / / define the right boundary int rightBound = columnLen-1 / / current rows of matrix int row = 0; / current number of columns of matrix int column = 0; while (true) {data [row] [column] = kryptonite; 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; iTunes +) {for (int j = 0; j < n; jacks +) {System.out.printf ("% 2d%s", data [I] [j], ");} System.out.println ();}

First of all, the above is to define a tool class

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 ();}}

To use it directly, there are two methods, one in positive order and one in reverse order

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