spiralmatrix.java

public class spiralmatrix {
    public static void printspiral(int matrix[][]){
        int startrow=0;
        int endrow=matrix.length-1;
        int startcol=0;
        int endcol=matrix[0].length-1;

        while(startrow<=endrow && startcol<=endcol){
            //top
            for(int j=startcol;j<=endcol;j++){
                System.out.print(matrix[startrow][j]+ " ");
            }

            //right
            for(int i=startrow+1;i<=endrow;i++){
                System.out.print(matrix[i][endcol]+ " ");
            }

                //bottom
                for(int j=endcol-1;j>=startcol;j--){
                    if(startrow==endrow){
                        break;
                    }
                    System.out.print(matrix[endrow][j] + " ");
                }

                //left
                for(int i=endrow-1;i>=startrow+1;i--){
                    if(startcol==endcol){
                        break;
                    }
                    System.out.print(matrix[i][startcol]+ " ");
                }
                startcol++;
                startrow++;
                endrow--;
                endcol--;
            }
            System.out.println();
        }
    public static void main(string args[]){
        int matrix[][]={{1,2,3,4},
                       {5,6,7,8},
                       {9,10,11,12},
                       {13,14,15,16}};
        printspiral(matrix);
    }
}