public class SpiralPrinter {

public static void print(int[][] matrix){

int lowerI = 0;

int upperI = matrix.length - 1;

int lowerJ = 0;

int upperJ = matrix[0].length - 1;

while(true){

if(canContinue(lowerI, upperI, lowerJ, upperJ)){

for (int j = lowerJ; j <= upperJ; j++)

System.out.print(matrix[lowerI][j] + " ");

lowerI++;

}

if(canContinue(lowerI, upperI, lowerJ, upperJ)){

for(int i = lowerI; i <= upperI; i++)

System.out.print(matrix[i][upperJ] + " ");

upperJ--;

}

if(canContinue(lowerI, upperI, lowerJ, upperJ)){

for(int j = upperJ; j>= lowerJ; j--)

System.out.print(matrix[upperI][j] + " ");

upperI--;

}

if(canContinue(lowerI, upperI, lowerJ, upperJ)){

for(int i = upperI; i>= lowerI; i--)

System.out.print(matrix[i][lowerJ] + " ");

lowerJ++;

}

if(!canContinue(lowerI, upperI, lowerJ, upperJ))

break;

}

System.out.println();

}

private static boolean canContinue(int lowerI, int upperI, int lowerJ, int upperJ) {

return lowerI <= upperI && lowerJ <= upperJ;

}

}