Notes

public class Main
{
public static void main(String[] args)
{
task01();
task02();
task03();
task04();
//task05();
}

private static void task01()
{
int arr[][] = new int[8][8];

for (int i = 0; i < arr.length; ++i)
{
for (int j = 0; j < arr[i].length; ++j)
{
arr[i][j] = (int) (Math.random() * 10);
}
}

System.out.println(threeSameNumbersOccur(arr));
}

private static boolean threeSameNumbersOccur(int[][] arr)
{
int occurrences = 0;

for (int n = 0; n < 10; ++n)
{
occurrences = 0;
for (int i = 0; i < arr.length; ++i)
{
if (arr[i][i] == n || arr[arr.length - i - 1][arr.length - i - 1] == n)
{
occurrences++;
}
}

if (occurrences >= 3)
{
return true;
}
}


return false;
}

private static void task02()
{
char arr[][] = new char[10][10];

for (int i = 0; i < arr.length; ++i)
{
for (int j = 0; j < arr[i].length; ++j)
{
arr[i][j] = (char) ((Math.random() * 'z' - 'a' + 1) + 'a');
}
}

System.out.println(threeGreaterNumbersExist(arr));
}

private static boolean threeGreaterNumbersExist(char[][] arr)
{
char[] singleArray = toSingleArray(arr);

for (int i = 0; i < singleArray.length - 2; ++i)
{
if (singleArray[i + 2] > singleArray[i + 1] && singleArray[i + 1] > singleArray[i])
{
return true;
}
}

return false;
}

private static char[] toSingleArray(char arr[][])
{
char[] returnArray = new char[arr.length * 2 - 1 + arr[0].length * 2 - 1];
int arrIndex = 0;

for (int i = 0; i < arr.length; ++i)
{
if (i == 0 || i == arr.length - 1)
{
for (int j = 0; j < arr[0].length; ++j)
{
returnArray[arrIndex++] = arr[i][j];
}
}
else
{
returnArray[arrIndex++] = arr[i][0];
returnArray[arrIndex++] = arr[i][arr.length - 1];
}
}

return returnArray;
}

private static void task03()
{
//isEqual();
}

private static void task04()
{
char[][] level = new char[6][6];

char nextPlayer = 'x';

for (int i = 0; i < level.length; ++i)
{
for (int j = 0; j < level.length; ++j)
{
int arr[];

do
{
arr = rollDice();
} while (level[arr[0] - 1][arr[1] - 1] != 0);

level[arr[0] - 1][arr[1] - 1] = nextPlayer;

nextPlayer = (nextPlayer == 'x') ? 'o' : 'x';
}
}

for(var x: level)
{
for(var y: x)
{
System.out.print(y);
}
System.out.println();
}
}

private static int[] rollDice()
{
int[] arr = new int[2];
arr[0] = (int) ((Math.random() * 6 + 1 - 1) + 1);
arr[1] = (int) ((Math.random() * 6 + 1 - 1) + 1);

return arr;
}

// private static void task05()
// {
// char[][] level = new char[3][3];
//
// System.out.println(isWinImpossible(level));
// }
//
// private static boolean isWinImpossible(char[][] level)
// {
//
// }

@SuppressWarnings("unused")
private static boolean isEqual(int[][] arr1, int [][]arr2)
{
if (arr1.length != arr2.length)
{
return false;
}

for (int i = 0; i < arr1.length; ++i)
{
if (arr1[i].length != arr2[i].length)
{
return false;
}
}

for (int i = 0; i < arr1.length; ++i)
{
for (int j = 0; j < arr1[i].length; ++j)
{
if (arr1[i][j] != arr2[i][j])
{
return false;
}
}
}

return true;
}
}