我正在尝试制作基于控制台的战舰游戏，但我不知道如何设置船只

Question

int randRow = rand.nextInt(rows-4);
int randColumn = rand.nextInt(columns); 

Here I check if my new ship doesn't interfere with my first ship. The entire array is filled with objects which contain a '.' char except for where the first ship is

if(field[randRow][randColumn].value == '.' &&
    field[randRow][randColumn+1].value == '.' &&
    field[randRow][randColumn+2].value == '.' &&
    field[randRow][randColumn+3].value == '.'){
        field[randRow][randColumn] = new Square('b');
        field[randRow+1][randColumn] = new Square('b');
        field[randRow+2][randColumn] = new Square('b');
        field[randRow+3][randColumn] = new Square('b');

} else{

If my new ship doesn't fit, I want to retry with different random values but I don't know how.

Answer 1

Basically you are not sure how to generate the random number again. Just use something like below

while(true) {
     //generate random number here
     if (can place battleship) {
          place battleship
          break //placed battleship so no need to retry. stop retrying
     }
     //else we will loop till we can place the battleship
}