Java：如何移动多维数组的内容？

Question

I'm currently working on a small project. I'm writing a simple java program for the L game. I need to write a method that will move the content of a 4x4 array. This method will take in (row, column) parameters. and the contents will move accordingly.

{ 'x',' ',' ',' ' }, 

{ 'x',' ',' ',' ' },

{ 'x','x',' ',' ' },

{ ' ',' ',' ',' ' }

move (0, 2) --->

{ ' ',' ','x',' ' },

{ ' ',' ','x',' ' },

{ ' ',' ','x','x' },

{ ' ',' ',' ',' ' }

I'm not sure where to start. I really appreciate any help given on this. Thank you so much for your help.

Answer 1

your method should look something like this

char[][] array = new char[4][4];

public static void move(row, column){
    for (int i = 0, i < 4; i++) {
        for (int j = 0; j < 4; j++){
            if (array[i][j] != null) {
                // add rows and column accordingly
                array[i + row][j + column] = array[i][j];
                array[i][j] = null;
            }
        }
    }
}

This is considering there is only one x per line, which in your case, some lines have two. I'll let you figure that one out.

Answer 2

    int moverow = 0;
    int moveCol = 2;

    for(int i = 0; i <=3; i++){
        for(int j = 0; j <=3; j++){
            int currentValue = board[i][j];
            //shifting value
            int shiftX = i + moverow;
            int shiftY = j + moveCol;
            // discarding the value if index overflows
            if(shiftX > 3 || shiftY > 3){

                // setting initial value on the original index.
                board[i][j] = 0;
                break;
            }else{
                board[shiftX][shiftY] = currentValue;
                // setting initial value on the original index.
                board[i][j] = 0;
            }
        }
    }