创建具有2D泛型数组字段的泛型Java类

public class GenericClass<T> {
    private T[][] array;

    public GenericClass(int rows, int columns) {
        array = (T[][]) new Object[rows][columns];
    }

    public void setElement(int row, int column, T element) {
        array[row][column] = element;
    }

    public T getElement(int row, int column) {
        return array[row][column];
    }

    public static void main(String[] args) {
        GenericClass<Integer> genericClass = new GenericClass<>(3, 3);
        genericClass.setElement(0, 0, 1);
        genericClass.setElement(1, 1, 2);
        genericClass.setElement(2, 2, 3);

        System.out.println(genericClass.getElement(0, 0));  // Output: 1
        System.out.println(genericClass.getElement(1, 1));  // Output: 2
        System.out.println(genericClass.getElement(2, 2));  // Output: 3
    }
}