编写一个方法，返回一个double类型的二维数组，数组中的元素通过解析字符串参数获得，如字符串参数：“1,2;3,4;5,6;7,8”

public class Test {
    public static void main(String args[]) {
        String s = "1,2;3,4;5,6;7,8";
        String[] sFirst = s.split(";");
        double[][] d;
        d = new double[sFirst.length][2];
        for(int i = 0; i<sFirst.length; i++) {
            String[] sSecond = sFirst[i].split(",");
            d[i] = new double[sSecond.length];
            for(int j =0; j < sSecond.length; j++) {
                d[i][j] = Double.parseDouble(sSecond[j]);
            }
        }
        for(int i = 0;i < d.length; i++) {
            for(int j = 0; j < d[i].length; j++) {
                System.out.println(d[i][j]);
            }
            System.out.println();
        }
        
    }
    
}