Java解决输出数组问题

package test;

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

}