编写一个方法，返回double型二维数组“1，2；3，4，5；6，7，8”

public class TestDouble {
public static void main(String[] args) {
double[][] d;
String s = "1,2;3,4,5;6,7,8";
String[] s1 = s.split(";");
d = new double[s1.length][];
for(int i=0;i<s1.length;i++){
// 截出字符串
String [] s2 = s1[i].split(",");
d[i] = new double [s2.length];
for(int j=0; j<s2.length;j++){
d[i][j] = Double.parseDouble(s2[j]);
}
}
for(int i=0; i<d.length;i++){
for(int j=0;j<d[i].length;j++){
System.out.print(d[i][j]+" ");
}
System.out.println();
}
}

}