2016/4/13

String s = "1,2;3,4,5;6,7,8";String[] s1=s.split(";");double [][]shuzu=new double[s1.length][];int num=s1.length;for(int i =0;i<num;i++){    String[] s2=s1[i].split(",");    int num2 = s2.length;    for(int j=0;j<num2;j++){       /* shuzu[i][j]=Double.parseDouble(s2[j]);*/        shuzu[i]=new double[num2];        shuzu[i][j]=Double.parseDouble(s2[j]);        System.out.print(shuzu[i][j]+" ");    }    System.out.println();}

定义二维数组时，一定要分别定义数组两个维度的大小，否则会出现空指针异常！