将String转换为二维数组

Question

我试着转换这个字符串

s = [[4,2,2,4],[3,4,5,6],[6,7,8,9],[3,2,1,4]]
成二维数组,像这样
{4,2,2,4},
{3,4,5,6},
{6,7,8,9},
{3,2,1,4}

通过使用此代码

 int e=s.replaceAll("\\[", "").replaceAll(" ","").replaceAll("],","]").length();
        String[] rows1 = s.replaceAll("\\[", "").replaceAll(" ","").replaceAll("],","]").substring(0, e-2).split("]");

        String[][] matrix1 = new String[4][4]; 
        int r1 = 0;
        for (String row1 : rows1) {
            matrix[r1++] = row1.split(",");
        }

        System.out.println(Arrays.deepToString(matrix1));

但是有这样的问题

线程"main"中的异常java.lang.ArrayIndexOutOfBoundsException:3 at test.main(test.java:94)

你能帮我找一个解决方案吗？

Answer 1

我认为这段代码会对你有所帮助.仔细阅读所有评论.

     String s="[[4, 2, 2, 4], [3, 4, 5, 6], [6, 7, 8, 9], [3, 2, 1, 4]]";
     s=s.replace("[","");//replacing all [ to ""
     s=s.substring(0,s.length()-2);//ignoring last two ]]
     String s1[]=s.split("],");//separating all by "],"

     String my_matrics[][] = new String[s1.length][s1.length];//declaring two dimensional matrix for input

     for(int i=0;i<s1.length;i++){
         s1[i]=s1[i].trim();//ignoring all extra space if the string s1[i] has
         String single_int[]=s1[i].split(", ");//separating integers by ", "

         for(int j=0;j<single_int.length;j++){
             my_matrics[i][j]=single_int[j];//adding single values
         }
     }

     //printing result
     for(int i=0;i<4;i++){
         for(int j=0;j<4;j++){
             System.out.print(my_matrics[i][j]+" ");
         }
         System.out.println("");
     }

[[4,2,2,4],[3,4,5,6],[6,7,8,9],[3,2,1,4]]

逻辑:1)替换所有[到""现在我有 - > 4,2,2,4 ], 3,4,5,6 ], 6,7,8,9 ], 3,2,1,4 ] ]

2)用"]分开所有,"现在我有 - >

A)4,2,2,4

B)3,4,5,6

c)6,7,8,9

d)3,2,1,4

3)用","分离ABCD,现在我有 - >

A)a)4 b)2 c)2 d)4

B)a)3 b)4 c)5 d)6

c)a)6 b)7 c)8 d)9

d)a)3 b)2 c)1 d)4

Answer 2

这只是不会在行尾添加逗号：

    String s = "[[4, 2, 2, 4], [3, 4, 5, 6], [6, 7, 8, 9], [3, 2, 1, 4]]";
    for (String l: s.split("\\]\\s*,\\s*\\[")) {
        l = l.replaceAll("\\[", "").replaceAll("\\]", "");
        System.out.println("{" + l + "}");
    }