在Java中将2d整数数组转换为char和string

Question

How can I convert the ints in a 2d array into chars, and strings? (seperately)

If I copy ints to a char array i just get the ASCII code.

For example:

public int a[5][5] 

//some code

public String b[5][5] = public int a[5][5]

Thanks

Answer 1

This question is not very well-phrased at all. I THINK what you're asking is how to convert a two-level array of type int[][] to one of type String[][] .

Quite frankly, the easiest approach would simply leave your array as-is... and convert int values to String 's when you use them:

Integer.toString(a[5][5]);

Alternatively, you could start with a String[][] array in the first place, and simply convert your int values to String when adding them:

a[5][5] = new String(myInt);

If you really do need to convert an array of type int[][] to one of type String[][] , you would have to do so manually with a two-layer for() loop:

String[][] converted = new String[a.length][];
for(int index = 0; index < a.length; index++) {
    converted[index] = new String[a[index].length];
    for(int subIndex = 0; subIndex < a[index].length; subIndex++){
        converted[index][subIndex] = Integer.toString(a[index][subIndex]);
    }
}

All three of these approaches would work equally well for conversion to type char rather than String .

Answer 2

Your code must basically go through your array and transform each int value into a String. You can do this with the String.toString(int) method.

You can try that :

String[][] stringArray = new String[a.length][];
for(int i = 0; i < a.length; i++){
    stringArray[i] = new String[a[i].lenght];
    for(int j = 0; j < a[i].length; j++){
        stringArray[i][j] = Integer.toString(a[i][j]);
    }
}

Answer 3

如果要将int数字作为字符串，则可以使用Integer.toString()函数。

b[1][1] = Integer.toString(a[1][1]);

Answer 4

String [][]b = new String[a.length][];
for(int i=0; i<a.length; i++) {
  int [] row = a[i];
  b[i] = new String[row.length];
  for(int j=0; j<row.length; j++) {
    b[i][j] = Integer.toString(row[j]);
  }
}

Answer 5

要将2D数组转换为String，可以使用Arrays.deepToString(stringArr) 。