string to a char array in java

Question

I have this code and I want to put the string I have in a char array in java, but the problem I have is whenever I use toCharArray() the array reduces its index so, what can I do to keep the array by the same original index?

 public static void main(String[] args) {
    String str = "cat";
    char[][] carray;
    carray = new char[5][5];
    char[] chararray = new char[5];
    chararray = str.toCharArray();
    for(int i=0;i<5;i++){
        carray[i][0] = chararray[i];
    }
    System.out.println(carray);
    for(int i=0;i<5;i++){
        System.out.println("65"+carray[i][0]);
    }

if i keep the for loop for(int i=0;i<5;i++){ carray[i][0] = chararray[i]; } to i<5 it gives me an error that it exceeds index but if i make it i<3 it works fine — fayez jabra
– fayez jabra, Commented Apr 15, 2018 at 1:54
Please edit the question to add more information.... It's not really clear what you're trying to do. toCharArray doesn't alter index positions. And cat is only 3 letters, not 5. Plus, you do not need a char[][] to convert a string to a char array — OneCricketeer
– OneCricketeer, Commented Apr 15, 2018 at 1:55
this is an example or a small try out for a bigger project so i have a two dimensional array of char[][] but i also need to fill it from a string that a user inserts — fayez jabra
– fayez jabra, Commented Apr 15, 2018 at 1:58

OneCricketeer · Accepted Answer · 2018-04-15 01:55:53Z

1

Use str.charAt(i) instead of chararray[i]

That may be help.

edited Apr 15, 2018 at 1:55

OneCricketeer

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answered Apr 15, 2018 at 1:55

Sanjeev Chauhan

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1 Comment

fayez jabra Over a year ago

thank you that helped a lot instead of creating an array i can use this method and it solves my problem

Elliott Frisch · Accepted Answer · 2018-04-15 01:58:35Z

0

There are only three characters in "cat" (not five). Instead of hardcoding the length, use the String to determine the correct length. Also, your second array dimension should only be one (since you are only copying a single character at a time). Like,

String str = "cat";
char[] chararray = str.toCharArray();
char[][] carray = new char[chararray.length][1];
for (int i = 0; i < carray.length; i++) {
    carray[i][0] = chararray[i];
}
System.out.println(Arrays.deepToString(carray));
for (int i = 0; i < carray.length; i++) {
    System.out.println("65" + carray[i][0]);
}

answered Apr 15, 2018 at 1:58

Elliott Frisch

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