How can I convert a String to an array?

Question

I need to convert a String to an array with objects (one object for each char of the string).

I have this code:

public void inputPin(String pin)
    {
        char[] charArray = pin.toCharArray();
        for(int i = 0;i < charArray.length;i++)
        {

        }

    }

I need to place inside the for loop a method like pressButton() and this method will receive as a parameter a String (that is one of the characters of the pin).

How can I get each of the characters of the array and use it as a parameter of the pressButton() method?

See http://stackoverflow.com/questions/3413586/string-to-string-array-conversion-in-java — cremersstijn, Sep 18 '13 at 13:57
Why not just get the size of the string and then create an array of objects based on that size? — bblincoe, Sep 18 '13 at 13:58
So...you're looking to a solution to cram into the `for` loop? — Justin Pearce, Sep 18 '13 at 13:58

score 1 · Answer 1 · answered Sep 18 '13 at 13:57

1

You can get array of symbols using split

pin.split("");

split will return array of String objects - you can convert it to char if you want

answered Sep 18 '13 at 13:57

sl4mmer

381
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score 1 · Answer 2 · answered Sep 18 '13 at 14:01

1

To convert a char into a String, use

String.valueOf([your char here])

You can also do it by using concatenation so

[yourchar] + ""

will return a String, too.

answered Sep 18 '13 at 14:01

productioncoder

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score 1 · Accepted Answer · edited Sep 18 '13 at 14:21

1

Try this

String pin = "Sample";
char[] charArray = pin.toCharArray();
for(char c : charArray)
{
    pressButton(""+c); // to convert char to String
}

edited Sep 18 '13 at 14:21

datahaki

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answered Sep 18 '13 at 14:01

commit

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It's issue with other point, just try to print all characters, give your detail code so it can be identify. – commit Sep 18 '13 at 14:52
I had a method calling to itself, that was the error. Finally your code worked fine. Thanks – asmundur Sep 18 '13 at 14:55

score 0 · Answer 4 · answered Sep 18 '13 at 13:57

Looking for something like this to get an array of Character object from resulting char array:

char[] charArray = pin.toCharArray();
Character[] objArray = new Character[charArray.length];
for (int i = 0; i < charArray.length; i++) {
    objArray[i] = new Character(charArray[i]);

score 0 · Answer 5 · answered Sep 18 '13 at 13:57

0

try this

    char[] charArray = pin.toCharArray();
    Character[] characterArray = new Character[charArray.length]; 
    for (int i = 0; i < charArray.length; i++) {
        characterArray[i] = charArray[i];
    }

answered Sep 18 '13 at 13:57

Evgeniy Dorofeev

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How can I convert a String to an array?

5 Answers5