CODEWITHSUNDEEP
javasplit
victorpacheco3107
victorpacheco3107

Reputation: 862

Possible error in String's split method

I have de next code:

String test = "A,B,,,,,";

String[] result = test.split(",");

for(String s : result){
    System.out.println("$"+s+"$");
}

The output is:

$A$
$B$

and y I expected:

$A$
$B$
$$
$$
$$
$$
$$

but, I modified the code as follows:

String test = "A,B,,,,,C";

String[] result = test.split(",");

for(String s : result){
    System.out.println("$"+s+"$");
}

and the result is:

$A$
$B$
$$
$$
$$
$$
$C$

other variation:

String test = "A,B,,,C,,";

String[] result = test.split(",");

for(String s : result){
    System.out.println("$"+s+"$");
}

the result:

$A$
$B$
$$
$$
$C$

any idea?

I need this for convert csv file to java objects, but when they don't send me the last column the code not work correctly

Upvotes: 3

Views: 449

Answers (4)

victorpacheco3107
victorpacheco3107

Reputation: 862

I have the solution thanks to @ZouZou, is the next:

String test = "A,B,,,C,,";

String[] result = test.split(",",test.length()); // or the number of elements you expect in the result

for(String s : result){
    System.out.println("$"+s+"$");
}

Upvotes: 0

Felipe Antonio
Felipe Antonio

Reputation: 29

i did this code right now, it worked fine for me, try this:

String test = "A,B,,,,,";
    int i;
    int countOfCommas = 0;
    int countOfLetters = 0;
    String[] testArray = test.split("");
    String[] result = test.split(",");

    for(i=0;i<=test.length();i++)
        if(testArray[i].equals(","))
            countOfCommas++;

    for(String s : result){
        System.out.println("$"+s+"$");
    }

    if(test.length() > result.length)
        countOfLetters = test.length()-countOfCommas;

    for(i=0;i<(test.length()-countOfLetters)-result.length;i++)
        System.out.println("$$");

Upvotes: 1

piet.t
piet.t

Reputation: 11911

As Jeroen Vannevel stated this is documented behaviour of String.split(). If you need to kepp all empty Strings just use test.split(",",-1)

Upvotes: 0

Jeroen Vannevel
Jeroen Vannevel

Reputation: 44439

From the docs:

This method works as if by invoking the two-argument split method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.

Upvotes: 2

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