Getting java.lang.ArrayIndexOutOfBoundsException while splitting

Question

getting java.lang.ArrayIndexOutOfBoundsException this error please help.

Following is the code

public void extractData(String stringToExtract)
{       
        String metaDataValue = stringToExtract;
        //System.out.println(metaDataValue);

        String [] splitMetaDataValue =  metaDataValue.split(",");
        String [] tokenValue = null;
        for (int i = 0; i<splitMetaDataValue.length ; i++)
        {
            tokenValue = splitMetaDataValue[i].split(":");
            System.out.println(tokenValue[0]+"->"+tokenValue[1]);
        }
}//extractData

Answer 1

When splitting something, it's always recommended to check the result.

Before you do:

tokenValue = splitMetaDataValue[i].split(":");

Check the length of splitMetaDataValue.

Answer 2

splitMetaDataValue[i].split(":").length has to be 2 in order for the following to work:

System.out.println(tokenValue[0]+"->"+tokenValue[1]);

i.e.

tokenValue = splitMetaDataValue[i].split(":");

if (tokenValue.length > 1) {
    System.out.println(tokenValue[0]+"->"+tokenValue[1]);
}

Answer 3

You need to check the size of String[] tokenValue. The lines

System.out.println(tokenValue[0]+"->"+tokenValue[1]);

must be causing ArrayIndexOutOfBounds exception because they are assumptions that splitMetaDataValue[i] will contain ":".

Answer 4

The expression splitMetaDataValue[i].split(":") is not guaranteed to yield an array of 2 Strings - check the array length before attempting to access its elements

if (tokenValue.length >= 2) {
  System.out.println(tokenValue[0]+"->"+tokenValue[1]);
}