java - Why do I get a message that my array is empty even after initializing it? -

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this part of project i'm working on, when try insert elements array geneids error: 

java.lang.arrayindexoutofboundsexception: 0

i have initialized array couple of lines before, why can't insert elements it?

else if (line.startswith("!dataset_table_begin")) {     line = bufferedreader.readline();     string[] array = line.split("\t");     dataset.sampleids = arrays.copyofrange(array, 2, array.length);     dataset.geneids = new string[(dataset.genesnumber)];     dataset.genesymbols = new string[(dataset.genesnumber)];     dataset.datamatrix = new float[dataset.genesnumber][dataset.samplesnumber];     int count = 0;     while ((line = bufferedreader.readline()) != "!dataset_table_end") {         string[] arry = line.split("\t");         system.out.println(arry[0]);         dataset.geneids[count] = arry[0];         dataset.genesymbols[count] = arry[1];         (int = 2; < dataset.samplesnumber; i++) {             dataset.datamatrix[count][i] = float.parsefloat(arry[i]);         }         count++;     } }

you have initialized array results of split.

if character in line tab character, you'll empty array result.

before using element in array should check length.

alternatively, use line.split( "\t", 2 ). return 2 elements in array though both empty.


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