two-dimensional arrays in Java -


just quick question - if instantiate new 2 dimensional int array so

int[][] input = new int[101][]; //number irrelevant

eclipse seems not mind this, i'm not entirely sure if work i'm expecting to, second part of array act dynamically.

after reading answers, realise question badly worded.

i reading in file - csv , there 101 columns , x amount of rows. since reading file in line-by-line, simple me figure out first dimension of "2-d array" 101. but, because reading file line-by-line, cannot second dimension x without iterating through entire file.

how find x using current method, or impossible?

then you'd have 101 elements in input null. create second dimension, you'd need initialize every item:

input[13] = new int[63]; input[14] = new int[128];

the second dimension doesn't need same first level items. second dimension would same if used this:

int[][] input = new int[101][50];

all values initialized 0.

but real answer is: why didn't try?


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