可能的精度损失要求int发现双精度数组

Question

I have read a file and require the variables to be doubles as they are decimals. So have done this:

String[] data = list.split("\\t");

        homes = Double.parseDouble(data[0]);
        rate = Double.parseDouble(data[1]);

I am now trying to put the data in an array but am getting the following error:

possible loss of precision
required: int
found: double array

I need the variables homes and rate to be in an array in order to do a calculation and need them to be doubles as rate is a percentage in decimal:

private boolean [][] place = new boolean [homes][rate];

How can I stop this error?

Answer 1

You get the error because you need to initialize your array using Integer sizes, not double s. So you need to convert the doubles to integers.

Change

private boolean [][] place = new boolean [homes][rate];

to

private boolean [][] place = new boolean [(int)homes][(int)rate];

Answer 2

arrays by definition are indexed using integer positions . There is no slot number 9 3/4; that only exists in Harry Potter. You literally have to think of an array to look like this: {true, false, true} - what is the value at "1.75"?!?

If you want to "index" using arbitrary values, you may be looking for a dictionary , aka a java.collections.Map which maps keys (like 9.75) to values; or use a translation table from keys to indexes.