I can never find what that code perform:
functionName(new float[]{factor});
is it array declaration? I mean:
new float[]{factor}
it is equal to
float[] arrayName = new float[factor];
?
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4 Answers
new float[]{factor}
is just one type of array declarations in Java. It creates a new float array with factor value in it.
Another ways how we can declare arrays:
For primitive types:
int[] myIntArray = new int[3];
int[] myIntArray = {1,2,3};
int[] myIntArray = new int[]{1,2,3};
For classes, for example String, it's the same:
String[] myStringArray = new String[3];
String[] myStringArray = {"a","b","c"};
String[] myStringArray = new String[]{"a","b","c"};
Source from How do I declare and initialize an array in Java?
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new float[]{factor}
This piece of code creates a float array with a single element and that element is factor.
functionName(new float[]{factor});
And this means that you're calling the method functionName() and passing a single-element float array to it, where that single element is factor.
Comments
It means you are passing an anonymous array to the function as an argument and No, it doesn't mean that factor is the length of array.
It means:
float factor = 0.5f;
float[] array = {factor};
function(array);
Comments
functionName(new float[]{factor});
Calls a function named: functionName passing a new array (anonymous) with one element as an argument, which is the contents of factor.
