Java syntax array

Question

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];

?

Answer 1

new float[]{factor} 

is just one type of array declarations in Java. It creates a new float array with factor value in it.

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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?

Answer 2

new float[]{factor}

This piece of code creates a float array with a single element and that element is factor.

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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.

Answer 3

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);

Answer 4

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.