Array as parametar

Question

I don't understand, and can't find on google how do I call my method, whose parameter is an array?

private static void printArray(double a[],int p){
        int count[]=new int[p];
        for(int i=0;i<a.length;i++){
            for(int j=0;j<p;j++){
                if((a[i]>=100/p*j) && (a[i]<100/p*(j+1))){
                    count[j]++;

for example, how do I call this method in my main method:

I tried printArray({1,2,3,4,5},5); and it's not working or printArray([10],5); but still doesn't work?

score 4 · Answer 1 · answered Nov 20 '15 at 20:15

4

You would first need to create an array. Like you did here:

int count[]=new int[p];

In your example something like

double myArray[] = {1,2,3,4,5};

Then you would pass the variable name to your method like:

printArray(myArray, someInt);

Hope this helps.

answered Nov 20 '15 at 20:15

Kyle Gowen

467
2
8

Thank you man! I appreciate it – Buzz Black Nov 20 '15 at 20:33
No prob. Did it work? – Kyle Gowen Nov 20 '15 at 20:35
yes :) Actually I created method double [] createArray(int n).. But was so stupid, didn't know to use it with another method. – Buzz Black Nov 20 '15 at 20:42
Great. Glad to hear it. – Kyle Gowen Nov 20 '15 at 20:43

Atri · Answer 2 · 2015-11-20T20:48:14.357

1

The issue with your calls is:

printArray({1,2,3,4,5},5); - {1,2,3,4,5} as a parameter is not recognized. You need to create an array which is of type double.
printArray([10],5); - [10] is also not recognized by the compiler and is not the correct way to pass double[].

This is how to initialize an array inline in java: new double[]{1,2,3,4,5}

So, this is how you call it:
printArray(new double[]{1,2,3,4,5},5);

edited Nov 20 '15 at 20:48

answered Nov 20 '15 at 20:15

Atri

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5
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double[] is not the same type as Double[]. And `new Double[](1,2,3,4,5)` is not valid Java. – JB Nizet Nov 20 '15 at 20:26
@JBNizet thanks for pointing out – Atri Nov 20 '15 at 20:51

score 0 · Answer 3 · answered Nov 20 '15 at 20:15

0

you can call your method like this, if the method is in the same class with method main.

 double[] arr = {1,2,3,4,5};
 printArray(arr,5);

answered Nov 20 '15 at 20:15

Abdelhak

8,299
4
22
36

score 0 · Answer 4 · edited Nov 20 '15 at 20:36

0

[10] is not a variable. When you pass an array you do not need brackets. Just the variable name. For example:

double array1[] = {10,12,13};
printArray(array1);

edited Nov 20 '15 at 20:36

JB Nizet

678,734
91
1,224
1,255

answered Nov 20 '15 at 20:16

Chris

62
11

That wouldn't compile. – JB Nizet Nov 20 '15 at 20:25
@JBNizet array1 needs to be initialized. – Chris Nov 20 '15 at 20:28
And that's precisely what the OP is asking: how to initialize a double array and pass it to a method. – JB Nizet Nov 20 '15 at 20:29
@JBNizet oops misread the question. Thanks for pointing that out – Chris Nov 20 '15 at 20:30

Array as parametar

4 Answers4