any way to pass an int parameter as an one element int[]?

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hyena - 23 Nov 2006 12:49 GMT

Hi,

Just wondering if there exists such a ways that I can pass an "int" value
as an one element "int[]" array to a function in java? Some thing similiar
to:

int a = 0;
foo(&a);

foo(int[] A){...}//not sure if the syntax is right or not, did not use
C++ for long time

in C++.

thanks!

Sun

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Jan Thomä - 23 Nov 2006 12:55 GMT

Well,

if you use varargs syntax you can do it like this:

void foo( int .. A ) {
}

int a = 0;
foo( a );

Will put A automagically into an array. If you cannot use varargs (<1.5)
then you gotta do:

void foo( int [] A ) {

}

int a = 0;

foo ( new int [] {a} );

Greetings,
Jan

> Hi,
>
[quoted text clipped - 15 lines]
>
> Sun

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hyena - 23 Nov 2006 13:02 GMT

Thanks Jan. The second one is the answer to me. I am using 1.4.2.

> Well,
>
[quoted text clipped - 40 lines]
>>
>> Sun

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Thomas Schodt - 23 Nov 2006 13:48 GMT

> void foo( int [] A ) {
>
[quoted text clipped - 3 lines]
>
> foo ( new int [] {a} );

However, changing A[0] inside foo() has no effect on a.

public class Pass {
public static void main(String[] arg) {
new Pass().run();
}
void run() {
int a = 5;
foo(new int[]{a});
System.out.println(a);
}
void foo(int[] A) {
A[0] = 7;
}
}

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Andreas Leitgeb - 23 Nov 2006 17:14 GMT

>> void foo( int [] A ) {
>> }
>> int a = 0;
>> foo ( new int [] {a} );
>
> However, changing A[0] inside foo() has no effect on a.

to "fix" that:

int a = 0;
int[] ia = {a};
foo (ia);
a=ia[0];

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any way to pass an int parameter as an one element int[]?

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