reflect: is a Field an Array?

[Mikhail Teterin]

Hello!

I'm going through the fields of a class one at a time and need to handle
differently depending on whether they are arrays or scalars.

What's the right way to make the distinction? The snippet below fails to
detect arrays :(

Thanks!

-mi

import java.lang.refle ct.*;
.....
for (Field field : getClass().getF ields()) {
Type type = field.getGeneri cType();

System.err.prin tln("Type of " + field + " is " + type + type.getClass() );
if (type instanceof GenericArrayTyp e)
System.err.prin tln(field + " is an array!");
else
System.err.prin tln(field + " is not an array");
}

[Robert Larsen]

Re: reflect: is a Field an Array?

Mikhail Teterin wrote:

Hello!
>
I'm going through the fields of a class one at a time and need to handle
differently depending on whether they are arrays or scalars.
>
What's the right way to make the distinction? The snippet below fails to
detect arrays :(
>
Thanks!
>
-mi
>
import java.lang.refle ct.*;
....
for (Field field : getClass().getF ields()) {
Type type = field.getGeneri cType();
>
System.err.prin tln("Type of " + field + " is " + type + type.getClass() );
if (type instanceof GenericArrayTyp e)
System.err.prin tln(field + " is an array!");
else
System.err.prin tln(field + " is not an array");
}

robert-desktop:~ $ cat Test.java
import java.lang.refle ct.*;

public class Test {
private int nonArray;
private int array[];

public Test() {
}

public static void main(String args[]) throws Exception {
Class c = Test.class;
for (Field f : c.getDeclaredFi elds()) {
System.out.prin tln("Field: " + f + " Is array: " +
f.getType().isA rray());
}
}
}
robert-desktop:~ $ javac Test.java
robert-desktop:~ $ java Test
Field: private int Test.nonArray Is array: false
Field: private int[] Test.array Is array: true
robert-desktop:~ $

[Mikhail Teterin]

Re: reflect: is a Field an Array?

Robert Larsen wrote:

f.getType().isA rray()

Many thanks!

-mi