Java Reflection API - Getting the value of a String[] field

Question

I was wondering if it is possible to grab a String[] of an unknown size from a class using the java reflection API and store it elsewhere?

Thanks.

Yes, you do it with String[] just like with any other type. — Nikita Rybak
– Nikita Rybak, Commented Oct 7, 2010 at 4:14

ColinD · Accepted Answer · 2010-10-07 04:34:31Z

4

class Foo {
  private String[] bar;

  public Foo(String[] bar) {
    this.bar = bar;
  }

  public static void main(String[] args) throws Exception {
    Foo foo = new Foo(new String[] {"a", "b", "c"});
    Field barField = Foo.class.getDeclaredField("bar");
    String[] bar = (String[]) barField.get(foo);
    System.out.println(Arrays.toString(bar)); // [a, b, c]
  }
}

In addition to getDeclaredField(String), there's getField(String) and getFields() which only return public fields as well as getDeclaredFields() for all fields a class declares.

edited Oct 7, 2010 at 4:34

answered Oct 7, 2010 at 4:23

ColinD

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