Android : android.utils.Base64.encode gets different value

When I try this:

map.put("password1", Base64.encode("111111".getBytes(),Base64.DEFAULT));
map.put("password2", Base64.encode("111111".getBytes(),Base64.DEFAULT));
map.put("password3", Base64.encode("111111".getBytes(),Base64.DEFAULT));

I got different value of password1,password2 and password3:

password1:[B@5368aecc

password2:[B@536e9ea0

password3:[B@536c0dec

Is it should be the same value? Thanks in advance.