HashMap<Integer,...> from Java: unexpected results
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Key: JRUBY-4551
URL: http://jira.codehaus.org/browse/JRUBY-4551
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.4
Environment: Windows Vista
Reporter: maarten mortier
In Java I have a HashMap<Integer, HashMap<...>> that maps record Id's to record
data.
In jRuby, if I run over this hash:
hash.each do |key, value|
# hash[key] = nil !
# hash[java.lang.Integer.new(key)] = value >> OK
end
I think a basic test for jruby should be, for all two-dimensional hashmaps:
assert(hash.all? {|key,value| hash[key] == value })
Similar issue is:
http://www.ruby-forum.com/topic/127884
Hi:
In the following program, the first 'puts' works but the second 'puts'
returns a nil. If I am accessing a java HashMap that has
java.lang.Integer keys, is there a simpler way to get values out of the
map than the h.get used with the first 'puts'?
Thanks,
David B.
require "java"
include_class "java.util.HashMap"
h = HashMap.new
h.put(java.lang.Integer.new(1), "aaa")
h.put(java.lang.Integer.new(2), "bbb")
puts h.get(java.lang.Integer.new(1)) # => "aaa" ... OK
puts h.get(1) # => nil ... no go
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