Java hashmap with JButton and String

Hello i have a problem i have a simple app:

private JButton a,b,c,d;

private Map test= new HashMap<>()







When i try to print it it saying is null. But when i using a loop for

for(Map.Entry e : test.entrySet())


JButton key = e.getKey();

String value = e.getValue();

System.out.println(key+" "+value);

key = new JButton(value);


Is printing only last value with null key. I have no idea why i have null keys and why is only printing one value?...

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By: StackOverFlow - Tuesday, 13 March

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