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Main Page → Exercises → Java → Solve an Exercise

Language/Type: Java Map TreeMap collections

What is the output of the following code?

Map map = new TreeMap();
map.put("K", "Schwarz");
map.put("C", "Lee");
map.put("M", "Sahami");
map.put("M", "Stepp");
map.remove("Stepp");
map.remove("K");
map.put("J", "Cain");
map.remove("C, Lee");
System.out.println(map);

output
{J=Cain, C=Lee, M=Sahami, M=Stepp} {C=Lee, J=Cain, M=Stepp, M=Sahami} {J=Cain, M=Sahami} {C=Lee, J=Cain, M=Stepp} (order shuffled)

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