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ArrayList sorting

 
Jeansonne Pierre
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this code compiled succeed, but come out with warning message as below

Note: .\Sorting.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.


which part of code should i modify or improve to remove the warning messages?

Please help.
Thanks in advance
 
Winston Gutkowski
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Jeansonne Pierre wrote:which part of code should i modify or improve to remove the warning messages?

Add a type to your Arraylist, viz:
ArrayList<Double> arrayList = new ArrayList<Double>();

Winston
 
Jeansonne Pierre
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Thanks Winston Gutkowski,

the warning messages gone and it succeed.

anyway, I'm wondering why it is

instead of ?

as the method argument received is in double primitive type.
 
Winston Gutkowski
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Jeansonne Pierre wrote:anyway, I'm wondering why it is

as the method argument received is in double primitive type.

Because types must be objects. An ArrayList can't hold doubles.

Winston
 
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