Question

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What is the Java ?: operator called and what does it do?

Hello I have some problems understanding the fallowing code, could anyone help me get this?

private Comparable elementAt( BinaryNode t ) {
    return t == null ? null : t.element;
}

I don’t understand what t == null ? null : t.element; means.

Answer 1

return t == null ? null : t.element; means

if (t==null)
  return null;
else
  return t.element;

see also http://en.wikipedia.org/wiki/%3F:#Java