APFIVE Recursive String Method Trace
Consider the following recursive method.
public boolean isNestedProperly(String s) {
if (s.isEmpty())
return true;
else if (s.charAt(0) == 'x' && s.charAt(s.length() - 1) == 'x')
return isNestedProperly(s.substring(1, s.length() - 1));
else
return false;
}
What is returned as a result of the call isNestedProperly("xxxx")?
A
The function returns nothing; there is a compilation error
B
The function throws an exception
C
false
D
true
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