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how do you know what parameters go inside the parentheses when creating a new object?
i am beginning to learn programming and started java.
so sometimes i see codes like:
Shape ball= new Shape();.// takes no parameter Shape ball= new Shape(1,2); //takes parameter
So if there's like more than one constructor(or methods) in the subclass, how do you know which parameters to take?
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Re: how do you know what parameters go inside the parentheses when creating a new object?
Do you mean how does the programmer/user know which overloaded function to call, or how does the compiler know which function to call?
The programmer/user knows by either reading the documentation, or by reading the source code.
The compiler "knows" iff (if and only if) the type of the parameters can be unambiguously matched with one of the overloads. Note that the return type is not included in this calculation! So in your example:
bango (July 19th, 2013)
Re: how do you know what parameters go inside the parentheses when creating a new object?
Yeah I figured it out after I learnt about constructoroverloading. Thank you
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