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Reference type
class Person { int value; Person() { value=0; } } class HelloWorld { public static void main(String[] args) { System.out.println("Hello World"); Person p=new Person(); System.out.println(p.value); //setValue(p,100); HelloWorld h=new HelloWorld(); h.setValue(p,100); System.out.println(p.value); } static void setValue(Person p, int v) { p.value=v; } }
p.value has changed from 0 to 100.
Re: Reference type
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Re: Reference type
Yes. Was this your question or doubt?Originally Posted by gunitinug
setValue receives a copy of the reference to the Person object instantiated in main. This means that setValue cannot change the value of the 'p' variable in the main ..... but can change the state of the object, if it has accessible instance variables or any "mutator" methods.
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