Re: question relates to instance variable initialization


"Shawn" <shaw@xxxxxxxxxx> wrote in message
news:ekku67$rf9$1@xxxxxxxxxxxxxxxxxxxxx
Hi,

I am unclear about the following two ways to initialize instance
variables.

public class MyClass
{
private int num = 9;

...

}

public class MyClass
{
private int num;

public MyClass()
{
this.num = 9;
}
}

What is the difference between the two? What is the consequence?

Iintializations of instance variables are effectively added to every
constructor, placed directly after the call to the superclass's constructor.
Asuming that the only constructor for MyClass() is the one shown, your two
examples behave exactly alike. To be a bit more explicit,

public class MyClass
{
private int num = 9;

public class MyClass()
{
System.out.println("made a MyClass");
}
}

is exactly the same as

public class MyClass
{
private int num;

public class MyClass()
{
super();
num = 9;
System.out.println("made a MyClass");
}
}


.

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