GC String

[Shivani Chandna]

In Sample 1 here : on Line 3 there will be no object that is Gc'ed where as in line 3 of Sample 2 there is One object that is Gc'ed/
Reason : In Sample 1 the string created is kept in the JVM pool - and hence not destroyed when referances to it are removed.

Please confirm by thinking,.

//SAMPLE 1: 
void fn()
{
 String s = "str";
 s= null; 
 //line 3 
}

//SAMPLE 2: 
void fn()
{
 String s = new String("str");
 s= null; 
 //line 3 
}
 

---
Shivani

[Sandeep Chhabra]

Hi,

I Think this is true that String Objects created in pool are never Garbage Collected, Whereas String Objects created by new keyword are created on heap and are Garbage Collected.

[Bert Bates]

Hi Guys,

This is an interesting topic and at the same time it has the distinction of NOT being on the exam. In their infinite wisdom, the exam creators graciously decided not to mix String objects in with garbage collection questions.

So, when you're studying up for GC questions, don't worry about the string constant pool! GC questions will use other kinds of objects!

hth,

Bert

[Sandeep Chhabra]

Hi,
Can Same thing be said about

//SAMPLE 1: 
void fn()
{
Integer i = 10;
i= null;
//line 3 
}
 

//SAMPLE 2:
void fn()
{
Integer i = new Integer(10);
i= null;
//line 3 
} 
 

???
[ September 24, 2005: Message edited by: Sandeep Chhabra ]

[Bert Bates]

Hi Sandeep,

This is a valid question to study for the exam! Do you think there is any difference between the two examples when you use wrapper objects?

- Bert