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garbage collection

 
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Hi,

class Garbage
{
public static void main(String args[])
{
StringBuffer s1=new StringBuffer("hello");
StringBuffer s2=new StringBuffer("goodbye");
System.out.println(s1);
s1=s2;
}
}
in this pgm first we r printing s1 value.after we are assigning s2 value to s1.my doubt is after assgining the s2 value to s1 it is eligible for garbage collection r after making s1 to null.

suhita
 
Suhita Reddy
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how many objects r garbage collected?ans is 1.i can't understood how answer is one.


public class X {
2. public static void main(String [] args) {
3. X x = new X();
4. X x2 = m1(x);
5. X x4 = new X();
6. x2 = x4;
7. doComplexStuff();
8. }
9. static X m1(X mx) {
10. mx = new X();
11. return mx;
12. }
13. }
 
lowercase baba
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Please read this. you're much more likely to get help if your posts contain real words, and not things like "plz" and "r".
 
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Please read this. you're much more likely to get help if your posts contain real words, and not things like "plz" and "r".



Well said.

in this pgm first we r printing s1 value.after we are assigning s2 value to s1.my doubt is after assgining the s2 value to s1 it is eligible for garbage collection r after making s1 to null.



Yes. Object referenced by s1 will be eligible for Garbage Collection after the assignment.


how many objects r garbage collected?ans is 1.i can't understood how answer is one.


public class X {
2. public static void main(String [] args) {
3. X x = new X();
4. X x2 = m1(x);
5. X x4 = new X();
6. x2 = x4;
7. doComplexStuff();
8. }
9. static X m1(X mx) {
10. mx = new X();
11. return mx;
12. }
13. }



Only the object referenced by x2 will be garbage collected, since it has no reference to it after the x2=x4 statement.
 
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