Hi Giovanni.
I know this is recommended general practice for Strings, but if you are
using JDK 1.2, wouldn't using HotSpot eliminate the need for hand optimizing
code like this?
-----Original Message-----
From: Giovanni Az�a [mailto:[EMAIL PROTECTED]]
Sent: Monday, August 16, 1999 1:02 PM
To: [EMAIL PROTECTED]
Subject: (SUGGESTION) OutOfMemoryException
Hi,
Avoid concatenating several strings toguether using += (+)
instead use
StringBuffer.append method. This is just an advice to speed
up SERVLETS ...
also avoid unnecessary creation of objects ( NEW ) specially
when processing
requests because JVMs can allocate in the heap JUST ONE
OBJECT at the
time!!!
// What I have been doing earlier
String sqlQuery=null;
// a very complex select created dynamically based on user
selected options
sqlQuery+="SELECT ...."
...// LOT OF sqlQuery+=""
the code above when run turns in:
sqlQuery = new StringBuffer().append("SELECT
....").toString();
sqlQuery = new StringBuffer(sqlQuery).append("
....").toString();
// allocating one StringBuffer in the heap for each
concatenation!!!!!!!!!!!!
Instead create just one StringBuffer:
// What I do after I finish reading "JAVA SERVLET
PROGRAMMING"
StringBuffer sqlQuery= new StringBuffer();
String result=null;
sqlQuery.append(" SELECT ....");
sqlQuery.append(" ....");
result= sqlQuery.toString();
I FOUND THE TIP IN THE O'Reilly "JAVA SERVLET PROGRAMMING" a
great book (if
not the best) to get started with servlets...
Giovanni Az�a Garc�a.
Bachelor in Computer Science.
Banking and Economic Information Center
e-mail: [EMAIL PROTECTED]
ICQ# 20725388
Giovanni Az�a Garc�a.
Bachelor in Computer Science.
Banking and Economic Information Center
e-mail: [EMAIL PROTECTED]
ICQ# 20725388
Giovanni Az�a Garc�a.
Bachelor in Computer Science.
Banking and Economic Information Center
e-mail: [EMAIL PROTECTED]
ICQ# 20725388
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