Doubt about string.intern()

Hello
I have a doubt about string.intern() method.
The document says
When the intern method is invoked, if the pool already contains a string equal to this String object as determined by the String.equals(Object) method, then the string from the pool is returned.
So what is the point of using this intern() method with == or != operators if it aleady calling to equals method internally?
eg:
if (studentObject.getName().intern() == "Student Name") {}cannot be better than
if (studentObject.getName().equals("Student Name")) {}Can someone please explain?

Easy dude.
>
Why do you need to optimize it?>
Because i want to.
I would avoid the whole stupid 100 line if-else by doing a Map of type->object and then just clone() the object. But maybe that might not be suitable or "fast enough" for you.I cannot do above because object have it's own behaviors varying at run time
eg - class One has setOne method and class hundred has setHundred method
. Even if i use a map and clone it again i have to use above comparison for setting those behaviours.
Explain your actual problem you're trying to solve, with actual cases. What are these "one" and "Hundred" classes really? Or is your project so top secret that you can't tell us?It is not secret but big. And I need to make the question understandable. If I post the whole code no one will looking at it.
Now you asking so please have a look.
still I have cleaned up many.
My initial question was how to bit speed up the comparison? And can't i use intern() Because here if I got plenty of rectangles(it is the last) performace sucks.
for (CObject aObject : objList) {
            if (aObject.getType().equals(SConstant.TEMPLATE)) { /* process Template */
                Template tObj = (Template) aObject;
                org.apache.velocity.Template template = VelocityTemplateManager.getInstance().getObjectTemplateFromFile(retemplateProperties.getProperty("PAGE"));
                VelocityContext context = new VelocityContext();
                StringWriter writer = new StringWriter();
                context.put(retemplateProperties.getProperty("BAND_OBJECT"), dtmBand);
                tObj.setTags(writer.toString());
            } else if (aObject.getType().equals(SConstant.LINE)
                    && !isInBandandBandAutoAdjust(aObject)) {
                Line object = (Line) aObject;
                org.apache.velocity.Template template = VelocityTemplateManager.getInstance().getObjectTemplateFromFile(retemplateProperties.getProperty("LINE"));
                VelocityContext context = new VelocityContext();
                StringWriter writer = new StringWriter();
                updateContextWithCheckShifting(context, object);
                context.put(retemplateProperties.getProperty("LINE_OBJECT"), object);
                template.merge(context, writer);
                object.setTags(writer.toString());
            } else if (aObject.getType().equals(SConstant.IMAGE) /* process Image */
                    && !isInBandandBandAutoAdjust(aObject)) {
                REImage imageObject = (REImage) aObject;
                org.apache.velocity.Template template = VelocityTemplateManager.getInstance().getObjectTemplateFromFile(retemplateProperties.getProperty("IMAGE"));
                VelocityContext context = new VelocityContext();
                updateContextWithCheckShifting(context, imageObject);
                context.put(retemplateProperties.getProperty("IMAGE_OBJECT"), imageObject);
                mageObject.setTags(writer.toString());
               else if (aObject.getType().equals(SConstant.RECTANGLE) /* process Rectangle */
                    && !isInBandandBandAutoAdjust(aObject)) {
                Rectangle rectangleObject = (Rectangle) aObject;
                org.apache.velocity.Template template = VelocityTemplateManager.getInstance().getObjectTemplateFromFile(retemplateProperties.getProperty("RECTANGLE"));
                VelocityContext context = new VelocityContext();
                StringWriter writer = new StringWriter();
                updateContextWithCheckShifting(context, rectangleObject);
                context.put(retemplateProperties.getProperty("RECTANGLE_OBJECT"), rectangleObject);
                template.merge(context, writer);
                rectangleObject.setTags(writer.toString());
            }And masijade
Thank you very much for the better explanation.

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hi all, my native language is not english, and i have a problem when reading the java doc of String.intern() method. the following text is extract from the documentation:
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kajbj wrote:
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cssl wrote:
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Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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I have some doubts about the possible uses of OBIEE. It happens that using OBIEE sometimes users demand report of an "analytical" type, that is aggregated analysis through OBIEE’s Answers, selecting data from dimension tables and measures from fact tables. That’s the ordinary purpose of business intelligence tools!!!
Some other times though, users demand to perform through Answers analyses of an "operating" type, that is simple extractions of some fields belonging to dimension tables, linked between each other through joins, (hence without querying fact tables): that happens because some of the tables brought in the datawarehouse are not directly linked to any fact table. In this way users want to use Answers to visualize data even for this kind of extractions (or operating reports).
Is this a correct use of the tool or is it just a “twisted” way of using it, always leading eventually to incorrect extractions? If that’s the case, is it possible to use instead BI Publisher, extracting the dataset through the "Sql Query" mode in a visual manner? The problem of the latter solution, in my case, relies in the fact that users are not enough skilled from the technical point of view: they would prefer to use Answers for every extraction, belonging both to the first type (aggregations) and the second one (extractions), that I just described. Can you suggest a methodology to clarify this situation?

Hi,
I understand your point... But I think OBIEE doesn't allow having dimension "on their own", they must be joined to a fact table somehow. This way, when you do a query in answers using fields of two dimension tables a fact table should be always involved. When dimensions are conformed, several fact tables may be used, and OBIEE uses the "best" one in terms of performance. However, there are some tricks that you can do to make sure a particular fact table is used, like using the "implicit fact column" in the presentation layer.
So back to your point, using OBIEE for "operational" reporting as you call it is a valid option in my experience, but you have to make sure that the underlaying star schema supports the logic that your end users expect when they use just dimension fields.
Regards,

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