Comments for Deep into Java

Comment on Playing around with exception stack traces by Deepak Anupalli

Deepak Anupalli — Fri, 04 Sep 2009 04:09:06 +0000

Thanks Bill.

Comment on Playing around with exception stack traces by Bill Bartmann

Bill Bartmann — Fri, 04 Sep 2009 01:10:18 +0000

Cool site, love the info.

Comment on Type Safe Enumerations in Java 5.0 by Allaa

Allaa — Tue, 07 Apr 2009 20:42:09 +0000

Very good and comprehensive article

Comment on Understanding Generics with Collections by Kiran

Kiran — Sat, 21 Mar 2009 07:04:31 +0000

Very Good Article.

Comment on Bootstrapping static fields within enums by Enum and other Java 5 tricks …

Enum and other Java 5 tricks … — Sun, 01 Feb 2009 09:54:47 +0000

[...] Deepak has finally started blogging at Deep into Java. He has been sharing some neat tricks like Bootstrapping static fields within enums. [...]

Comment on Bootstrapping static fields within enums by Deepak Anupalli

Deepak Anupalli — Fri, 16 Jan 2009 10:56:06 +0000

Hi,

This is an interesting case, where you can access a static field while the Enum instance is being constructed though not directly through the constructor.

I tried to compile this piece of code on JDK 1.5 and 1.6 and found that it works perfectly fine with 1.5 and compilation fails with 1.6. Probably, you are trying to compile with 1.6.

Looks like they have got away with this in JDK 1.5 and fixed it in 1.6. Otherwise, this case would have been an anomaly to my post . Thanks for the use-case.

Comment on Bootstrapping static fields within enums by snow

snow — Thu, 15 Jan 2009 14:57:33 +0000

Hello, I have found your article and I was hoping you may be able to explain what the problem is in the piece of code that will follow if there is one, because I am the only one in my team that gets it. Is it a Java problem or some Eclipse problem/setting.
Thanks for your help.

public enum MyClass {
// …
private static int nextIndex = 0;
private final int index = MyClass.nextIndex++;
/*only I get the error “Cannot refer to the static enum field MyClass.nextIndex within an initializer”*/
// …
}

Comment on Type Safe Enumerations in Java 5.0 by free online christmas game

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Comment on Understanding Generics with Collections by Deepika

Deepika — Mon, 10 Nov 2008 06:15:25 +0000

hey nice article…

Comment on Bootstrapping static fields within enums by Benedetto

Benedetto — Fri, 01 Aug 2008 19:01:05 +0000

to Benita: Yes, i missed that part of the article was right about static fields not being accessible from the enum initializer.
Anyway you can still avoid the static for each bootstrap and let each enum constant to cache itself at initialization time by moving the cache into a static method that will also instantiate the cache:
…
private static Map getCache(){
if (cache==null)
cache=new LinkedHashMap();
return cache;
}

private Tag(int recordNo, int datasetNo, boolean isRepeat){
//initialize statics–
//–
this.recordNo = recordNo;
this.datasetNo = datasetNo;
this.isRepeat = isRepeat;
getCache().put(this.getRecordNo()<<8 + this.getDatasetNo(), this);
}

…