Is java a compiled language - part 2

yamm_v6.6_6 said
Again, I think you are confusing the compilation process and the interpretation process with the meaning of "compiled language" and "interpreted language", mr. jschell. Compilation process and interpretation process have definitions very well established in the Computer Science, as you said, and I agree with you. There are no controversies in those definitions. On the other hand, the meaning of "compiled language" and "interpreted language" might vary, because in this case there are controversiesNo.
Compilers are one of the most well studied and well defined aspects of computer science more so than any other part of computer science.
And the Dragon book is now, and has been for at least 20 years, the recognized authoratative source of that part of computer science.
And there is nothing in there that supports your conclusion nor nothing that supports your term definitions.
A language in of itself is never compiled nor interpreted. That book specifically defines the process under which a language must be processed to become either compiled and/or interpreted.
If you wish to disagree with that then state something from that book or first demonstrate that that book is no longer the authorative source.
Finally note that in terms of computer science none of the java documents (specifications or otherwise) are suitable authoratative sources. The java specifications although adequate are far from precise in the adherence to definitions in computer science, or even in the definition of java itself.

Wow! I was just googling, and then look at what I found! This thread! Thanks, mr jschell, for your replies. I really appreciate them.
jschell wrote:
Finally note that in terms of computer science none of the java documents (specifications or otherwise) are suitable authoratative sources. The java specifications although adequate are far from precise in the adherence to definitions in computer science, or even in the definition of java itself.Well, do you want authoritative sources, right? How about this:
[_CLDC HotSpot Implementation Architecture Guide Chapter 10_|http://java.sun.com/javame/reference/docs/cldc-hi-2.0-web/doc[_CLDC HotSpot Implementation Architecture Guide Chapter 10_|http://java.sun.com/javame/reference/docs/cldc-hi-2.0-web/doc/architecture/html/VFP.html]
+The 1.1.3 release of CLDC HotSpot Implementation included limited VFP support. This feature was supported only when running in interpreted mode. In this release, full vector floating point support is provided when the virtual machine is running in compiled mode.+
[_Java Virtual Machines_|http://java.sun.com/j2se/1.4.2/docs/guide/vm/index.html]
+Adaptive compiler - Applications are launched using a standard interpreter, but the code is then analyzed as it runs to detect performance bottlenecks, or "hot spots". The Java HotSpot VMs compile those performance-critical portions of the code for a boost in performance, while avoiding unnecessary compilation of seldom-used code (most of the program). The Java HotSpot VMs also usesthe adaptive compiler to decide, on the fly, how best to optimize compiled code with techniques such as in-lining. The runtime analysis performed by the compiler allows it to eliminate guesswork in determining which optimizations will yield the largest performance benefit.+
[_CLDC HotSpot Implementation Architecture Guide Chapter 4_|http://java.sun.com/javame/reference/docs/cldc-hi-2.0-web/doc/architecture/html/DynamicCompiler.html]
+Two different compilers are contained in the CLDC HotSpot Implementation virtual machine: an adaptive, just-in-time (JIT) compiler and an ahead-of-time compiler. The JIT compiler is an adaptive compiler, because it uses data gathered at runtime to decide which methods to compile. Only the methods that execute most frequently are compiled. The other methods are interpreted by the virtual machine.+
[_Java Tuning White Paper_|http://java.sun.com/performance/reference/whitepapers/tuning.html]
+One of the reasons that it's challenging to measure Java performance is that it changes over time. At startup, the JVM typically spends some time "warming up". Depending on the JVM implementation, it may spend some time in interpreted mode while it is profiled to find the 'hot' methods. When a method gets sufficiently hot, it may be compiled and optimized into native code.+
[_Frequently Asked Questions About the Java HotSpot VM_|http://java.sun.com/docs/hotspot/HotSpotFAQ.html]
+Remember how HotSpot works. It starts by running your program with an interpreter. When it discovers that some method is "hot" -- that is, executed a lot, either because it is called a lot or because it contains loops that loop a lot -- it sends that method off to be compiled. After that one of two things will happen, either the next time the method is called the compiled version will be invoked (instead of the interpreted version) or the currently long running loop will be replaced, while still running, with the compiled method. The latter is known as "on stack replacement", or OSR.+
[_Java Technology Fundamentals Newsletter Index - Making Sense of the Java Classes & Tools: Collection Interfaces, What's New in the Java SE 6 Platform Beta 2, and More_|http://java.sun.com/mailers/newsletters/fundamentals/2006/July06.html]
+Java: A simple, object-oriented, network-savvy, interpreted, robust, secure, architecture neutral, portable, high- performance, multithreaded, dynamic language.+

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Is this right anyone got a definitive answer?
Cheers

Im confused all languages aare compiled arent they?Languages are not classified into compiled and interpreted. Implementations of languages are either compilers or interpreters.
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Clancy wrote:
> I have written several utilities for my album program in
php, but this means
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php before they can use
> them on their own computers.
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2) Having issue getting ant to compile code properly. In the compile
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classpath="$(lib.home)"
debug="on" optimize="on" deprecation="off"/>
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well as if I use *.* and so on. if I list the explicit file names, it still
doesn't seem to find them.
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know, I can send the entire build.xml if necessary. I may be missing
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off the wall. Hopefully get some clarification and understanding.
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Kevin Price wrote:
Hello.
I am new to working with WAR files and the whole process of it. A little
background on what we are using. We are using, WLS 6.1 SP3. I am using the
ant.bat that is supplied in the bin directory of the WLS install.
I am trying to work with ANT and getting it to build the file. I am making
progress, but at a point where I am having trouble getting my java code
files to compile using ant. I am having one issue and looking to do one
other item.
1) I would like to precompile the JSPs if possible prior to putting into the
WAR file. Not sure if this is done or not, but there was a utility when I
was working with ibm's app server that gave us the ability to do a batch
complile. Was thinking that maybe a similair concept is possibly here.you can use weblogic.jspc
http://e-docs.bea.com/wls/docs70/jsp/reference.html#57794
or just set the precompile flag in weblogic.xml
You can configure WebLogic Server to precompile your JSPs when a Web
Application is deployed or re-deployed or when WebLogic Server starts up
by setting the precompile parameter to true in the <jsp-descriptor>
element of the weblogic.xml deployment descriptor.
>
2) Having issue getting ant to compile code properly. In the compile
section of the build.xml file for ant, I tell it where the source files are,
and the destionation folder for the compiled class files. I then try to set
the classpath so that it finds the .jar files that are necessary for my
source files to complile. But, it won't find them. And not sure how come.
I may be going about this all wrong, but dont know. Here is the compile
section of the build.xml I am using:
<target name="compile" depends="prepare">
<javac srcdir="classes" destdir="${deploy.home}/WEB-INF/classes"
classpath="$(lib.home)"
debug="on" optimize="on" deprecation="off"/>
</target>
maybe because you are not using curly braces there on lib.home??
if you do it the way above, you would have to list all your jars
classpath="$(lib.home)\lib1.jar:$(lib.home)\lib2.jar"
or you can nest
<javac srcdir="classes" destdir="${deploy.home}/WEB-INF/classes"
debug="on" optimize="on" deprecation="off">
     <classpath>
          <fileset dir="${lib.home}" includes="*.jar" />
     </classpath>
</javac>
One note, I've tried many different items in the classpath line, which
don't work. if I do *.jar it fails at complie time, invalid argument. As
well as if I use *.* and so on. if I list the explicit file names, it still
doesn't seem to find them.
I was wondering if anyone could help, if you need anymore information let me
know, I can send the entire build.xml if necessary. I may be missing
items, seeing that this is my first try at using ANT.
Any help is appreciated and thanks in advance. Hopefully not sounding too
off the wall. Hopefully get some clarification and understanding.
Thank you.
Kevin.

User defined java function-compilation error! Activation cancelled

Hi all!
I have written an User defined Function in java for converting XML to PDF which is available at this blog:
/people/divya.vidyanandanprabhu/blog/2005/06/28/converting-xml-to-pdf-using-xi
I added both dom4j-1.6.1.jar and itext-1.4.1.jar files in (XIserver machine)D:/usr/sap/....server0/bin.
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Activation of the change list canceled Check result for Message Mapping test | http://httpadp.com/send: Starting compilation Source code has syntax error: D:/usr/sap/QN7/DVEBMGS00/j2ee/cluster/server0/./temp/classpath_resolver/Map7bf962e0f21411daae8a00111120e6db/source/com/sap/xi/tf/_test_.java:3: package com.xml2pdf does not exist import com.sap.aii.mappingtool.tf3.;import com.sap.aii.mappingtool.tf3.rt.;import java.util.;import java.io.; import java.lang.reflect.*;import com.xml2pdf.XmlToPdf; ^ D:/usr/sap/QN7/DVEBMGS00/j2ee/cluster/server0/./temp/classpath_resolver/Map7bf962e0f21411daae8a00111120e6db/source/com/sap/xi/tf/_test_.java:51: cannot resolve symbol symbol : class XmlToPdf location: class com.sap.xi.tf._test_ XmlToPdf x = new XmlToPdf("D:
qf
source
Input.xml", "D:
qf
target
Output.pdf"); ^ D:/usr/sap/QN7/DVEBMGS00/j2ee/cluster/server0/./temp/classpath_resolver/Map7bf962e0f21411daae8a00111120e6db/source/com/sap/xi/tf/_test_.java:51: cannot resolve symbol symbol : class XmlToPdf location: class com.sap.xi.tf._test_ XmlToPdf x = new XmlToPdf("D:
qf
source
Input.xml", "D:
qf
target
Output.pdf");

Hi
My java program is:
import com.xml2pdf.XmlToPdf;
public String testing(String a,String b,String c,Container container){
XmlToPdf x = new XmlToPdf("D:
qf
source
Input.xml", "D:
qf
target
Output.pdf");
x.Convet();
return "";
Can you please figureout any errors in my prg.
I have imported the 2(itext-1.4.1 and dom4j-1.6.1) jars into Imported Archives in my scenario in IR.
I placed these jars in D:/usr/sap/..../server0/bin
also. I followed the blog thoroughly and carefully.
Thanks a lot for your suggestion.

Is java a compiled language - part 2

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