Difference b/w jdk 1.1 and 1.2 1 Answer(s) 4 years and 6 months ago
Posted in : Development process
December 23, 2008 at 4:34 AM
Changes to CLASSPATH and -classpath
The class path has a default value and can be set by -classpath or CLASSPATH. In 1.1, it worked as follows:
* Class path default - The default value of the class path was (1) the path where Java platform classes resided (classes.zip or rt.jar), and (2) the current working directory (".", read as "dot"). * CLASSPATH - If the environment variable CLASSPATH was set, then the class path would (1) continue to contain classes.zip or rt.jar just the like default plus (2) the newly set value instead of the current working directory. [See Note 1] * -classpath - If the option -classpath <path> was used, then <path> had to explicitly contain both (1) classes.zip or rt.jar and (2) application classes.
This behavior for -classpath was unfortunate because it meant users had to spell out the path to classes.zip:
We say unfortunate because this is inherently error-prone; the onus is on the user to ensure that the java command and the classes.zip were from the same JDK version. We ourselves have spent time debugging problems where a 1.1.4 java was trying to run 1.1.3 classes.zip, and this does not work because the native methods do not match.
The good news is that the -classpath option in 1.2 has taken on the same meaning as the CLASSPATH environment variable in 1.2, so you can now conveniently omit having to spell out the path to Java platform classes:
C:> java -classpath C:\app\classes Application
Some developers like to temporarily modify individual Java platform classes such as java\util\Vector.class, for purposes such as adding println statements to understand how the class works. In 1.2, these users would not be able to use the -classpath option to set the path to Java platform classes, as was possible in 1.1. For such uses, the -Xbootclasspath option must be used in 1.2.
Note 1 - Contrary to the bulleted statement above, we have seen users explicitly placing the path to classes.zip in their CLASSPATH environment variable, though this was not at all required.
New Class Search Paths
The earlier section showed that in JDK1.1, there was one search path used to find classes; its value could be set either through the -classpath option or the CLASSPATH environment variable.
In JDK 1.2, there are three search paths that are used to find classes:
1. The first place where java looks for classes is the bootstrap classpath. The value of this path can be examined by calling System.getProperty("sun.boot.class.path"). Note that the prefix "sun." shows that, at least for now, this property is specific to Sun's implementation. 2. The second place where java looks for classes is the extension directories. The list of directories can be examined by calling System.getProperty("java.ext.dirs"). 3. The third and last place where java looks for classes is the application classpath. The value of this path can be examined by calling System.getProperty("java.class.path").
For a discussion of the new "extension directories" feature mentioned in item 2, refer to javac and The Extensions Framework documentation.
In 1.2, the argument you specify with the -classpath option is the value of the application classpath; it should contain the path to classes that constitute your application. The bootstrap classpath contains the path to Java platform classes that are contained in a file named rt.jar. This is discussed in the next section.
Difference b/w jdk 1.1 and 1.2 - Development process Differenceb/wjdk1.1 and 1.2 Can you plz specify the changes/developments that have taken place from JDK1.1 to JDK1.2 and which version... the -classpath option or the CLASSPATH environment variable.
difference b/w == and equals() differenceb/w == and equals() what is the difference between == operator and equals()
The == operator checks if the two objects were actually the same object. This operator looks at the actually memory
difference b/w viewdidload and ViewWillAppear differenceb/w viewdidload and ViewWillAppear hello all,
what is the differenceb/w viewdidload and ViewWillAppear ???
when view is loaded then this method run one time
but ViewWillAppear run whenever
diff b/w applet and servlet
diff b/w applet and servlet what is the difference between applet and servlet?
Difference between servlet and applet:
1)An applet is client side programming whereas servlet is server side programming.
what is difference b/w oracle 8i, 9i and 10g
what is differenceb/w oracle 8i, 9i and 10g what are the difference between oracle 8i,9i and 10g?
I am not considering the versions and their supported os, in the interview point of view
Diff b/w servlet n jsp - Java Interview Questions
Diff b/w servlet n jsp hii
i want to know the difference between servlet and jsp. please give me the details to understand them in correct.
thanks in advance Nothing my friend. Both are same.
difference differenceb/w java and asp.net
Underscore b/w consecutive capatalized words
Underscore b/w consecutive capatalized words I have a text something like this "25km from N of Rio Negro"
I want to add underscore between consecutive Capatalized words having space between them.
Can some one give me
REQ for connection b/w jdbc and oracle database
REQ for connection b/w jdbc and oracle database REQ for connection b/w jdbc and oracle database
The Java classes to connect....
b) If you are using oracle thin driver,you have to use:
What is the difference between a JDK and a JVM?
What is the difference between a JDK and a JVM? Hi,
What is the difference between a JDK and a JVM?
JDK is stand... to compile your source files using a JVM.
For more difference between JDK and JVM
Difference What Is the difference between JDK & SDK
jse and jdk
jse and jdk SIR PLEASE TELL ME WHAT IS THE DIFFERENCE BETWEEN JDK AND JSE
jdk 1.6 vs jdk 1.7 jdk 1.6 vs jdk 1.7 What is the difference between jdk 1.6 and 1.7 ?? Package structure and all??
Difference between jdk 1.6 and jdk 1.7.... Java DB is based on the open-source Apache Derby and is supported by Sun.
Invoke EJB 1.1 through Web Services - WebSevices
Invoke EJB 1.1 through Web Services I want to know how to invoke remote method in EJB 1.1 through WebServices in OC4J server i.e (9.0.4). I am using Eclipse 3.5 and JDK 1.3.
Please help. It is very critical and urgent.
Struts 1.2 Vs Struts 2.0 - Struts
Struts 1.2 Vs Struts 2.0
Hi, Can u give difference between struts 1.2 and struts 2.0 . Thanks prakash Hi Friend,
Please visit the following link:
jdk which is the latest version of jdk and how can i get it to develope applications?
JDK 7 is the latest version. You can download jdk 7 from the given link:
Download JDK 7
Installing JSF 1.1 in TOMCAT 5.5.23
The steps required...Installing JSF 1.1 in TOMCAT 5.5.23
... installation of
JSF 1.1 to TOMCAT 5.5.23. Java Server Faces (JSF) requires some
... have less or
no impact on other component.
Download JDK 1.4 or above from sun site. Follow the instruction
Java Tutorials - JDK Tutorials, JAVA Examples, JDK Examples
under the terms of the GNU Free Documentation License, Version 1.1..., which covered Java 1.1, can be found at
http://math.hws.edu/eck/cs124/javanotes3... requires Java 1.1, is still available at:
Difference between http and https Difference between http and https Differenceb/w HTTP and HTTPS
please provide answer in tabular form.
1)HTTP is hyper text transfer protocol which is responsible for transmitting
tabs and struts 1.1 - Struts
tabs and struts 1.1 Hi, i've some questions in developing tabs on struts1.1; what is the best solution, using ajax libraries or using struts layout?? does Struts layout exist on struts 1.1? thanks Syham
difference difference between hashtable and hashtree
difference what's the difference between mysql and sql
difference difference what is the difference between the JDBC-ODBC bridge, the Native-API-Partly-Java driver, and the JDBC-Net-All-Java Driver is the placement of the database access libraries
Please visit the following link
Jdk 1.7 Jdk 1.7 How many class and packages are avilable in latest jdk 1.7 version
difference difference between thread and process in java
Difference between Process and Thread:
1)Process is a program under execution whereas Thread is a part of program.
2)Process are heavy weight programs which
difference difference between Method Overloading and method Overriding
Difference between Method Overloading and Method Overriding:
Overriding is the concept of having functions of same name and signature
JSF 1.2 online tutorial
JSF 1.2 online tutorial Need a perfect online tutorial for JSF 1.2..
Thanks in advance
Please visit the following link:
Doubts on Struts 1.2 - Struts
Doubts on Struts 1.2 Hi,
I am working in Struts 1.2. My requirement is to display data in a multiple selected box from database in a JSP page.
Can anyone suggest me how to proceed...
Thanx in advance Hi friend
Feather Ajax 1.1
Feather Ajax 1.1
Are you wanting to jump on the ajax bandwagon, but you don't want to
sacrifice your load time? I've created an easy-to-use ajax library that is less
than 1KB. I'll
It Supports Struts 1.1, 1.2 and JSTL.
Fully Support for Struts 1.1 and 1.2, Tiles (Tiles
defination editor is ongoing).
dynamicaly change URL in struts 1.2
dynamicaly change URL in struts 1.2 I need to change the url dynamically on particular button click.
exactly same what this URL is showing, instead
Java Programming: Section 1.1
The Fetch and Execute Cycle: Machine Language
A COMPUTER IS A COMPLEX SYSTEM consisting
of many different components. But at the heart -- or the brain,
if you want -- of the computer is a single component
Difference between JSP 2.0 & JSP 2.1 Difference between JSP 2.0 & JSP 2.1
... is released with new promises. JSP 2.0 is a
upgrade version of JSP 1.2 with several.... Earlier the version 1.0 of jsf technology depended
on jsp 1.2 technology