[antlr-interest] Antlr-3.2: Expr.g example execution help

[Mukkaysh Srivastav]

Hello,

I did install antlr-3.2 on Linux x86_64 as below -

  I. Antlr-3.2 Installation:

       1.   mkdir antlr

       2. Downloaded source code (antlr source distribution) from *
http://antlr.org/download.html* in above antlr folder/PATH.

       3. Untarred the source distribution using “tar -zvxf
antlr-3.2.tar.gz” and did get -

	antlr-3.2/BUILD.txt	antlr-3.2/antlr3-maven-plugin	antlr-3.2/antlrjar.xml	antlr-3.2/antlrsources.xml	antlr-3.2/gunit	antlr-3.2/gunit-maven-plugin	antlr-3.2/pom.xml	antlr-3.2/runtime	antlr-3.2/tool

        4. mkdir antlr-toolchain

        5. cd antlr-toolchain  (copy antlr-3.2.jar here)

        6. jar -xvf antlr-3.2.jar

     ABOVE COMPLETES INSTALLATION.

II. Running a tutorial Expr.g & Test.java as posted in
http://www.antlr.org/wiki/display/ANTLR3/Expression+evaluator

      1. In top folder of antlr as created above, I create a folder "mkdir
examples" and do copy Expr.g and Test.java here
      2. Perform below -
                        - export
CLASSPATH=/home/mukkaysh/antlr/antlr-toolchain
                        - Copy the grammar example (Expr.g & Test.java) from
*http://www.antlr.org/wiki/display/ANTLR3/Expression+evaluator*
                        - Using command "java org.antlr.Tool Expr.g"
generates Lexer (.java), Parser (.java) & Tokens files.
                        - Using command "javac Test.java ExprLexer.java
ExprParser.java" generates class files. but with below message -

                          -----
                          [user]$ javac Test.java ExprLexer.java
ExprParser.java
                          Note: ExprParser.java uses unchecked or unsafe
operations.
                          Note: Recompile with -Xlint:unchecked for details.
                          -----

            As, uses of -Xlint generates all warnings, did try as below -

                         [user]$ javac Test.java ExprLexer.java
ExprParser.java -Xlint
                         ExprParser.java:179: warning: [unchecked] unchecked
call to put(K,V) as a member of the raw type java.util.HashMap
                          memory.put((ID2!=null?ID2.getText():null), new
Integer(expr3));
                              ^
                         1 warning
                   ----
I believe this warnings are not so important, but when I do -

                   ----
                  [user]$ ls
                  Expr.g  ExprLexer.class  ExprLexer.java  ExprParser.class
ExprParser.java  Expr.tokens  Test.class  Test.java

                  [user]$ java Test
                  Exception in thread "main" java.lang.NoClassDefFoundError:
Test
                  Caused by: java.lang.ClassNotFoundException: Test
                  at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
                  at java.security.AccessController.doPrivileged(Native
Method)
                  at
java.net.URLClassLoader.findClass(URLClassLoader.java:205)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
                  at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
                  at
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
                  Could not find the main class: Test. Program will exit.
                  -----

I get above execution error messages.

I am totally newbie to ANTLR and Java. Any clue for above warnings and final
execution of Test file.

~BR
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