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Full Discussion: Classpath of JAVA
Top Forums Programming Classpath of JAVA Post 302755071 by yifangt on Friday 11th of January 2013 05:50:37 PM
Old 01-11-2013
Classpath of JAVA

Hello,
ABC question as I could not get a direct answer: How to locate the default IO class of JAVA? My question was triggered by the row in most java program
Code:
import java.io.*

as I am very curious where the io class is located in my Mint14 (Ubuntu12.10). I am aware it is similar to use DBI in PERL, or #include <stream> in C++, where I could locate the packages/libraries in certain directories:
Code:
/usr/lib/perl5/DBI.pm
/usr/include/c++/4.7/iostream

but I could not locate any file name (io.class, or io.jre) for this io class in java? Have checked my system for the libraries:
Code:
/usr/lib/jvm/java-7-openjdk-amd64/lib/
/usr/lib/jvm/java-7-openjdk-common/jre/lib/
/home/kevin/downloadsoftware/jre1.7.0_10/lib/
/usr/lib/eclipse/plugins/

Also checked Oracle website, where there is:
Code:
package java.io

but I could not find this file in my system, and the java program works fine. Can anybody give me some explanantion about the "default IO, file, string, date & time, etc classes" of java1.7.x when it was installed. My java is:
Code:
$java -version
java version "1.7.0_09"
OpenJDK Runtime Environment (IcedTea7 2.3.3) (7u9-2.3.3-0ubuntu1~12.10.1)
OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)

Thanks a lot!
 

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MAVEN(1)							   User Commands							  MAVEN(1)

NAME
Maven - Creates a link in /usr/share/maven-repo for an existing jar. SYNOPSIS
mh_linkjar [option]... [pom] [dest_jar] [link]... DESCRIPTION
Create symlinks for a jar installed by other means. The symlinks created include links to the jar in /usr/share/maven-repo, at the correct location for Maven. It can also create additional links to the jar, usually located in /usr/share/java. Where [pom] is the location of the POM associated with the jar to install. GroupId, artifactId and version will be extracted from this file. [dest_jar] is the path of the installed jar, usually located in the usr/share/java folder. [link] is an additional link to the jar to install, usually there should be a link to usr/share/java/$jar.jar and usr/share/java/$jar-$version.jar to comply with the Java packaging guidelines. Note that there is no need to specify those particular links if the --java-lib option is used. OPTIONS
-h --help: show this text -V --version: show the version -p<package> --package=<package>: name of the Debian package which will contain this jar file -e<version>, --set-version=<version>: set the version for the jar, do not use the version declared in the POM file. -r<rules> --rules=<rules>: path to the file containing the rules to apply when cleaning the POM. Optional, the default location is debian/maven.rules Maven rules are used here to extract the groupId, artifactId and version from the POM file. -l --java-lib: Optional, if given it will install the jar into /usr/share/java to comply with the Debian Java specification. The jar will be installed as /usr/share/java/$name-$version.jar and a versionless link /usr/share/java/$name.jar will point to it, as well as the links installed in /usr/share/maven-repo -n<name> --usj-name=<name>: Optional, the name to use when installing the library in /usr/share/java when --java-lib is used. Defaults to the artifact id found in the POM. -j<version> --usj-version=<version>: Optional, the version to use when installing the library in /usr/share/java when --java-lib is used. Defaults to the version found in the POM. -s --no-usj-versionless: Optional, don't install the versionless link in /usr/share/java. This flag is used only when the -l or --java-lib option is given. -c<classifier> --classifier=<classifier>: Optional, the classifier for the jar. Empty by default. -v --verbose: show more information while running -n --no-act: don't actually do anything, just print the results --skip-clean-pom: don't clean the pom, assume that a previous action ran mh_cleanpom with the correct options. mh_cleanpom is run only to extract the groupId, artifactId and version of the jar Maven Repo Helper version 1.7.1 January 2012 MAVEN(1)
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