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ubuntu 14.04 java installing using apt-get

there are three ways installing java.
1.default-jre/jdk
2. open-jdk
2. oracle java

1. default jre/jdk

sudo apt-get install default-jre default-jdk

2. openjdk-7-jre/jdk
sudo apt-get install openjdk-7-jre openjdk-7-jdk

3. oracle java

sudo apt-get install python-software-properties
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update

sudo apt-get install oracle-java6-installer
sudo apt-get update

sudo apt-get install -f oracle-java7-installer



sudo apt-get install -f oracle-java8-installer










* switching jdks using update-alternatives between jdks






sudo update-alternatives --config java 





REF

- http://askubuntu.com/questions/163429/error-when-installing-oracle-java7-installer

- http://stackoverflow.com/questions/22541853/oracle-java-7-installation-in-ubuntu-e-sub-process-usr-bin-dpkg-returned-an-er/22955890#22955890












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Jsp 서버 아이피 확인




























한줄버전  <%  String svrIP =  InetAddress.getLocalHost() .getHostAddress();  %>      <%@ page language="java" import="java.net.InetAddress" %>    InetAddress inet = InetAddress.getLocalHost();   String svrIP = inet.getHostAddress();      Reference     http://yoontaesub.egloos.com/m/1925800     




















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cmd 창을 연 후   cd C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin    version.bat  실행  ========================================================  Using CATALINA_BASE:   "C:\Program Files\Apache Software Foundation\Tomcat 8.0"  Using CATALINA_HOME:   "C:\Program Files\Apache Software Foundation\Tomcat 8.0"  Using CATALINA_TMPDIR: "C:\Program Files\Apache Software Foundation\Tomcat 8.0\temp"  Using JRE_HOME:        "C:\Program Files\Java\jdk1.8.0_91"  Using CLASSPATH:       "C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin\bootstrap.jar;C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin\tomcat-juli.jar"  Server version: Apache Tomcat/8.0.33  Server built:   Mar 18 2016 20:31:49 UTC  Server number:  8.0.33.0  OS Name:        Windows Server 2012 R2  OS Version:     6.3  Architecture:   amd64  JVM Version:    1.8.0_91-b14  JVM Vendor:     Oracle Corporation  ...




















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