install_jdk

1、查看可用JDK：apt-cache search jdk
libpg-java - Java database (JDBC) driver for PostgreSQL
free-java-sdk - Complete Java SDK environment consisting of free Java tools
icedtea-java7-bin - Java runtime based on OpenJDK
icedtea-java7-demo - Java runtime based on OpenJDK
icedtea-java7-doc - Icedtea Development Kit (JDK) documentation
icedtea-java7-jdk - Java runtime based on OpenJDK
icedtea-java7-jre - Java runtime based on OpenJDK
icedtea-java7-plugin - Java plugin based on OpenJDK and gcjwebplugin
icedtea-java7-source - Icedtea Development Kit (JDK) source files
japitools - Java API compatibility testing tools
kaffe - A JVM to run Java bytecode
libcommons-lang-java - Extension of the java.lang package
libcommons-launcher-java - cross platform java application launcher
libicu4j-java - Library for unicode support and internalisation
libitext-java - Java Library to generate PDF on the Fly
librxtx-java - Full Java CommAPI implementation
mmake - Makefile generator for Java programs
usepackage - utility to manage environment variables from within dotfiles
jde - JDEE, Java Development Environment for Emacs(en)
sun-java5-bin - Sun Java(TM) Runtime Environment (JRE) 5.0 (architecture dependent files)
sun-java5-demo - Sun Java(TM) Development Kit (JDK) 5.0 demos and examples
sun-java5-doc - Sun JDK(TM) Documention -- integration installer
sun-java5-jdk - Sun Java(TM) Development Kit (JDK) 5.0
sun-java5-jre - Sun Java(TM) Runtime Environment (JRE) 5.0 (architecture independent files)
sun-java5-source - Sun Java(TM) Development Kit (JDK) 5.0 source files
sun-java6-bin - Sun Java(TM) Runtime Environment (JRE) 6 (architecture dependent files)
sun-java6-demo - Sun Java(TM) Development Kit (JDK) 6 demos and examples
sun-java6-doc - Sun JDK(TM) Documention -- integration installer
sun-java6-javadb - Java(TM) DB, Sun Microsystems' distribution of Apache Derby
sun-java6-jdk - Sun Java(TM) Development Kit (JDK) 6
sun-java6-jre - Sun Java(TM) Runtime Environment (JRE) 6 (architecture independent files)
sun-java6-source - Sun Java(TM) Development Kit (JDK) 6 source files
libc6-i686 - GNU C Library: Shared libraries [i686 optimized]

2、選擇安裝：sudo apt-get install sun-java6-jdk

3、JAVA_HOME環境變量設置：
編輯/etc/profile文件
gedit /etc/profile
JAVA_HOME=/usr/lib/java-6-sun
export JAVA_HOME