Install JDK 6 in ubuntu

The manual Installation Method in Ubuntu has many bugs ...... For example, javac and javadoc commands must be manually set ...... In fact, as long as you have a machine that can be connected to the Internet, you can easily install it with apt-getinstall ...... Apt-getinstallsun-java6-jdkupdate-alternatives -- configjavanano/etc/environment add:

The manual Installation Method in Ubuntu has many bugs ...... For example, javac and javadoc commands must be manually set ......

In fact, as long as you have a machine that can be connected to the Internet, you can easily install it with apt-get install ......

Apt-get install sun-java6-jdk

Update-alternatives -- config java

Nano/etc/environment

Add:

CLASSPATH =.:/usr/lib/jvm/java-6-sun/lib

JAVA_HOME =/usr/lib/jvm/java-6-sun

Nano/etc/jvm

Add the row to the top of each item:

/Usr/lib/jvm/java-6-sun

Update-java-alternatives-s java-6-sun