Need Guide To Install Java On Debian/Ubuntu

update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/ControlPanel to provide /usr/bin/ControlPanel (ControlPanel) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/java to provide /usr/bin/java (java) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/java_vm to provide /usr/bin/java_vm (java_vm) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/javaws to provide /usr/bin/javaws (javaws) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/jcontrol to provide /usr/bin/jcontrol (jcontrol) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/keytool to provide /usr/bin/keytool (keytool) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/pack200 to provide /usr/bin/pack200 (pack200) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/policytool to provide /usr/bin/policytool (policytool) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/rmid to provide /usr/bin/rmid (rmid) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/rmiregistry to provide /usr/bin/rmiregistry (rmiregistry) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/unpack200 to provide /usr/bin/unpack200 (unpack200) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/orbd to provide /usr/bin/orbd (orbd) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/servertool to provide /usr/bin/servertool (servertool) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/bin/tnameserv to provide /usr/bin/tnameserv (tnameserv) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/jre/lib/jexec to provide /usr/bin/jexec (jexec) in auto mode.
Could not create the Java virtual machine.
Error occurred during initialization of VM
Could not reserve enough space for object heap
Ignoring error generating classes.jsa
Could not create the Java virtual machine.
Error occurred during initialization of VM
Could not reserve enough space for object heap
Ignoring error generating classes.jsa
Setting up sun-java6-jdk (6.30-2~natty1) ...
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/HtmlConverter to provide /usr/bin/HtmlConverter (HtmlConverter) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/appletviewer to provide /usr/bin/appletviewer (appletviewer) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/apt to provide /usr/bin/apt (apt) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/extcheck to provide /usr/bin/extcheck (extcheck) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/idlj to provide /usr/bin/idlj (idlj) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jar to provide /usr/bin/jar (jar) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jarsigner to provide /usr/bin/jarsigner (jarsigner) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/java-rmi.cgi to provide /usr/bin/java-rmi.cgi (java-rmi.cgi) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/javac to provide /usr/bin/javac (javac) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/javadoc to provide /usr/bin/javadoc (javadoc) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/javah to provide /usr/bin/javah (javah) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/javap to provide /usr/bin/javap (javap) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jconsole to provide /usr/bin/jconsole (jconsole) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jdb to provide /usr/bin/jdb (jdb) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jhat to provide /usr/bin/jhat (jhat) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jinfo to provide /usr/bin/jinfo (jinfo) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jmap to provide /usr/bin/jmap (jmap) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jps to provide /usr/bin/jps (jps) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jrunscript to provide /usr/bin/jrunscript (jrunscript) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jsadebugd to provide /usr/bin/jsadebugd (jsadebugd) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jstack to provide /usr/bin/jstack (jstack) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jstat to provide /usr/bin/jstat (jstat) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/jstatd to provide /usr/bin/jstatd (jstatd) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/native2ascii to provide /usr/bin/native2ascii (native2ascii) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/rmic to provide /usr/bin/rmic (rmic) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/schemagen to provide /usr/bin/schemagen (schemagen) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/serialver to provide /usr/bin/serialver (serialver) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/wsgen to provide /usr/bin/wsgen (wsgen) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/wsimport to provide /usr/bin/wsimport (wsimport) in auto mode.
update-alternatives: using /usr/lib/jvm/java-6-sun/bin/xjc to provide /usr/bin/xjc (xjc) in auto mode.
Errors were encountered while processing:
 oracle-java7-installer
E: Sub-process /usr/bin/dpkg returned an error code (1)