E: Unable to locate package oracle-java8-installer
121740
Why Oracle discontinued Oracle Java (JDK) Installer PPA?
140793
Problem installing a package
1632
How do I fix a "Failed to download package files" error?
30571
E: Package 'libpng12-0' has no installation candidate [ubuntu 16.10 Gnome]
11671
"Unable to locate package" while trying to install packages with APT
60195
Unable to locate tools.jar
50800
How to install OpenJDK 8 on 14.04 LTS?
95554
Why does the version of Java verified by Oracle differ from the version shown at the command line?
154622
How do I resolve this installation error?
27631
How to install Oracle 11gR2 on Ubuntu 14.04?
41844
Package Install via Market sometimes fails and gives seemingly random error message
73428
setting the correct classpath for compiling and running Java packages?
150104
Unable to download software center from package manager: 404 Not Found
101022
How to install Oracle 18c (Enterprise Edition) on Ubuntu 18.04?
20213
javac1.8 class not found
31828
How can I install Oracle 11g R2?
26436
Find Oracle JDBC driver in Maven repository