デフォルトのJavaファイルをコンパイルしようとすると、このメッセージが表示されます。
Command 'javac' not found, but can be installed with:
sudo apt install default-jdk (You will have to enable component called 'main')
sudo apt install openjdk-11-jdk-headless (You will have to enable component called 'main')
sudo apt install ecj (You will have to enable component called 'universe')
sudo apt install openjdk-8-jdk-headless (You will have to enable component called 'universe')
java -versionをチェックすると、私がインストールしたものと表示されます。
openjdk version "11.0.5" 2019-10-15
OpenJDK Runtime Environment (build 11.0.5+10-post-Ubuntu-0ubuntu1.118.04)
OpenJDK Server VM (build 11.0.5+10-post-Ubuntu-0ubuntu1.118.04, mixed mode, sharing)
openjdk-8-jdkをダウンロードしようとすると、このメッセージが表示されます。
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
linux-image-generic : Depends: linux-image-4.15.0-74-generic but it is not going to be installed
linux-modules-extra-4.15.0-74-generic : Depends: linux-image-4.15.0-74-generic but it is not going to be installed or
linux-image-unsigned-4.15.0-74-generic but it is not installable
openjdk-8-jdk : Depends: openjdk-8-jre (= 8u242-b08-0ubuntu3~18.04) but it is not going to be installed
Depends: openjdk-8-jdk-headless (= 8u242-b08-0ubuntu3~18.04) but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
破損したインストールを修復しようとすると、次のメッセージが表示されます。
faiq@faiq-desktop:~$ sudo apt --fix-broken install
apt
Usage: apt command [options]
apt help command [options]
Commands:
add-repository - Add entries to apt sources.list
autoclean - Erase old downloaded archive files
autoremove - Remove automatically all unused packages
build - Build binary or source packages from sources
build-dep - Configure build-dependencies for source packages
changelog - View a package's changelog
check - Verify that there are no broken dependencies
clean - Erase downloaded archive files
contains - List packages containing a file
content - List files contained in a package
deb - Install a .deb package
depends - Show raw dependency information for a package
dist-upgrade - Upgrade the system by removing/installing/upgrading packages
download - Download the .deb file for a package
edit-sources - Edit /etc/apt/sources.list with your preferred text editor
dselect-upgrade - Follow dselect selections
full-upgrade - Same as 'dist-upgrade'
held - List all held packages
help - Show help for a command
hold - Hold a package
install - Install/upgrade packages
list - List packages based on package names
policy - Show policy settings
purge - Remove packages and their configuration files
recommends - List missing recommended packages for a particular package
rdepends - Show reverse dependency information for a package
reinstall - Download and (possibly) reinstall a currently installed package
remove - Remove packages
search - Search for a package by name and/or expression
show - Display detailed information about a package
showhold - Same as 'held'
showsrc - Display all the source package records that match the given package name
source - Download source archives
sources - Same as 'edit-sources'
unhold - Unhold a package
update - Download lists of new/upgradable packages
upgrade - Perform a safe upgrade
version - Show the installed version of a package
この問題を解決するにはどうすればよいですか？