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Questions[java](ubuntu)

Martin Hope
mcExchange
Asked: 2016-03-02 02:05:08 +0800 CST
  • 142

While installing Android Studio on Ubuntu 14.04 I get the message that my Java version (javac 1.7.0_79) is causing problems. I found a solution of how to install a newer Oracle version of Java:

sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

However I'm afraid that this might overwrite my existing open-jdk version of Java. Since I don't know which of my programs depend on Java, I fear that this could crash these other programs.

Is there a way to make sure apt-get doesn't overwrite my previous Java? I would basically like to have installed both and be able to switch between them manually, depending on what version I need.

java
Martin Hope
jaorizabal
Asked: 2012-02-06 17:15:14 +0800 CST
  • 183

I know that to execute a file, I use the . command, then the file name with a space between them. But I'm trying to execute a .jar file using the . and it does not work. I went into the properties and marked it as executable and made it run with Java.

Is there a way to execute a file with Java in the Bash Terminal? I am trying to execute a Minecraft.jar file

I am trying to execute the Minecraft.jar file.

command-line java
Martin Hope
Benjamin
Asked: 2011-08-08 00:04:12 +0800 CST
  • 574

I want to install Oracle's JRE and to update to the latest version with the Software Updater when they released. Is there a Ubuntu package that is provided by Canonical or Oracle?

Before release Java 7, I followed this way to install Java 6.

But it doesn't work for Java 7. There is no package sun-java7-xxx. How can you install Java 7?

java