我正在尝试安装Java 7.我首先测试了我的Java版本,请参阅下面的代码
ubuadmin@ubuserver3:~/JavaJars/HelloWordGPU$ java -version
java version "1.6.0_30"
OpenJDK Runtime Environment (IcedTea6 1.13.1) (6b30-1.13.1-1ubuntu2~0.12.04.1)
OpenJDK Client VM (build 23.25-b01, mixed mode, sharing)
我尝试首先使用以下命令卸载它:
sudo apt-get remove openjdk-6-jdk
它给了我以下结果。
ubuadmin@ubuserver3:~/JavaJars/HelloWordGPU$ sudo apt-get remove openjdk-6-jdk
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package openjdk-6-jdk is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
ubuadmin@ubuserver3:~/JavaJars/HelloWordGPU$
我也尝试使用sudo apt-get remove default-jdk
,但同样。
那我该如何安装Java 7呢?
答案 0 :(得分:1)
从发布的here指示
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
然后您可以使用update-java-alternatives,
sudo update-java-alternatives -l
sudo update-java-alternatives -s <The correct Java 7 JDK>
答案 1 :(得分:1)
您可以通过
直接安装openjdk-7-jdk
apt-get install openjdk-7-jdk
之后,您可以使用update-java-alternatives
将其设置为默认Java
update-java-alternatives -l
update-java-alternatives -s <jname>