Ubuntu javac已包含在下列文件中问题解决

问题:
jalen_chu@jalen:~$ javac

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
程序 'javac' 已包含在下列软件包中:
default-jdk
ecj
gcj-4.8-jdk
openjdk-7-jdk
gcj-4.6-jdk
openjdk-6-jdk
请尝试:sudo apt-get install <选定的软件包>

(Java -version同上)

方案:
输入:$ sudo update-alternatives –install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_75/bin/javac 300
返回:update-alternatives: using /usr/lib/jvm/jdk1.7.0_75/bin/javac to provide /usr/bin/javac (javac) in 自动模式
javac

输入:$ sudo update-alternatives –install /usr/bin/Java java /usr/lib/jvm/jdk1.7.0_75/bin/java 300
返回:update-alternatives: using /usr/lib/jvm/jdk1.7.0_75/bin/java to provide /usr/bin/java (java) in 自动模式
java -version