最近在Linux上运行java程序出现Unsupported major.minor version 51.0错误,后发现是编译后的java程序与Linux上的java Se版本不一致而产生的错误。提示的版本号与Java se对应表如下:1
2
3
4
5
6
7
8JavaSE 8 = 52 (0x34 hex),
JavaSE 7 = 51 (0x33 hex),
JavaSE 6 = 50 (0x32 hex),
JavaSE 5 = 49 (0x31 hex),
J2SE 1.4 = 48 (0x30 hex),
J2SE 1.3 = 47 (0x2F hex),
J2SE 1.2 = 46 (0x2E hex),
J2SE 1.1 = 45 (0x2D hex)
下面介绍一下Kali下JDK1.8的安装过程
1、下载jdk安装包
点击下面的链接选择合适的JDK版本下载:
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
2、建立目录,将下载的jdk复制过去并解压
1 | sudo mkdir -p /usr/local/java |
3、配置环境变量
1 | sudo vim /etc/profile |
4、通知系统java的位置
1 | sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_161/bin/java" 1 |
5、设置默认JDK
1 | sudo update-alternatives --set java /usr/local/java/jdk1.8.0_161/bin/java |
6、重新载入profile
1 | source /etc/profile |
通过 java -version以及javac -version即可看到是否安装完成
参考:http://blog.csdn.net/qq_29343201/article/details/51926430