??最近在Linux上運行java程序出現Unsupported major.minor version 51.0錯誤，后發現是編譯后的java程序與Linux上的java Se版本不一致而產生的錯誤。提示的版本號與Java se對應表如下：

JavaSE 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)

下面介紹一下Kali下JDK1.8的安裝過程

1、下載jdk安裝包

??點擊下面的鏈接選擇合適的JDK版本下載：
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

2、建立目錄，將下載的jdk復制過去并解壓

sudo mkdir -p /usr/local/java sudo cp jdk-8u161-linux-x64.tar.gz /usr/local/java cd /usr/local/java sudo tar xzvf jdk-8u91-linux-x64.tar.gz

3、配置環境變量

sudo vim /etc/profile ###復制以下代碼到文件結尾 JAVA_HOME=/usr/local/java/jdk1.8.0_161 PATH=$PATH:$HOME/bin:$JAVA_HOME/bin export JAVA_HOME export PATH

4、通知系統java的位置

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk1.8.0_161/bin/java" 1 sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk1.8.0_161/bin/javac" 1 sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_161/bin/javaws" 1 sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/jdk1.8.0_161/bin/javaws" 1

5、設置默認JDK

sudo update-alternatives --set java /usr/local/java/jdk1.8.0_161/bin/java sudo update-alternatives --set javac /usr/local/java/jdk1.8.0_161/bin/javac sudo update-alternatives --set javaws /usr/local/java/jdk1.8.0_161/bin/javaws

6、重新載入profile

source /etc/profile

通過 java -version以及javac -version即可看到是否安裝完成
參考：http://blog.csdn.net/qq_29343201/article/details/51926430

總結

以上是生活随笔為你收集整理的Kali下JDK1.8的安装过程的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。