1.下載jdk-7-linux-x64.rpm(http://www.Oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html)
2. su切換到root權限
3. /usr/java/jdk1.7.0 rpm -ivh jdk-7-linux-x64.rpm,默認安裝路徑為 /usr/java/jdk1.7.0
4. vi /etc/profile
5. 在profile最後追加:
- export JAVA_HOME=/usr/java/jdk1.7.0
- export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
- export PATH=$PATH:$JAVA_HOME/bin
注意中間的鏈接符號是冒號不是分號!
6. source /etc/profile
7. 安裝update-alternatives
update-alternatives --install /usr/bin/java java /usr/java/jdk1.7.0/bin/java 60
配置jdk
update-alternatives --config java
然後出現
- 共有 2 個程序提供“java”。
-
- 選擇 命令
- -----------------------------------------------
- *+ 1 /usr/lib/jvm/jre-1.6.0-openjdk/bin/java
- 2 /usr/java/jdk1.7.0/bin/java
-
- 按 Enter 來保存當前選擇[+],或鍵入選擇號碼:2
回車即可。
java -version 輸出
- java version "1.7.0"
- Java(TM) SE Runtime Environment (build 1.7.0-b147)
- Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode)