Fedora 15 安裝Sun/Oracle Java JDK 7

Sun/Oracle的Java JDK 7可能與OpenJDK的不兼容，在Fedora 15中可以使用包管理器安裝。具體如何安裝呢？打開終端，使用下面的命令安裝：

For 64-bit

wget "http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-x64.rpm"
su -c 'rpm -i jdk-7-linux-x64.rpm'

For 32-bit

wget "http://download.oracle.com/otn-pub/java/jdk/7/jdk-7-linux-i586.rpm"
su -c 'rpm -i jdk-7-linux-i586.rpm'

If you already have OpenJDK/OpenJRE installed, you will need to configure your system so that the applications use the Sun/Oracle Java version instead of OpenJDK/OpenJRE. Here is how to do it:

su -c 'alternatives --install /usr/bin/java java /usr/java/jdk1.7.0/jre/bin/java 20000'
su -c 'alternatives --install /usr/bin/javaws javaws /usr/java/jdk1.7.0/jre/bin/javaws 20000'
su -c 'alternatives --install /usr/bin/javac javac /usr/java/jdk1.7.0/bin/javac 20000'
su -c 'alternatives --install /usr/bin/jar jar /usr/java/jdk1.7.0/bin/jar 20000'

For 64-bit:

su -c 'alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/jdk1.7.0/jre/lib/amd64/libnpjp2.so 20000'

For 32-bit:

su -c 'alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so libjavaplugin.so /usr/java/jdk1.7.0/jre/lib/i386/libnpjp2.so 20000'