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如何让 ORACLE JAVA SE 7 运行？

tag-icon • tag-icon 13.04 java software-installation jdk oracle
如何让 ORACLE JAVA SE 7 运行？

我是 Ubuntu 的新手，所以请多多包涵。

我最近手动下载并安装了 (Java SE 7ux) JavaSE 1.7.0_51。Linux x64（适用于 64 位系统）“tar.gz”包。我的 Ubuntu 版本是 13.10（操作系统 64 位）

我认真遵循以下指示：如何在 Ubuntu 上安装 JDK 7

为了验证安装是否成功，我写道：

javac -version

并得到以下结果：

Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object

$ which java gives the below results:  
/usr/bin/java

$ which javac also gives the below results:
/usr/bin/javac

我重复了几次步骤，以防我错过了重要的步骤，但仍然得到了相同的结果。在网上搜索了几次后，我发现@参考，我实际上可以通过 PPA 存储库在 Ubuntu 上安装 Java。

安装完成后

$ java -version

我仍然得到：

Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object

然而当我

$ cd /usr/bin
$ ls -ld java*

我得到：

lrwxrwxrwx 1 root root 22 Feb 19 19:06 java -> /etc/alternatives/java
lrwxrwxrwx 1 root root 23 Feb 17 02:15 javac -> /etc/alternatives/javac
lrwxrwxrwx 1 root root 25 Feb 19 20:09 javadoc -> /etc/alternatives/javadoc
lrwxrwxrwx 1 root root 32 Feb 19 20:09 javafxpackager -> /etc/alternatives/javafxpackager
lrwxrwxrwx 1 root root 23 Feb 19 20:09 javah -> /etc/alternatives/javah
lrwxrwxrwx 1 root root 23 Feb 19 20:09 javap -> /etc/alternatives/javap
lrwxrwxrwx 1 root root 25 Feb 19 20:09 java_vm -> /etc/alternatives/java_vm
lrwxrwxrwx 1 root root 24 Feb 17 02:15 javaws -> /etc/alternatives/javaws

也类似于：

$ cd /etc/alternatives 
$ ls -ld java*

lrwxrwxrwx 1 root root 36 Feb 19 19:15 java -> /usr/local/java/jdk1.7.0_51/bin/java
lrwxrwxrwx 1 root root 37 Feb 17 02:15 javac -> /usr/local/java/jdk1.7.0_51/bin/javac
lrwxrwxrwx 1 root root 38 Feb 19 20:09 javadoc -> /usr/lib/jvm/java-7-oracle/bin/javadoc
lrwxrwxrwx 1 root root 48 Feb 19 20:09 javadoc.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javadoc.1.gz
lrwxrwxrwx 1 root root 45 Feb 19 20:09 javafxpackager -> /usr/lib/jvm/java-7-oracle/bin/javafxpackager
lrwxrwxrwx 1 root root 55 Feb 19 20:09 javafxpackager.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javafxpackager.1.gz
lrwxrwxrwx 1 root root 36 Feb 19 20:09 javah -> /usr/lib/jvm/java-7-oracle/bin/javah
lrwxrwxrwx 1 root root 46 Feb 19 20:09 javah.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javah.1.gz
lrwxrwxrwx 1 root root 36 Feb 19 20:09 javap -> /usr/lib/jvm/java-7-oracle/bin/javap
lrwxrwxrwx 1 root root 46 Feb 19 20:09 javap.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javap.1.gz
lrwxrwxrwx 1 root root 42 Feb 19 20:09 java_vm -> /usr/lib/jvm/java-7-oracle/jre/bin/java_vm
lrwxrwxrwx 1 root root 42 Feb 17 02:15 javaws -> /usr/local/java/jdk1.7.0_51/jre/bin/javaws

注意

javadoc.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javadoc.1.gz
javafxpackager.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javafxpackager.1.gz
javah.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javah.1.gz
javah.1.gz -> /usr/lib/jvm/java-7-oracle/man/man1/javah.1.gz

...全部为红色

  • 这一切意味着什么？最重要的是，如何使我的 Java 安装正常工作？

期待您的帮助！

答案1

从官方网站下载 Oracle java

从此处的官方网站下载 Java

手动安装 JDK 1.7

#java -version

#sudo mkdir -p /usr/lib/jvm

#sudo mv jdk-7u21-linux-i586.tar.gz /usr/lib/jvm

#cd /usr/lib/jvm

#sudo tar zxvf jdk-7u21-linux-i586.tar.gz

#sudo rm jdk-7u21-linux-i586.tar.gz

#ls -l

#jdk1.7.0_21

#sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0_21/bin/javac" 1

#sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0_21/bin/java" 1

#sudo update-alternatives --set "javac" "/usr/lib/jvm/jdk1.7.0_21/bin/javac"

#sudo update-alternatives --set "java" "/usr/lib/jvm/jdk1.7.0_21/bin/java"

#sudo vi /etc/profile

Add the following entries to the bottom of your /etc/profile file:

#JAVA_HOME=/usr/lib/jvm/jdk1.7.0_21 PATH=$PATH:$JAVA_HOME/bin export JAVA_HOME export PATH

#. /etc/profile

#java -version

将 jdk1.7.0_21 替换为您下载的版本

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