linux 安装jdk



 jdk版本                jdk-6u43-linux-x64.bin

  安装步骤             将jdk上传到 /usr/local 路径下
                             ls -l  查看路径下文件的操作属性

                             在该路径下   chmod 777   jdk-6u43-linux-x64.bin   最高权限操作

                             ./jdk-6u43-linux-x64.bin    解压
 配置环境变量       vi /etc/prifile          //进入文件的编辑模式 i
 
                             #set  java environment
                            JAVA_HOME=/usr/local/jdk1.6.0_43
                            CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
                            PATH=$JAVA_HOME/bin:$PATH
                            export JAVA_HOME CLASSPATH PATH

     
                            esc  推出编辑模式   shift+；wq保存文件
                            source /etc/profile

                     echo$JAVA_HOME 
                     java –version        

测试             vi  hello.java

                    public class hello{

                    public static void main(String args[]){

                    System.out.prinln(" hello ");

                   }   

                   }

                   javac hello.java

                  java hello              --如果显示hello 就表示环境变量配置好了