新手指导：namenode格式化 JAVA_HOME is not set and could not be found.

来源about云群友：
问题：
$ bin/hadoop namenode -format
/home/admin/hadoop-2.2.0/etc/hadoop/hadoop-env.sh: line 27: syntax error near unexpected token `('
/home/admin/hadoop-2.2.0/etc/hadoop/hadoop-env.sh: line 27: `export JAVA_HOME=C:\Program Files (x86)\Java\jdk1.6.0_19'

Error: JAVA_HOME is not set and could not be found.
  这个怎么回事
解答：
JAVA_HOME is not set and could not be found.
那个不能有空格.