Sun JRE java虛擬機器不能向下相容之謎（Initializing Java loader）

今天我用MySQL Migration Toolkit ，說是沒有安裝JRE ，就是java虛擬機器有沒有搞錯，我裝jdk7了這種事經常遇到，你裝高版本的JRE 他老兄說你沒有裝

很多人就這樣去裝好幾個版本的JRE

作為高手必須知道問題出在哪兒？ 開啟命令列輸出如下：  

 MySQL Generic Runtime Environment 2.0.12 Type 'help' or '?' for help. Type 'quit' to exit the shell.Lua Shell initialized.Registered 12 struct definition files.Initializing native loader...Initializing Java loader...ERROR: The JRE 1.4 or newer cannot be found.Please make sure the Sun JRE 1.4 or newer is installed correctly.Verify the following registry key:HKEY_LOCAL_MACHINE/SOFTWARE/JavaSoft/Java Runtime Environment/1.4/RuntimeLib  Error initializing Java module loader (10012). Please check the ./java and ./java/lib directories.Initializing Lua loader...Initializing Python loader...Registered 5 builtin modules.Registered 13 Lua modules. /

原來是註冊表沒有1.4資訊（廢話jdk7是1.7）做個reg檔案匯入就OK了    Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE/SOFTWARE/JavaSoft/Java Runtime Environment/1.4]"RuntimeLib"="C://Program Files//Java//jre1.7.0//bin//client//jvm.dll"