我是Ionic的入门者。当我构建第一个离子应用程序时，遇到错误。
Error:Failed to run "java -version", make sure that you have a JDK installed.
Error:D:\andorid\ionic\test\platforms\android\cordova\build.bat: command failed with exit code 2
at ChildProcess.whenDone <C:\users\L\appdata\roaming\npm\node_modules\cordova\node_modules\cordova-lib\src\cordova\suoerspawn.js:131:23>
at ChildProcess. emit <events.js:110:17>
at maybeClose <child_process.js:1008:16>
at Process.ChildProcess._handle.onexit <child_process.js:1080:5>
实际上，我的Java环境已正确安装。我可以运行“ java -version”。
Java version "1.8.0_20"
Java<TM> SE Runtime Environment <build 1.8.0_20-b26>
Java HotSpot<TM> 64-Bit Server VM <build 25.20-b23,mixed mode>
怎么解决呢？