Java lambda语法解释

作者 2,259

为了简化代码的书写，简洁的java语法lambda下面介绍下。 lambda 表达式的语法格式如下：

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(parameters) -> expression
或
(parameters) ->{ statements; }

下面推导和简化过程步骤： [cr…

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Centos 8安装Java 11 (OpenJDK 11) 与环境变量配置

作者 4,857

我们使用cordova的时候需要安装其他的应用依赖，在进行环境检查的时候出现如下：

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[root@localhost myapp]# cordova requirements
 
Requirements check results for android:
Java JDK: not installed
Failed to find 'JAVA_HOME' environment variable. Try setting it manually.
Android SDK: not installed
Failed to find 'ANDROID_SDK_ROOT' environment variable. Try setting it manually.
Failed to find 'android' command in your 'PATH'. Try update your 'PATH' to include path to valid SDK directory.
Android target: not installed
Command failed with ENOENT: android list target
spawn android ENOENT
Gradle: not installed
Could not find gradle wrapper within Android SDK. Could not find Android SDK directory.
Might need to install Android SDK or set up 'ANDROID_SDK_ROOT' env variable.
 
Requirements check results for ios:
Apple macOS: not installed
Error: Cordova tooling for iOS requires Apple macOS
Some of requirements check failed
[root@localhost myapp]#

通过上面我们可以知道java jdk并没有安装，这…

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