MAC JAVA8环境变量配置

下载JAVA8 安装
JAVA8
打开终端运行

/usr/libexec/java_home -V

运行结果：

Matching Java Virtual Machines (1):
1.8.0_112, x86_64:  "Java SE 8"
/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home

3. 检查JDK目录是否齐全：

ls -l /Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/bin/

//运行结果
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 appletviewer
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 extcheck
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 idlj
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 jar
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 jarsigner
-rwxrwxr-x  1 root  wheel  103632 10  1  2016 java
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 javac
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 javadoc
-rwxrwxr-x  1 root  wheel    2293  9 23  2016 javafxpackager
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 javah
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 javap
-rwxrwxr-x  1 root  wheel    2293 10  1  2016 javapackager
-rwxrwxr-x  1 root  wheel  103712 10  1  2016 jcmd
。。。。。。。。。。。。。。

打开/.bash_profile进行环境变量配置

JAVA_8_HOME=$(/usr/libexec/java_home -v 1.8)
export JAVA_HOME=$JAVA_8_HOME
PATH=$JAVA_HOME/bin:$PATH:.
CLASSPATH=JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:.

检查是否成功

java -version

java version "1.8.0_112"
Java(TM) SE Runtime Environment (build 1.8.0_112-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.112-b16, mixed mode)

gradle-retrolambda配置

打开工程build.gradle添加:

classpath 'me.tatarka:gradle-retrolambda:3.6.1'
apply plugin: 'me.tatarka.retrolambda'

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.0'
        classpath 'me.tatarka:gradle-retrolambda:3.6.1'--->这里
    }
}
allprojects {
    repositories {
        jcenter()
        apply plugin: 'me.tatarka.retrolambda'--->这里
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

打开MoDule配置：

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

测试：

btn.setOnClickListener(v ->Toast.makeText(this,btn.getText().toString(),Toast.LENGTH_LONG).show());

lambda