title: problems after installing java 8
body: <p>Android Studio had a popup telling updates was available after i run the SDK manager and started the Android Studio again I got another popoup that toke me to Androids website where it told me that I should upgrade to Java JDK 8 and JRE 8 after I did i got over 235 errors when try to run the debug. I uninstalled version 8 and reinstalled 7u80 JDK and JRE now I'm down to 34 errors. When I type java -version I get 1.8.073
  here are all 35 errors.</p>
  
  <pre><code>    Error:java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
  Error:java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0
  Error:  at java.lang.ClassLoader.defineClass1(Native Method)
  Error:  at java.lang.ClassLoader.defineClass1(Native Method)
  Error:  at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
  Error:  at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
  Error:  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
  Error:  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
  Error:  at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
  Error:  at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
  Error:  at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
  Error:  at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
  Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
  Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
  Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
  Error:  at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
  Error:  at java.security.AccessController.doPrivileged(Native Method)
  Error:  at java.security.AccessController.doPrivileged(Native Method)
  Error:  at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
  Error:  at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
  Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
  Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
  Error:  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
  Error:  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
  Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
  Error:  at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
  Error:  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
  Error:  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
  Error:Exception in thread "main" 
  Error:Exception in thread "main" 
  Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
  &gt; com.android.build.api.transform.TransformException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_80\bin\java.exe'' finished with non-zero exit value 1
  </code></pre>
  
  <p>Here is the Gradel.build</p>
  
  <pre><code>android {
      compileSdkVersion 23
      buildToolsVersion '24.0.0 rc1'
      defaultConfig {
          applicationId "com.kim.printer"
          minSdkVersion 21
          targetSdkVersion 23
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
      compileOptions {
          sourceCompatibility JavaVersion.VERSION_1_7
          targetCompatibility JavaVersion.VERSION_1_7
      }
      productFlavors {
      }
  }
  
  dependencies {
      compile 'com.google.android.gms:play-services-gcm:8.4.0'
      compile 'com.google.code.gson:gson:2.4'
      compile "com.android.support:support-v4:23.1.0"
      compile "com.android.support:support-v13:23.1.0"
      compile "com.android.support:cardview-v7:23.1.0"
      compile 'com.android.support:appcompat-v7:23.0.0'
      compile files('libs/StarIOPort3.1.jar')
      compile files('libs/StarIO_Extension.jar')
  }
  </code></pre>
  
  <p>Thanks for any help I have been working on this for 6 hours and I can get it to compile.</p>