title: java.io.FileNotFoundException: app/libs/perfectjpattern-core-1.0.0.jar (No such file or directory)
body: <p>Error:Execution failed for task ':app:compileDebugJavaWithJavac'.</p>
  
  <blockquote>
    <p>java.io.FileNotFoundException: /app/libs/perfectjpattern-core-1.0.0.jar (No such file or directory)</p>
  </blockquote>
  
  <p>I know that I need to install JAR. I do not understand how it came to this situation without making a change. It could have been because of the new Android Studio? Prew was using 2.1.alpha4</p>
  
  <p><strong>gradle</strong></p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion "23.0.2"
      useLibrary 'org.apache.http.legacy'
      defaultConfig {
          applicationId "xxxxxxxxxx"
          minSdkVersion 21
          targetSdkVersion 23
          versionCode 11
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
  .....
  compile files('libs/perfectjpattern-core-1.0.0.jar')
  .....
  }
  </code></pre>