why java.exe exit with value 1 in android studio

Question

Error:Execution failed for task \':app:dexDebug\'.

com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process

Answer 1

I just add these lines and it works. You can try but not sure it will solve your problem.

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_6
    targetCompatibility JavaVersion.VERSION_1_6
}