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 'command 'C:Program FilesJavajdk1.7.0_75injava.exe'' finished with non-zero exit value 1

Answer 1

upgraded gradle version

classpath 'com.android.tools.build:gradle:1.1.2'

and updated android studio worked