When I run bootrun I get a build failed with an exception error

:bootRun FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':bootRun'.
> Process 'command 'C:\Program Files\Java\jdk1.8.0_144\bin\java.exe'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 47.593 secs
Process 'command 'C:\Program Files\Java\jdk1.8.0_144\bin\java.exe'' finished with non-zero exit value 1
07:40:13 AM: External task execution finished 'bootRun'.

group 'com.emanuel'
version '1.0-SNAPSHOT'

buildscript{
    repositories{
        mavenCentral()
    }
    dependencies{
        classpath 'org.springframework.boot:spring-boot-gradle-plugin:1.5.6.RELEASE'
    }
}

apply plugin: 'java'
apply plugin: 'spring-boot'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
  compile 'org.springframework.boot:spring-boot-starter-web:1.5.6.RELEASE'
}

And here's my AppConfig.java

package com.emanuel.giftlib;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;

@EnableAutoConfiguration
public class AppConfig {
    public static void main (String [] args){
        SpringApplication.run(AppConfig.class,args);

    }
}