如何安装用于创建语音应用程序的库

Question

我尝试按照Nexmo指南创建语音应用，但 我遇到了一些错误。

首先，我尝试安装该库并出现错误，然后初始化该库

    // We're creating a Java Application:
    apply plugin: 'application'
    apply plugin: 'java'

    // Download dependencies from Maven Central:
    repositories {
    mavenCentral()
    }

      // Install the Nexmo Client library:
    dependencies {
      compile 'com.nexmo:client:2.0.1'
      compile 'com.nexmo:client:4.+'

}

       // We'll create this class to contain our code:
        mainClassName = "getstarted.SendSMS"

• 出了什么问题

  Execution failed for task ':compileJava'.
  > Compilation failed; see the compiler error output for details.