Fast is initialized. FAST Version: 2.3.1 17.01.25.19.41 JRE Version: 1.8.0_312 JRE Specification: 1.8 JRE Home: C:\Program Files\openjdk\jre OS Name: Windows 7 OS Version: 6.1 Architecture: amd64 Username: Administrator User Home: C:\Users\Administrator Working Directory: G:\first Path Separator: ; File Separator: \ Line Separator: fast build initialized. PROJECT_DIR: G:\first fast.yml is found at: G:\first\fast.yml Got the JAVA_HOME from environment variable. JAVA_HOME: C:\Program Files\openjdk Got FAST_HOME from environment variable. FAST_HOME: C:\Users\Administrator\AppData\Local\Fast KOTLIN_HOME: C:\Users\Administrator\AppData\Local\Fast\lib\compiler\1.9.24\kotlinc Kotlin compiler is not exists! AndroidManifest.xml is found at: G:\first\src\AndroidManifest.xml Package name is: cn.kevinkun.first Checking the availablity of .kt files. Checking the availablity of .java file. Getting provided libraries. Got 0 libraries. Getting the libraries of deps folder. Increasing components version. Compiling java classes. Found 1 sources. Successfully created javac arguments Calling javac commands. G:\first\src\cn\kevinkun\first\first.java:3: 错误: 程序包com.google.appinventor.components.annotations不存在 import com.google.appinventor.components.annotations.DesignerComponent; ^ G:\first\src\cn\kevinkun\first\first.java:4: 错误: 程序包com.google.appinventor.components.annotations不存在 import com.google.appinventor.components.annotations.SimpleFunction; G:\first\src\cn\kevinkun\first\first.java:5: 错误: 程序包com.google.appinventor.components.runtime不存在 import com.google.appinventor.components.runtime.ComponentContainer; ^ G:\first\src\cn\kevinkun\first\first.java:6: 错误: 程序包com.google.appinventor.components.runtime不存在 import com.google.appinventor.components.runtime.AndroidNonvisibleComponent; G:\first\src\cn\kevinkun\first\first.java:14: 错误: 找不到符号 public class first extends AndroidNonvisibleComponent { ^ 符号: 类 AndroidNonvisibleComponent G:\first\src\cn\kevinkun\first\first.java:8: 错误: 找不到符号 @DesignerComponent( ^ 符号: 类 DesignerComponent G:\first\src\cn\kevinkun\first\first.java:16: 错误: 找不到符号 public first(ComponentContainer container) { ^ 符号: 类 ComponentContainer 位置: 类 first G:\first\src\cn\kevinkun\first\first.java:20: 错误: 找不到符号 @SimpleFunction(description = "Returns sum of two integer numbers.") ^ 符号: 类 SimpleFunction 8 个错误 javac is failed to execute! java.io.IOException: BUILD FAILED! at com.jewel.fast.repacked.rAmhoyihgEGySuUDNFhO.(JavaCompiler.java:77) at com.jewel.fast.repacked.NtYtbwyrLKtbUfQajvtn.(Build.java:362) at com.jewel.fast.Fast.main(Fast.java:58)