在VS代码中构建Java项目时出错

Question

我正在VS代码中使用Java。我将time4j库导入到我的项目中，当我试图编译该项目时，会出现以下错误：

Executing task: gradlew build   -Dorg.gradle.java.home="C:\Users\Public\wpilib\2020\jdk" <


> Task :compileJava FAILED
D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:5: error: package net.time4j does not exist
import net.time4j.SystemClock;
                 ^
D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:6: error: package net.time4j does not exist
import net.time4j.TemporalType;
                 ^
D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:43: error: cannot find symbol
        this.clock = TemporalType.CLOCK.from(SystemClock.MONOTONIC);
                                             ^
  symbol:   variable SystemClock
  location: class PID
D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:43: error: package TemporalType does not exist
        this.clock = TemporalType.CLOCK.from(SystemClock.MONOTONIC);
                                 ^
4 errors
Compilation Error!
GradleRIO detected this build failed due to a Compile Error (compileJava).
Check that all your files are saved, then scroll up in this log for more information.

FAILURE: Build failed with an exception.

但是当我编写程序时，没有任何错误，time4j也很好！我是java新手，我不明白自己做错了什么。谢谢!

Answer 1

首先，检查time4j的引用路径并使其正确，因为错误是package net.time4j does not exist；

如果它确实存在，我们可以尝试：

1. 下载.jar文件并将其复制到应用程序项目中的/libs/文件夹；

在项目dependency {compile filetree (DIR: 'libs', include:' *. Jar ')};文件的根级打开

1. ，并编辑依赖项以包含新的.Jar文件：

1. 重建项目.