java - libgdx 源代码构建错误无法解析为类型

Question

我在设置 Libgdx 源代码时遇到问题，我已遵循以下两个设置指南: https://github.com/libgdx/libgdx/wiki/Setting-up-your-Development-Environment-%28Eclipse%2C-Intellij-IDEA%2C-NetBeans%29

https://github.com/libgdx/libgdx/wiki/Running-demos-%26-tests

我已经下载了源代码，拥有最新版本的 JDK，安装了适用于 android 25 的 Android SDK，并完成了所有其他步骤(据我所知正确)，但我有数千个错误我的 libgdx 设置，即使我尝试清理和重建。这些错误都是“无法解析为类型”。有人知道我可能搞砸了哪一步吗？

此外，我尝试运行“ant”，他们忘记在运行演示页面中提及，但仍然没有解决问题。

难道我使用的是 Java 8 JDK，而 libgdx 仍在 Java 7 上？

Description Resource    Path    Location    Type
AnimationCallback cannot be resolved to a type  GwtApplication.java /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt line 214    Java Problem
AnimationScheduler cannot be resolved   GamepadSupport.java /gdx-controllers-gwt/src/com/badlogic/gdx/controllers/gwt/support   line 143    Java Problem
AnimationScheduler cannot be resolved   GamepadSupport.java /gdx-controllers-gwt/src/com/badlogic/gdx/controllers/gwt/support   line 156    Java Problem
AnimationScheduler cannot be resolved   GwtApplication.java /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt line 214    Java Problem
AnimationScheduler cannot be resolved   GwtApplication.java /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt line 223    Java Problem
AnimationScheduler cannot be resolved to a type GamepadSupport.java /gdx-controllers-gwt/src/com/badlogic/gdx/controllers/gwt/support   line 136    Java Problem
ArrayBuffer cannot be resolved to a type    DirectByteBuffer.java   /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 43 Java Problem
ArrayBuffer cannot be resolved to a type    DirectByteBuffer.java   /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 47 Java Problem
ArrayBuffer cannot be resolved to a type    DirectReadOnlyByteBuffer.java   /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 41 Java Problem
ArrayBuffer cannot be resolved to a type    DirectReadWriteByteBuffer.java  /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 41 Java Problem
ArrayBuffer cannot be resolved to a type    DirectReadWriteByteBuffer.java  /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 49 Java Problem
ArrayBuffer cannot be resolved to a type    WebGLRenderingContext.java  /gdx-backends-gwt/src/com/google/gwt/webgl/client   line 569    Java Problem
ArrayBuffer cannot be resolved to a type    WebGLRenderingContext.java  /gdx-backends-gwt/src/com/google/gwt/webgl/client   line 577    Java Problem
ArrayBufferNative cannot be resolved    DirectByteBuffer.java   /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 40 Java Problem
ArrayBufferView cannot be resolved to a type    DirectByteBuffer.java   /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 52 Java Problem
ArrayBufferView cannot be resolved to a type    DirectReadOnlyFloatBufferAdapter.java   /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 138    Java Problem
ArrayBufferView cannot be resolved to a type    DirectReadOnlyIntBufferAdapter.java /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 138    Java Problem
ArrayBufferView cannot be resolved to a type    DirectReadOnlyShortBufferAdapter.java   /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 137    Java Problem
ArrayBufferView cannot be resolved to a type    DirectReadWriteFloatBufferAdapter.java  /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 155    Java Problem
ArrayBufferView cannot be resolved to a type    DirectReadWriteIntBufferAdapter.java    /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 153    Java Problem
ArrayBufferView cannot be resolved to a type    DirectReadWriteShortBufferAdapter.java  /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 155    Java Problem
ArrayBufferView cannot be resolved to a type    GwtGL20.java    /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt line 881    Java Problem
ArrayBufferView cannot be resolved to a type    GwtGL20.java    /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt line 882    Java Problem
ArrayBufferView cannot be resolved to a type    GwtGL20.java    /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt line 929    Java Problem
ArrayBufferView cannot be resolved to a type    GwtGL20.java    /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt line 930    Java Problem
ArrayBufferView cannot be resolved to a type    HasArrayBufferView.java /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/nio    line 23 Java Problem
ArrayBufferView cannot be resolved to a type    ScreenUtils.java    /gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/com/badlogic/gdx/utils  line 89 Java Problem
ArrayBufferView cannot be resolved to a type    WebGLRenderingContext.java  /gdx-backends-gwt/src/com/google/gwt/webgl/client   line 565    Java Problem
ArrayBufferView cannot be resolved to a type    WebGLRenderingContext.java  /gdx-backends-gwt/src/com/google/gwt/webgl/client   line 573    Java Problem
ArrayBufferView cannot be resolved to a type    WebGLRenderingContext.java  /gdx-backends-gwt/src/com/google/gwt/webgl/client   line 829    Java Problem

Answer 1

您是否在 java 构建路径中添加了所需的 .jars 文件。

通过右键单击项目 → 构建路径 → 配置构建路径，在 Eclipse 中添加所需的 jar。在“库”选项卡下，单击“添加 Jars”或“添加外部 JAR”并提供 Jar。