JavaFX的自动完成功能在Eclipse Luna中不起作用 [英] Auto-completion for JavaFX not working in eclipse luna

问题描述

在尝试JavaFX时，我目前在自动完成方面遇到问题.我有一个标准Java项目，将Java 8设置为源和目标:

While trying out JavaFX, I'm currently having problems with auto-completion. I have a standard-maven project with Java 8 set as source and target:

         <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <encoding>UTF-8</encoding>
            </configuration>
        </plugin>

这已被正确识别，我可以对Stream API使用自动补全功能，等等.

This is correctly recognized, I can use auto-completion for Stream API and so on.

一些线程，例如如何在Eclipse Swing项目中使用JavaFX ，表明jfxrt是使用JavaFX所必需的. Eclipse在/usr/lib/jvm/java-8-oracle/下使用了正确的JVM，并且在/usr/lib/jvm/java-8-oracle/jre/lib/ext/jfxrt中找到了正确的jfxrt.jar.罐.如果我手动(在Package Explorer中)打开JRE系统库-> jfxrt.jar-> javafx.embed.swing，我会看到JFXPanel应该放置在那里.

Some threads, e.g. How to Use JavaFX in Eclipse Swing Project, show that jfxrt is necessary for using JavaFX. Eclipse uses the correct JVM under /usr/lib/jvm/java-8-oracle/ and it does find the correct jfxrt.jar in /usr/lib/jvm/java-8-oracle/jre/lib/ext/jfxrt.jar. If I manually open (in the Package Explorer) JRE System Library -> jfxrt.jar -> javafx.embed.swing I see JFXPanel laying there as it should.

尽管如此，当我在输入JFXPanel后点击Strg + Space时，它仅告诉我使用该名称创建一个类.即使我写import javafx.embed.swing，也只建议我写import javafx.embed.swing.*而不是此程序包中的任何类.

Nevertheless, when I hit Strg + Space after the input of JFXPanel it only tells me to create a class with this name. Even if I write import javafx.embed.swing it only suggests me to write import javafx.embed.swing.* instead of any class in this package.

这种行为对我来说似乎很尴尬.谁能告诉我，为什么Eclipse无法完成此操作，或者我可以做些什么来防止此问题发生?

This behaviour seems very awkward to me. Can anyone tell me, why eclipse isn't able to complete this or what I could do to prevent this problem from happening?

推荐答案

转到项目属性-> Java构建路径-> []-> JRE系统库.检查您是否使用的是jdk，而不是jre.如果使用jre切换到jdk，问题将得到解决

Go to project properties -> Java Build Path -> [] -> JRE System Library. Check whether you are using a jdk and not a jre. If using a jre switch to a jdk and the issue will be resolved

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