php小编新一带来的Java问答：在开发JavaFX应用程序时，有时会遇到异常java.lang.NoClassDefFoundError，错误提示为org/openqa/selenium/WebDriver。这个异常通常表示缺少WebDriver类的依赖包，需要在项目中添加相应的依赖以解决该问题。接下来我们将详细介绍如何处理这种异常，并提供解决方案，让您顺利解决线程问题。
根据我当前的代码，有什么可能导致此异常的线索吗？
运行以下代码时：
main.java
package application; import java.io.ioexception; import javafx.application.application; import javafx.stage.stage; import javafx.scene.scene; import javafx.scene.control.button; import javafx.scene.layout.gridpane; public class main extends application { @override public void start(stage primarystage) throws ioexception { button runbutton = new button("run"); runbutton.setonaction(e -> { test test = new test(); }); gridpane gridbox = new gridpane(); gridbox.add(runbutton, 0, 0); scene scene = new scene(gridbox, 380, 150); primarystage.setscene(scene); primarystage.show(); } public static void main(string[] args) { launch(args); } }
测试.java
package application; import org.openqa.selenium.webdriver; import org.openqa.selenium.chrome.chromedriver; public class test { webdriver driver; public static void main(string[] args) { test obj = new test(); obj.setupwebsite(); } public void setupwebsite() { //creates chrome window. driver = new chromedriver(); //sets up window to maximize and go to brink website. driver.manage().window().maximize(); driver.get("https://www.google.com"); } }
我得到的只是以下内容：
Exception in thread "JavaFX Application Thread" java.lang.NoClassDefFoundError: org/openqa/selenium/WebDriver at application.Main.lambda$0(Main.java:18) at [email protected]/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86) at [email protected]/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:232) at [email protected]/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:189) at [email protected]/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) at [email protected]/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) at [email protected]/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at [email protected]/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at [email protected]/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at [email protected]/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at [email protected]/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at [email protected]/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) at [email protected]/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49) at [email protected]/javafx.event.Event.fireEvent(Event.java:198) at [email protected]/javafx.scene.Node.fireEvent(Node.java:8875) at [email protected]/javafx.scene.control.Button.fire(Button.java:203) at [email protected]/com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:207) at [email protected]/com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274) at [email protected]/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247) at [email protected]/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80) at [email protected]/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:232) at [email protected]/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:189) at [email protected]/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) at [email protected]/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) at [email protected]/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at [email protected]/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at [email protected]/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at [email protected]/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at [email protected]/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at [email protected]/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) at [email protected]/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54) at [email protected]/javafx.event.Event.fireEvent(Event.java:198) at [email protected]/javafx.scene.Scene$MouseHandler.process(Scene.java:3984) at [email protected]/javafx.scene.Scene.processMouseEvent(Scene.java:1890) at [email protected]/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2708) at [email protected]/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411) at [email protected]/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301) at java.base/java.security.AccessController.doPrivileged(AccessController.java:400) at [email protected]/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:450) at [email protected]/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424) at [email protected]/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449) at [email protected]/com.sun.glass.ui.View.handleMouseEvent(View.java:551) at [email protected]/com.sun.glass.ui.View.notifyMouse(View.java:937) at [email protected]/com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at [email protected]/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:185) at java.base/java.lang.Thread.run(Thread.java:1583) Caused by: java.lang.ClassNotFoundException: org.openqa.selenium.WebDriver at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ... 46 more
我已确认我的所有 jar 文件都位于正确的位置。我可以单独运行 test.java 文件。我有这个代码的更大版本，最初认为这是由于整个代码有问题，但发现即使精简到这个，它仍然会继续。
想通了。我必须将所有 JAR 文件添加到运行配置类路径中。
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