我是JAVA开发的新手,在Eclipse中编译类时遇到以下问题。 编译时的错误如下:
“ Java虚拟机启动器 错误:发生了JNI错误,请检查您的安装,然后重试。“
错误如下:
“ Java虚拟机启动器 发生了Java异常。“
在控制台中,出现的错误如下:
*Exception in thread "main" java.lang.NoClassDefFoundError: com/beust/jcommander/ParameterException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.beust.jcommander.ParameterException
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more*
有人可以帮助我吗? 感激。
AppTest.java
package all_Exercices.Different_Browsers;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.testng.annotations.Parameters;
public class AppTest
{
WebDriver driver;
@Parameters("browser")
public void verifypageTitle(String browserName)
{
if(browserName.equalsIgnoreCase("firefox"))
{
driver = new FirefoxDriver();
}
else if(browserName.equalsIgnoreCase("chrome"))
{
System.setProperty("webdriver.chrome.driver", "C:\\SeleniumGecko\\chromedriver.exe");
driver = new ChromeDriver();
}
else if(browserName.equalsIgnoreCase("IE"))
{
System.setProperty("webdriver.ie.driver", "C:\\SeleniumGecko\\IEDriverServer.exe");
driver = new InternetExplorerDriver();
}
driver.manage().window().maximize();
driver.get("https://shopcart-challenge.4all.com/");
System.out.println(driver.getTitle());
driver.quit();
}
}
crossbrowser.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Suite" parallel="tests">
<test name="FirefoxTestCases">
<parameter name="browser" value="firefox"/>
<classes>
<class name="all_Exercices.Different_Browsers.AppTest"/>
</classes>
</test> <!--Test -->
<test name="ChromeTestCases">
<parameter name="browser" value="chrome"/>
<classes>
<class name="all_Exercices.Different_Browsers.AppTest"/>
</classes>
</test> <!--Test -->
<test name="IETestCases">
<parameter name="browser" value="ie"/>
<classes>
<class name="all_Exercices.Different_Browsers.AppTest"/>
</classes>
</test> <!--Test -->
</suite> <!--Suite -->
POM.XML
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>4all_Exercices</groupId>
<artifactId>Different_Browsers</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Different_Browsers</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
答案 0 :(得分:0)
如果抛出java.lang.ClassNotFoundException
或java.lang.NoClassDefFoundError
异常,则表示JVM在类路径中找不到消息中提到的类(此处为com.beust.jcommander.ParameterException
)。 / p>
程序的任何部分,很可能是测试启动器(TestNG,或者在您的情况下为JUnit),似乎都在使用命令行解析器 Cedric Beust 的 JCommander 。
在构建类路径中添加所需的类(在本例中为整个jar)将使JVM查找并加载它。由于您拥有Maven项目,因此可以简单地在dependencies
元素/标签内将依赖项添加到POM.xml :
<dependency>
<groupId>com.beust</groupId>
<artifactId>jcommander</artifactId>
<version>1.71</version>
</dependency>
请参见JCommander Download section。
这个问题描述了一个类似的问题:Getting "java.lang.NoClassDefFoundError: com/beust/jcommander/ParameterException"Exception