小编App*_*sei的帖子

考虑:

int[][] multD = new int[5][];
multD[0] = new int[10];

这是你如何创建一个包含5行和10列的二维数组？

我在网上看到了这段代码,但语法没有意义.

可能重复:
参数和参数之间有什么区别？

我正在经历一些面试问题.我无法对这个问题提出一个可靠的答案:

Java中参数和参数之间的区别？
他们有什么不同？

我在下面有这段代码.如何初始化每个元素= false？

boolean[] seats = new boolean[10]

我看到了类似的问题.但是,第二行对我来说没有意义(你能解释第二行吗？).

 Boolean[] array = new Boolean[size];
 Arrays.fill(array, Boolean.FALSE);

我正在尝试在Windows7 64位上打开Oracle SQL Developer.

当我试图打开SQL Developer时,它询问了java.exe路径,我给了C:\ Java\jdk1.6.0_34\jre\bin\java.exe

我从Oracle SQL Developer收到错误说:无法找到Java虚拟机.指向JVM的位置.请参考oracle9i jdeveloper安装指南(jdev install.html)

关于如何解决这个问题的任何线索？

另一种方案:

这对我有好几次了.安装JDK7并指向jdk7\jre\bin\java.exe的位置

如何在我的网站上添加图像背景？

body {
     margin: 0;
     background: url(background.png);
     background-size: 1440px 800px;
     background-repeat:no-repeatdisplay: compact;
     font: 13px/18px "Helvetica Neue", Helvetica, Arial, sans-serif;

我做了那么多,但我的页面上没有显示任何内容.我是CSS初学者.

更新:

body {
 margin: 0;
 background-image: url(.../img/background.jpg);
 background-size: 1440px 800px;
 background-repeat:no-repeat;
 display: compact;
 font: 13px/18px "Helvetica Neue", Helvetica, Arial, sans-serif;

如何在groovy中显示值是真还是假？我正在使用Eclipse作为我的IDE.

    assert 4 * ( 2 + 3 ) - 6 == 14 //integers only

而且我也不理解Groovy中的"断言".它是否像Java中的if()语句/ boolean？

"断言"在Groovy中扮演什么角色？

我开始使用Twitter Bootstrap和Spring MVC创建一些东西.有人能告诉我将Bootstrap CSS/JS/HTML文件放在maven项目结构中的哪个位置？

我的JSP页面显示正常.但是,它无法控制CSS和JS文件.

<link href="..resources/css/bootstrap.css" rel="stylesheet">
<link href="../resources/css/bootstrap-responsive.css" rel="stylesheet">

我部署了一个.ear文件并得到了这个错误.我是JBoss的新手,我不知道如何修复它.

18:36:15,903 INFO  [ServerImpl] Starting JBoss (Microcontainer)...
18:36:15,904 INFO  [ServerImpl] Release ID: JBoss [The Oracle] 5.1.0.GA (build: SVNTag=JBoss_5_1_0_GA date=200905221053)
18:36:15,904 INFO  [ServerImpl] Bootstrap URL: null
18:36:15,904 INFO  [ServerImpl] Home Dir: /Users/ronyjohn007/JBOSS/jboss-5.1.0.GA
18:36:15,904 INFO  [ServerImpl] Home URL: file:/Users/ronyjohn007/JBOSS/jboss-5.1.0.GA/
18:36:15,904 INFO  [ServerImpl] Library URL: file:/Users/ronyjohn007/JBOSS/jboss-5.1.0.GA/lib/
18:36:15,905 INFO  [ServerImpl] Patch URL: null
18:36:15,905 INFO  [ServerImpl] Common Base URL: file:/Users/ronyjohn007/JBOSS/jboss-5.1.0.GA/common/
18:36:15,905 INFO  [ServerImpl] Common Library URL: file:/Users/ronyjohn007/JBOSS/jboss-5.1.0.GA/common/lib/
18:36:15,905 INFO  [ServerImpl] Server Name: default
18:36:15,906 INFO  [ServerImpl] Server Base Dir: /Users/ronyjohn007/JBOSS/jboss-5.1.0.GA/server
18:36:15,906 INFO  [ServerImpl] Server …

经历了StackOverFlow中显示的大多数错误,仍然无法解决它.我正在尝试部署SpringMVC应用程序.但是,我无法让它发挥作用.

Maven部署错误:

[ERROR] Failed to execute goal org.codehaus.mojo:tomcat-maven-plugin:1.1:redeploy (default-cli) on project productmgmt: Cannot invoke Tomcat manager: Server returned HTTP response code: 401 for URL: http://localhost:8080/manager/text/deploy?path=%2Fproductmgmt&war=&update=true -> [Help 1]

pom.xml中:

<build>
        <finalName>productmgmt</finalName>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>tomcat-maven-plugin</artifactId>
                <configuration>
                    <url>http://localhost:8080/manager/text</url>
                    <path>/productmgmt</path>
                    <username>admin</username>
                    <password>password</password>
                </configuration>
            </plugin>
        </plugins>
    </build>

Tomcat的users.xml中

<role rolename="admin"/>
  <role rolename="manager"/>
  <user username="admin" password="admin" roles="admin,manager"/>
</tomcat-users>

更多信息:

[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

这对我有用

<role rolename="manager-script"/>
<role rolename="admin-script"/>
<user …

我在Eclipse IDE上遇到此错误.

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" id="WebApp_ID" version="2.4">
  <javaee:display-name>Spring Web MVC Application</javaee:display-name>
  <filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>springSecurityFilterChain</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <context-param>
    <javaee:param-name>contextConfigLocation</javaee:param-name>
    <javaee:param-value>/WEB-INF/mvc-dispatcher-servlet.xml /WEB-INF/spring-security.xml</javaee:param-value>
  </context-param>
  <listener>
    <javaee:listener-class>org.springframework.web.context.ContextLoaderListener</javaee:listener-class>
  </listener>

Eclipse问题日志

Description Resource    Path    Location    Type
cvc-complex-type.2.4.a: Invalid content was found starting with element 'javaee:display-name'. One of '{"http://java.sun.com/xml/ns/j2ee":description, "http://java.sun.com/xml/ns/j2ee":display-name, "http://java.sun.com/xml/ns/j2ee":icon, "http://java.sun.com/xml/ns/j2ee":distributable, "http://java.sun.com/xml/ns/j2ee":context-param, "http://java.sun.com/xml/ns/j2ee":filter, "http://java.sun.com/xml/ns/j2ee":filter-mapping, "http://java.sun.com/xml/ns/j2ee":listener, "http://java.sun.com/xml/ns/j2ee":servlet, "http://java.sun.com/xml/ns/j2ee":servlet-mapping, "http://java.sun.com/xml/ns/j2ee":session-config, "http://java.sun.com/xml/ns/j2ee":mime-mapping, "http://java.sun.com/xml/ns/j2ee":welcome-file-list, "http://java.sun.com/xml/ns/j2ee":error-page, "http://java.sun.com/xml/ns/j2ee":jsp-config, "http://java.sun.com/xml/ns/j2ee":security-constraint, "http://java.sun.com/xml/ns/j2ee":login-config, "http://java.sun.com/xml/ns/j2ee":security-role, "http://java.sun.com/xml/ns/j2ee":env-entry, "http://java.sun.com/xml/ns/j2ee":ejb-ref, …