小编use*_*848的帖子

[Tomcat] validateJarFile(servlet-api.jar) - jar未加载.违规类:javax/servlet/Servlet.class org.apache.catalina.loader.WebappClassLoader validateJarFile INFO:validateJarFile(\ WEB-INF\lib\servlet-api.jar) - jar未加载.请参阅Servlet规范2.3,第9.7.2节.违规类:javax/servlet/Servlet.class.

我搜索了这个,我知道我在我的项目WEB-INF/lib中使用servlet-api.jar,而且我在tomcat/lib文件夹中也有相同的servlet-api.jar.所以我必须删除servlet-api.jar,但是如果我删除那个jar,我在导入javax.servlet时遇到错误.*; 所以如何解决这个问题,帮我解决这个错误.谢谢你

我有三个arraylist,在这里我必须连接2个arraylist并将它显示为第三个arraylist.我的编码如下,

编码::

List<String> firstName  = new ArrayList<String>();
List<String> lastName  = new ArrayList<String>();
         /////inserting first name
         String string1 = "aaa";
         firstName.add(string1);
         String string2 = "bbb";
         firstName.add(string2);
         ///////inserting last name
         String string3 = "yyy";
         lastName.add(string3);
         String string4 = "zzz";
         lastName.add(string4);

 /////////first name 
        Iterator<String> iterator = firstName.iterator();
        while(iterator.hasNext()){
         String FirstName = iterator.next();
         System.out.println(" FirstName   "+FirstName);
        }
 //////////////last name
        Iterator<String> iterator1 = lastName.iterator();
        while(iterator1.hasNext()){
         String LastName = iterator1.next();
         System.out.println(" LastName  "+LastName);
        }
List<String> name=new ArrayList<String>();
        ///////////name=firstname+lastname
        Iterator<String> iterator11 = lastName.iterator();
        while(iterator11.hasNext()){
         name=firstName+lastName;///////here getting error …