I try to do a testing for HashTable Sychronized behavior today. As an Sychronized Object, HashTable already an Sychronized at put and get function. I wanna to know more about the iterator behaviors on multi-threading. package leetcode; import java.ut…

学习架构探险,从零开始写Java Web框架时,在学习到springAOP时遇到一个异常: "C:\Program Files\Java\jdk1.7.0_40\bin\java" -Didea.launcher.port=7533 "-Didea.launcher.bin.path=D:\JetBrains\xxIntelliJ IDEA 2016.3\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program F…

在学习CGlib动态代理时,遇到如下错误: Exception in thread "main" java.lang.NoSuchMethodError: org.objectweb.asm.ClassWriter.<init>(I)V 经过百度上寻找答案,是jar包冲突导致,解决方案: 把cglib.jar包换成cglib-nodep-2.2.jar,便可以解决这个错误: cglib-nodep-2.2.jar文件下载路径:http://files.cnblogs.com…

运行时出现错误:Exception in thread "main" java.lang.NullPointerException 该问题多半是由于用到的某个对象只进行了声明,而没有初始化,即没有被new. 找到32行:heightTextField.addFocusListener(this); 前面有:JTextField heightTextField;只创建了heigthTextField对象,编写程序时没有报错,但是没有new,不能add. 错误原因:heigthTextFi…

Exception in thread "main" java.lang.SecurityException: Invalid signature file digest for Manifest main attributes at sun.security.util.SignatureFileVerifier.processImpl(SignatureFileVerifier.java:240) at sun.security.util.SignatureFileVerifier.…

Exception in thread "main" java.lang.ExceptionInInitializerErrorCaused by: java.util.MissingResourceException: Can't find bundle for base name javax.servlet.LocalStrings, locale zh_CN at java.util.ResourceBundle.throwMissingResourceException(Res…

用javac编译了一个M.java文件, 然后用java M执行,可是出现了下面这个错误. Exception in thread "main" java.lang.UnsupportedClassVersionError: M : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(C…

Exception in thread "main" java.lang.NoClassDefFoundError: org/jaxen/NamespaceContext      at org.dom4j.DocumentFactory.createXPath(DocumentFactory.java:230 )      at org.dom4j.tree.AbstractNode.createXPath(AbstractNode.java:207)      at org.dom…

场景:eclipse中编写java中用到数组 问题: 程序不报错但是运行过程中 终止,显示字样 “ Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1 ” 截图: 原因: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException 这句话表示异常出现在main这个线程里面,错误是java.lang.Ar…

在64位的操作系统安装oracle10g 软件安装完成后,使用dbca建库的时候报下面的错: $ dbcaUnsatisfiedLinkError exception loading native library: njni10Exception in thread "main" java.lang.UnsatisfiedLinkError: get        at oracle.net.common.NetGetEnv.get(Native Method)        at o…