java lang securityexception

Debug with myeclipseCodeWe often add the main method to the Java file for debugging. Sometimes the following errors may occur due to package compatibility problems, resulting in debugging failure: **************************************** ********************** Exception in thread "Main" Java. lang. linkageerror: jaxb 2.0 API is being loaded from the bootstrap cl

The code for getfreeconnection is as follows: Public connection getfreeconnection (){ // Return the conn class of the database connection to intercept the close method. Connection conn2 = NULL; If (conn instanceof connection ){ Conn2 = (connection) proxy. newproxyinstance (conn. getclass (). getclassloader (), conn. getclass (). getinterfaces (), this ); } Return conn2; } There is no problem with the database driver of mysqlv5. When using the database drivers of mysqlv6 and Oracle, the following

Today, I am running the normal Play framwork 2.0 project on the server, the following error occurs [plain] [info] Compiling 25 Scala sources and 1 Java source to/home/admin/git/project/target/scala-2.9.1/classes... [error] {file:/home/admin/git/project/} project/compile: java. lang. stackOverflowError [error] Total time: 19 s, completed 15:35:14 google, mostly be

Package java. Lang;Import java. Io .*; /**** Throwable is the parent class of all errors and exceptiong.* Note that there are four constructors:* Throwable ()* Throwable (string message)* Throwable (throwable cause)* Throwable (string message, throwable cause)** Comment by liqiang**/Public class throwable implements serializable {Private Static final long serialv

Most of the content in this article is taken from the following two articles: Http://blog.xebia.com/2007/10/04/leaking-memory-in-java /, Http://www.iteye.com/topic/626801 Use an extreme example to illustrate the outofmemoryerror caused by the string substring method: public class TestGC { private String large = new String(new char[100000]); public String getSubString() { return this.large.substring(0,2); } public static void

Ndk make: *** no rule can be created $ Ndk/ndk-build The above error is generally because Android. mk in your JNI file contains spaces that are not suitable. There may be many reasons for this problem.If this problem occurs, check the Android. mk file and remove all useless spaces. ========================================================== ====================================== Android Ubuntu JNI so error: Java.

done after your reference, Here I will only talk about solutions that may cause problems. After writing the code, run, test, and an exception occurs: Java. lang. noclassdeffounderror: ORG/Apache/Oro/text/perl/perl5util The following error message indicates that the class definition is missing: ORG/Apache/Oro/text/perl/perl5util. And this class exists with the jakarta-oro.jar package, this package g

1. The error "Java. Lang. classnotfoundexception: COM. Microsoft. JDBC. sqlserver. sqlserverdriver" is displayed: The final cause may be as follows: 1. SQL Server 2000 driver for JDBC is not installed 2. Pay attention to you after installationProgramWhether the package of the class has imported three files under the Lib file after the SQL Server 2000 driver for JDBC program is installed: C:/program file

Question: 1. In the Java API Doc, I saw the statement below: This integer need not remain consistent from one execution of an application to another execution of the same application. Does it mean that on each execution, the hashcode may be different?But I run this programme (fragment below) sereral times: System. Out. println ("C1 hashcode:" + c1.hashcode (); system. Out. println ("C2 hashcode:" + c2.hashcode ()); They return the same code

Error message exception in thread "Main" Java. lang. exceptionininitializererrorat Org. hibernate. cfg. configuration. reset (configuration. java: 330) at Org. hibernate. cfg. configuration. My little hibernatedemo example (hibernate3.6.0) has not been changed. I just changed a setting of eclipse Jee 3.6. As shown in the following figure: When you add the user li

An exception occurs after one-to-multiple bidirectional Association of @ onetovers using spring + hibernate Annotations:Java. Lang. nosuchmethoderror: javax. Persistence. oneto133. orphanremoval () ZThis exception usually occurs because the Java ee. Jar version of myeclipse is relatively low, and conflicts with the built-in JPA such as hibernate. Some processing methods on the Internet are to delete the

Lab environment: JDK 1.6, Axis2-1.3, using SSL/TLS (one-way/two-way authentication), Tomcat 5.5/glassfish v2 When you use SSL/TLS to access the Web Service of axis2, the following error occurs:Exception in thread "Main" org. Apache. axis2.axisfault: Java. Lang. nullpointerexception This error is caused by the use of transportsession in the created web service-in service. xml:Transportsession">For solution

Problem description: Download the electronic report. When the electronic report is too large, "root causeServletexception java. Lang. outofmemoryerror"Problem status: resolvedSolution: Adjust the commenv parameters in BEA, WebLogic, and common.: SunIf "% production_mode %" = "true" Goto sun_prod_modeSet java_vm =-ClientSet mem_args =-xms256m-xmx512m-XX: maxpermsize = 256 mSet java_options = % java_options %

Java. Lang. noclassdeffounderror: org. ksoap2.serialization. soapobject This is becauseProgramThe Org. ksoap2.serialization. soapobject package is not marked or is not completed. 1. In project properties, right-click the project Check whether the corresponding package is marked in Java build path --> libraries. 2. In order and export, select the correspondi

A piece of code today throws java. Lang. illegalmonitorstateexception. The Code is as follows: private boolean wait = false;public boolean pleaseWait() {synchronized (this.wait) {if (this.wait == true) {return false;}this.wait =true;try {this.wait.wait();} catch (InterruptedException e) {}return true;} The explanation of illegalmonitorstateexception on javadoc is: Thrown to indicate that a thread has atte

These days I encountered a problem: Java. Lang. unsupportedclassversionerror: bad version number in. class always occurs when I use myeclipse to compile a class! The method on the internet is generally classified as two. One can't find the. Class file, but I have. One said that the JDK version is incorrect, but I found it all according to what they said. No problem, it is 1.6. Myeclipse is also set to 6.0.

ViewPager is used for projects over the past few days, because it can achieve the effect of moving multiple pages left and right, and then When ListView is used on each page, "PagerAdapter java. lang. IllegalStateException" is always displayed during runtime: The specified child already has a parent. You must call removeView ()... "causes The program to end. Displayed on PagerAdapter during debugging: @ Ove

Exception error: HTTP Status 500- Type Exception report Message Description The server encountered an internal error () that prevented it from fulfilli ng this request. Exception org. apache. jasper. JasperException: javax. servlet. ServletException: java. lang. NoSuchMethodError: Method Solution: delete everything in the work folder under the root directory of the project. This article is fr

When the image size is too large or the number of images is too large, BitmapFactory decoding will produce java. lang. outOfMemoryError: bitmap size exceeds VM budget. To use it properly, you need to allocate less memory. The specific solution is to modify the sample value BitmapFactory. options. inSampleSize, for example, www.2cto.com BitmapFactory. Options opts = new BitmapFactory. Options ();Opts. inSamp

Java. lang. ClassCastException: android. widget. FrameLayout $ LayoutParams cannot be cast to android. widget. LinearLayout $ LayoutParams The parent control of FrameLayout is a LinearLayout control. The problem is that when LinearLayout allocates space for the Child control, the LayoutParams for retrieving FrameLayout must be LinearLayout. LayoutParams, rather than FrameLayout. LayoutParams. Relati