java lang nullpointerexception java

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My exceptions-java. lang. NullPointerException, nullpointerexception

My exceptions-java. lang. NullPointerException, nullpointerexception I believe everyone is very familiar with this exception. I believe that everyone has met this exception in their programming career. During the development of 3.1 of colleges and universities, such errors were thrown out again. This is a small bug, bu

Solve the Problem of java. lang. NullPointerException in Eclipse in cocos2d-x3.2, java. lang. exception

Solve the Problem of java. lang. NullPointerException in Eclipse in cocos2d-x3.2, java. lang. exception Error 1 Analysis: java. lang. NullPoin

Java. lang. NullPointerException java. lang. Double. parseDouble

Java. lang. NullPointerException:1: java. lang. Double. parseDoubleJava codeJava. lang. NullPointerExceptionSun. misc. FloatingDecimal. readJavaFormatString (FloatingDecimal. java: 991)

Java NULL pointer exception (Java. Lang. nullpointerexception)

When any method is called for a null pointer in Java, a null pointer exception (Java. Lang. nullpointerexception) is thrown ). Null Pointer exceptions are definitely the most difficult to find and debug in Java, and you will never get any useful debugging information. Summar

Activity_main.xml: java. lang. NullPointerException, father of java

Activity_main.xml: java. lang. NullPointerException, father of java 1. Error description eclipse.buildId=4.4.0.I20140606-1215java.version=1.7.0_67java.vendor=Oracle CorporationBootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=zh_CNFramework arguments: -product org.eclipse.epp.package.jee.productCommand-line a

Analysis of Java. Lang. nullpointerexception

Analysis of Java NULL pointer exceptions (1) The Java language has an "exception mechanism" to handle special cases in the program. For example, if the divisor is zero, it is an "exception ".The NULL pointer exception java. Lang. nullpointerexception is a common exception.

ZendStudioforEclipse's java. lang. NullPointerException error resolutionphp tutorial

ZendStudioforEclipse's java. lang. NullPointerException solution. Of course, this item is very memory-consuming and will not be recommended for configuration. recently, I found that this error occurs when ZendStudioforEclipse is enabled after the PHP project is created. Aninterna is very memory-consuming, and it is not recommended if the configuration is almost c

Difficult installation of Aptana plug-in (continued)-the failure to start myeclipse and the failure to report java. Lang. nullpointerexception

If it is reproduced, please describe the source! Http://blog.csdn.net/xukunddp I was frustrated when I wrote my blog in the previous article. Although I knew the steps for installing Aptana, the results were not satisfactory. There were still some problems with using Aptana, which were not solved by many people on the Internet. The first problem is that myeclipse cannot be started every time it is opened. You have to delete Org. eclipse. update or Org. eclipse. the osgi folder can be used t

Null pointer error java. lang. NullPointerException

empty string, it is a null object .), The println method of the out object cannot directly operate on the null object. Therefore, the JSP page where code segment 1 is located will throw a "java. lang. NullPointerException" exception.Even if the Object may be empty, some methods of java.

Null Pointer (Java. Lang. nullpointerexception)

When any method is called for a null pointer in Java, a null pointer exception (java. lang. NullPointerException) is thrown ). Null Pointer exceptions are definitely the most difficult to find and debug in Java, and you will never get any useful debugging information. Summar

Severe: exception starting filter struts2 java. Lang. nullpointerexception

Severe: exception starting filter struts2 Java. Lang. nullpointerexception At com. opensymphony. xwork2.util. filemanager $ filerevision. needsreloading (filemanager. Java: 209) At com. opensymphony. xwork2.util. filemanager. fileneedsreloading (filemanager. Java: 60) At com

Exception starting filter struts2 java. Lang. nullpointerexception

A small struts2 program debugging fails after devmodel is changed to true, Severe: exception starting filter struts2Java. Lang. nullpointerexceptionAt com. opensymphony. xwork2.util. filemanager $ filerevision. needsreloading (filemanager. Java: 209)At com. opensymphony. xwork2.util. filemanager. fileneedsreloading (filemanager. Java: 60)At com. opensymphony. x

JsonMappingException: (was java. lang. NullPointerException)

JsonMappingException: (was java. lang. NullPointerException)An exception is reported when java objects are serialized using jackson: com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: com.chanjet.gov.Student["age"]) at com.fasterxml.jackson.databind.Js

Org. w3c. dom. ls. LSException: java. lang. NullPointerException, Chinese programming

Org. w3c. dom. ls. LSException: java. lang. NullPointerException, Chinese programming Operating Environment: OS: WIN 10.0.14393 x64 family Edition JDK: JavaSE 1.5.0 _ 20 i586 Tomcat: 6.0.48 win32 ----------------------------------------------------------------- Procedure: Run startup. bat to start Tomcat. ----------------------------------------------------------

Java. lang. NullPointerException, pointerexception when listView. getChildAt (I)

Java. lang. NullPointerException, pointerexception when listView. getChildAt (I) BaseAdapter returns the component that can display the number of items on the current screen. Therefore, it uses listView. getChildAt (I ); The returned result is a widget that can be displayed on the current screen. You cannot use the listView. getChildAt (I) method to retrieve widg

Java. Lang. nullpointerexception: module 'null' not found

Today, when I was working on struts, I encountered the java. Lang. nullpointerexception: module 'null' not found error. I was depressed for a long time, The Web. xml file is not configured./WEB-INF/struts-config2.xml If this problem occurs, try this method! It is inconvenient to change eclipse, and it is inconvenient to find the struts plug-in 3.1.2. I still thin

Exception in thread "housekeeper" java. Lang. nullpointerexception

When the proxool connection pool is used to restart the Tomcat container Exception in thread "Housekeeper" Java. Lang. nullpointerexception Null Pointer Exception error. The reason is:Write this is because proxool is not being Shutdown properly. if the JVM stops then proxool tables that and shuts down gracefully, But if you redeploy proxool into some environme

Java. lang. NullPointerException at com. example. phone. MainActivity. onCreate

Write an android dial and run the following error: 04-09 01:36:33. 880: E/AndroidRuntime (3689): Caused by: java. lang. NullPointerException04-09 01:36:33. 880: E/AndroidRuntime (3689): at com. example. phone. MainActivity. onCreate (MainActivity. java: 30) I haven't found any answers online for a long time. The Code is as follows: 1 package com. example. phone;

Error series for Android development (1), java. lang. NullPointerException, at android. widget. ListView. setupChild, appwidgetlistview

Error series for Android development (1), java. lang. NullPointerException, at android. widget. ListView. setupChild, appwidgetlistview Problem description: The Running code reports a null pointer error, java. lang. NullPointerException

M2eclipse java. Lang. nullpointerexception

An error is reported when you use m2eclipse to import an existing Maven project. Java. Lang. nullpointerexceptionAt org. Apache. Maven. plugin. defaultindescriptorcache $ cachekey. At org. Apache. Maven. plugin. defaultindescriptorcache. createkey (defaultplugindescriptorcache. Java: 62)At org. Apache. Maven. plugin. Internal. defaultmavenpluginmanager. getplugi

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