Ошибка Exception in thread «AWT-EventQueue-0

Помогите пожалуйста разобраться с ошибкой.

Connected.
clean
123
456
Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
at MainDebt.note(MainDebt.java:26)
at DebtWin$2.actionPerformed(DebtWin.java:76)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unk nown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unk nown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unk nown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unk nown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Ошибка Exception in thread «main» java.lang.NullPointerException
Возникает ошибка при запуске, что не так? Exception in thread «main».

Запуск «MineCraft.jar» — Exception in thread «main»
Что-то с Java приключилось на компе. ————————— Java Virtual Machine Launcher.

Exception in thread «main» java.lang.ArrayIndexOutOfBoundsException: 0
Вот кодpublic class fibo1 < int firstNum = 0, secondNum = 1, sum, len; public.

Исключение Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException

Подскажите, отчего выдается исключение при нажатии на кнопку.
Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
at lab5.AddDevice.jButton1MouseClicked(AddDevice.java:288)
at lab5.AddDevice.access$200(AddDevice.java:16)
at lab5.AddDevice$3.mouseClicked(AddDevice.java:119)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaste r.java:270)
at java.awt.Component.processMouseEvent(Component.java:6508)
at javax.swing.JComponent.processMouseEvent(JComponent.java:332 1)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container. java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.j ava:4501)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java: 4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2713)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Pro tectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Pro tectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:680)
at java.awt.EventQueue$4.run(EventQueue.java:678)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Pro tectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDis patchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispat chThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispat chThread.java:121)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java: 182)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java: 221)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java: 219)
at java.awt.Dialog.show(Dialog.java:1072)
at java.awt.Component.show(Component.java:1651)
at java.awt.Component.setVisible(Component.java:1603)
at java.awt.Window.setVisible(Window.java:1013)
at java.awt.Dialog.setVisible(Dialog.java:1003)
at lab5.Form.jButton1MouseClicked(Form.java:145)
at lab5.Form.access$100(Form.java:16)
at lab5.Form$2.mouseClicked(Form.java:69)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaste r.java:270)
at java.awt.Component.processMouseEvent(Component.java:6508)
at javax.swing.JComponent.processMouseEvent(JComponent.java:332 1)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container. java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.j ava:4501)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java: 4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2713)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
at java.awt.EventQueue.access$000(EventQueue.java:101)
at java.awt.EventQueue$3.run(EventQueue.java:666)
at java.awt.EventQueue$3.run(EventQueue.java:664)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Pro tectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Pro tectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:680)
at java.awt.EventQueue$4.run(EventQueue.java:678)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Pro tectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDis patchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispat chThread.java:128)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDis patchThread.java:117)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread. java:113)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread. java:105)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:90 )

Ошибка Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
Помогите пожалуйста package pr; import java.awt.EventQueue; import javax.swing.JFrame;.

Как исправить Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
Здравствуйте, я новичок в Java. Пишу программу для решения тестов. Суть программ в том, что по.

Exception in thread «AWT-EventQueue-0» java.lang.ArrayIndexOutOfBoundsException: 3
Здравствуйте, имеется программа моделирования автономной матричной линейной последовательности.

Exception in thread «AWT-EventQueue-0»
Появляется ошибка что где-то передается null значение, если я правильно понимаю. Но не могу понять.

Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException Error

Hello I’m a new programmer at an high school level as a result I do not know much about programming and am getting quite a few errors which have been resolved while others I completely do not understand. I am to make a simple Check Box selection program where the user gets to pick between a variety of choices and depending on their action the image changes. The program itself compiles perfectly but when I run it however it gives me some complications. Here is my program:

Well up to this part it runs smoothly and complies but when I proceed to run the program I get this error.

Might be a silly mistake however I cant seem to figure this out. Please Help and thank you

2 Answers 2

NullPointerException s are among the easier exceptions to diagnose, frequently. Whenever you get an exception in Java and you see the stack trace ( that’s what your second quote-block is called, by the way ), you read from top to bottom. Often, you will see exceptions that start in Java library code or in native implementations methods, for diagnosis you can just skip past those until you see a code file that you wrote.

Then you like at the line indicated and look at each of the objects ( instantiated classes ) on that line — one of them was not created and you tried to use it. You can start by looking up in your code to see if you called the constructor on that object. If you didn’t, then that’s your problem, you need to instantiate that object by calling new Classname( arguments ). Another frequent cause of NullPointerException s is accidentally declaring an object with local scope when there is an instance variable with the same name.

In your case, the exception occurred in your constructor for Workshop on line 75. means the constructor for a class. If you look on that line in your code, you’ll see the line

There are fairly clearly two objects on this line: denimjeansButton and this . this is synonymous with the class instance you are currently in and you’re in the constructor, so it can’t be this . denimjeansButton is your culprit. You never instantiated that object. Either remove the reference to the instance variable denimjeansButton or instantiate it.

Exception in thread “AWT-EventQueue-0” java.awt.IllegalComponentStateException: The frame is displayable

I have this java code:

All time this code results in the following exception:

I have tried my best. What is this? Even this exception is shown in console the output window appears. But this troubles when I’m trying to debug the code. I have goggled about this. But no solution found. Somebody please help me.

4 Answers 4

at the JDialog constructor:

I had the same problem trying to call .setUndecorated(true) after .pack(). So it should be not only before .setVisible(true), but also before .pack().

before you set that frame visible.

What I did for making it go fullscreen after being visible, I made a method just for initializing and making the frame visible, with a boolean parameter for fullscreen. In it, there was an if statement for if the boolean was true, to setUndecorated(true) and setExtendedState(JFrame.MAXIMIZED_BOTH) inside it. In a fullscreen method, I use frame.dispose() and then re-initialize it by calling the method with a true parameter, that way it will go fullscreen. This worked for me.

Not the answer you’re looking for? Browse other questions tagged java or ask your own question.

Linked

Related

Hot Network Questions

Subscribe to RSS

To subscribe to this RSS feed, copy and paste this URL into your RSS reader.

site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. rev 2021.4.16.39093

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.

Ошибка Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException

Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
at pr.dfse$2.actionPerformed(dfse.java:57)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unk nown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
at pr.dfse$2.actionPerformed(dfse.java:57)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unk nown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
at pr.dfse$2.actionPerformed(dfse.java:57)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unk nown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doInte rsectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Error Log (Прикрепленное изображение)
Спасибо!

Исключение Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
Подскажите, отчего выдается исключение при нажатии на кнопку. Exception in thread.

Как исправить Exception in thread «AWT-EventQueue-0» java.lang.NullPointerException
Здравствуйте, я новичок в Java. Пишу программу для решения тестов. Суть программ в том, что по.

Exception in thread «AWT-EventQueue-0» java.lang.ArrayIndexOutOfBoundsException: 3
Здравствуйте, имеется программа моделирования автономной матричной линейной последовательности.

у тебя переменная label, используемая в 57 строке, никогда не инициализируется.

а вообще учись анализировать стектрейс и пользоваться отладчиком

Заказываю контрольные, курсовые, дипломные и любые другие студенческие работы здесь или здесь.

Exception in thread «AWT-EventQueue-0»
Появляется ошибка что где-то передается null значение, если я правильно понимаю. Но не могу понять.

Что за ошибка «AWT-EventQueue-0» @1821 in group «main»: RUNNING
Здравствуйте. В программе на панели есть кнопка класса JButton, при нажатии на которую срабатывает.