Recent questions tagged java

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java - Why does a new SimpleDateFormat object contain calendar with the wrong year?

I came upon a strange behavior that has left me curious and without a satisfactory explanation as yet. For ... the pieces all fit together. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Serializable subclass of non-serializable parent class

I am hitting a brickwall with serialization of a subclass of Location in android/java Location is not serializable. I have ... :262) .../... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to display a timer in a TextView in Android?

I want to set this textview: <TextView android:id="@+id/timer" android:layout_width="100dp" android:layout_height ... again" and restart timer. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Parser JSoup change the tags to lower case letter

I did some research and it seems that is standard Jsoup make this change. I wonder if there is a way to configure ... or some way to fix this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why/How is IntelliJ causing debug output in Netbeans?

Yesterday I was debugging a Java application with Netbeans. (i.e. the application was running with the debugger ... ) with the Ruby plugin. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Atlassian JIRA Plugin Development: How to make variables available to velocity templates

FAIR WARNING: this question is going to be pretty tough to answer unless you have experience with JIRA and have ... .summary}. Thanks! -Carl See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - apache POI exception in reading xlsx files

I'm using apache POI for reading xlsx files by adding below dependencies <dependency> <groupId>org.apache.poi</ ... the same exception.Any help? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - HibernateException: Found two representations of same collection

If I save an object containing the following list @OneToMany(cascade=CascadeType.ALL, mappedBy="taskList") @OrderColumn( ... wrong with my code? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I remove lambda expressions/method handles that are used as listeners?

Java 8 has introduced lambda expressions, which is a great thing. But now consider rewriting this code: class B implements ... = evt -> {}; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Difference in implementation of x = x + 1 and x++

My professor recently said that although x = x + 1 and x++ will obviously give the same result, there is a ... be different in those cases... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - native generator class in hibernate

I have this part of hibernate mapping xml file, and I was looking for a good example for what does native mean. ... in general :) Thank you! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I debug GlassFish 3 using Eclipse Helios?

I am using the GlassFish 3 server adapter with Eclipse Helios 3.6. I can start the server using the Servers view ... > asadmin start-domain myDomain and then creating a custom Deb...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Explain behaviors in mapping auto incremented composite id sequence with Hibernate

I have a table CREATE TABLE `SomeEntity` ( `id` int(11) NOT NULL AUTO_INCREMENT, `subid` int(11) NOT ... way without doing a column concat) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why does setBackground to JButton does not work?

I have the following simple code: btn = new JButton(); btn.setBackground(backgroundColor) I worked when I used: ... I do not know how. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I configure IntelliJ IDEA with JavaFX and scenebulider?

I'm trying to set up IntelliJ IDEA with screenbuilder and JavaFX and scenebuilder. I have both instealled, but ... me in the right direction? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android sqlite update table always return 0

I have seen several questions here related to updating in sqlite, but not able to solve this problem. I am ... I have also tried execSql() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Determining the extended interfaces of a Class

I need to determine if a Class object representing an interface extends another interface, ie: package a.b.c.d; ... whatever here } any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Does swing support *.ico files?

Setting an image for a swing action : Action action = ... // ImageIcon icon = new ImageIcon(getClass().getResource( ... jpg. Is this by design ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is it possible to configure JAX-RS method with variable number of URI parameters?

is it possible to configure GET method to read variable number of URI parameters and interpret them either as variable ... ; } Thanks in advance See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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571 views

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java - Iterate to find a Map entry at an index?

I have a LinkedHashMap. I want to get the Foo at index N. Is there a better way of doing this besides ... about 20 items in it. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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328 views

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java - How to set RequestConfiguration per request using RestTemplate?

I have a library which is being used by customer and they are passing DataRequest object which has userid, ... any better and optimized way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring AOP CGLIB proxy's field is null

Description Using the vlcj component, the custom component appears as a result of the AOP proxy object null. MediaList ... <- output null } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why we Pass String array as argument to main() method, why not any collection type or wrapper type or primitive type?

why is it mandatory to pass string arg[] as an argument in main method? why we cannot pass any other data type ... [] in main method in java? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to count uppercase and lowercase letters in a string?

yo, so im trying to make a program that can take string input from the user for instance: "ONCE UPON a time" and then ... (CharAt(i))){ } } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Using NetBeans 8 but getting below compilation error for Lambda expression

I am using NetBeans 8. When my code contains a Lambda expression and I try to compile, I get the following error ... --- (Alt-Enter shows hints) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Can I override a hidden (but public) method and call its super method?

There is a non public api that I need to override in order to workaround a quirk with Android's WebView. The ... call the super method? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What's an easy, quick way to reload a webapp in tomcat in dev environment?

I'm running Tomcat 6 on Windows. I've got the "Monitor Tomcat" system tray icon which allows me to start and ... this a bit quicker and nicer? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Unable to catch JsonMappingException

My IDE is giving me the error Unhandled Exception com.fasterxml.jackson.databind.JsonMappingException with the mapper. ... away. Any thoughts? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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