Trending questions in Java

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1 answer

What are the different methods of session management in servlets?

Session is a conversational state between client ...READ MORE

Feb 18, 2019 in Java by Frankie
 • 9,830 points • 20,520 views
+1 vote
1 answer

How to get Alias name of AWS Lambda function from java code?

Hey @Abhishek, you could probably use the ...READ MORE

Apr 1, 2020 in Java by Sirajul
 • 59,190 points • 2,802 views
0 votes
1 answer

How to call setUndecorated() after a frame is made visible?

Hello kartik, You can Try: dispose(); setUndecorated(true); setVisible(true); Check it Out. Hope ...READ MORE

Apr 21, 2020 in Java by Niroj
 • 82,800 points • 1,922 views
0 votes
1 answer

How to open warning/information/error dialog in swing?

Hello, You can try out : import javax.swing.JFrame; import javax.swing.JOptionPane; public ...READ MORE

Apr 21, 2020 in Java by Niroj
 • 82,800 points • 1,697 views
0 votes
2 answers

What is immutable string in java?

To answer your question, the String is ...READ MORE

Feb 9, 2022 in Java by Soham
 • 9,730 points • 1,331 views
0 votes
1 answer

How to implement draggable tab using Java Swing?

Hello kartik, setAcceptor(TabAcceptor a_acceptor) should let the consumer code ...READ MORE

Apr 21, 2020 in Java by Niroj
 • 82,800 points • 1,663 views
–1 vote
0 answers

Is there anyone who knows well about android app studio and can build an app? I have a very good idea want to develop an app, need your help, if u can help me please leave a message [closed]

May 8, 2020 in Java by Pooja
 • 110 points
closed May 8, 2020 by Sirajul • 1,005 views
0 votes
1 answer

How to set JFrame to appear centered, regardless of monitor resolution?

Hello kartik, You can  always did it in ...READ MORE

May 7, 2020 in Java by Niroj
 • 82,800 points • 890 views
0 votes
1 answer

How to add tabs to JTabbedPane using WindowBuilder?

Hii, You can just find out by given ...READ MORE

Apr 21, 2020 in Java by Niroj
 • 82,800 points • 1,527 views
0 votes
1 answer

Types of IOC containers in Spring Framework

There are basically two types of IOC ...READ MORE

Aug 28, 2018 in Java by misc.edu04
 • 1,450 points • 27,560 views
0 votes
1 answer

What Kind of Files IOC Container can Read other than XML directly or Indirectly?

Hi, @Ferry, The configuration metadata is nothing but bean ...READ MORE

Apr 23, 2020 in Java by Gitika
 • 65,730 points • 1,437 views
0 votes
1 answer

What is the reason for no ConcurrentHashSet against ConcurrentHashMap?

Hello, There's no built in type for ConcurrentHashSet because you ...READ MORE

Apr 8, 2020 in Java by Niroj
 • 82,800 points • 1,914 views
0 votes
2 answers

can i run two tomcat servers on the same linux VM machine?

Hello @Ganesh, To run and configure multiple instances ...READ MORE

Jul 30, 2020 in Java by Niroj
 • 82,800 points • 6,235 views
0 votes
1 answer

How can we activate JMX on my JVM for access with jconsole?

Hello @kartik, Run your java application with the ...READ MORE

Apr 9, 2020 in Java by Niroj
 • 82,800 points • 1,541 views
0 votes
2 answers

How do i create generic array in Java

as first tip you cannot assign value ...READ MORE

Feb 13, 2020 in Java by sama
 • 17,709 views
0 votes
0 answers

How to manage two JRadioButtons in java so that only one of them can be selected at a time?

How to manage two JRadioButtons in java ...READ MORE

Apr 21, 2020 in Java by kartik
 • 37,520 points • 1,013 views
0 votes
1 answer

How to run a Java program from the command line on Windows?

Hello @kartik, In case your Java class is ...READ MORE

Apr 9, 2020 in Java by Niroj
 • 82,800 points • 1,397 views
0 votes
1 answer

How could I implement autocompletion using Swing?

Hello, You can try out this: import java.awt.*; import java.awt.event.*; import ...READ MORE

Apr 21, 2020 in Java by Niroj
 • 82,800 points • 852 views
0 votes
1 answer

Error:“java.lang.OutOfMemoryError: Java heap space” ?

Hii, Possible causes: Simple configuration issue, where the specified ...READ MORE

Apr 8, 2020 in Java by Niroj
 • 82,800 points • 1,391 views
0 votes
1 answer

java path not found in window 7

Hey, You can follow these few steps: From the ...READ MORE

Apr 3, 2020 in Java by Gitika
 • 65,730 points • 1,557 views
0 votes
1 answer

How does Java convert integer value into byte?

When an integer value is converted into ...READ MORE

Feb 28, 2019 in Java by Avantika
 • 1,520 points
edited Feb 28, 2019 by Omkar • 18,762 views
0 votes
1 answer

Error: Unable to run mksdcard SDK tool in java?

Hello, If you use  Ubuntu, you can try: sudo apt-get ...READ MORE

Apr 9, 2020 in Java by Niroj
 • 82,800 points • 1,169 views
0 votes
1 answer

How to pass an object from one activity to another on Android?

Hello @kartik, Implement your class with Serializable. Let's ...READ MORE

Apr 8, 2020 in Java by Niroj
 • 82,800 points • 1,052 views
0 votes
0 answers

If statement not working in AWS Lamnda - S3Event code

Hi, I am using below  lambda function with ...READ MORE

Apr 4, 2020 in Java by Abhishek
 • 280 points • 1,236 views
0 votes
1 answer

Escaping strings in JSON

You can find a JSON library in your ...READ MORE

Oct 4, 2018 in Java by geek.erkami
 • 2,680 points • 24,869 views
0 votes
0 answers

Sir i already add the connector jar file to the EClipse IDE but still getting the error that driver not found my mysql service is already running on port 3306

READ MORE

Apr 1, 2020 in Java by GB
 • 120 points • 1,360 views
0 votes
0 answers

HOw can i do this?

The department of History has just bought ...READ MORE

Apr 16, 2020 in Java by MIH
 • 150 points • 681 views
0 votes
0 answers

Where exactly in the variable file path will I paste the javac file path?

I wrongly placed the javac file in ...READ MORE

Apr 2, 2020 in Java by anonymous
 • 120 points • 1,157 views
0 votes
1 answer

how to do global variable declaration in java

Hello,​ Global varriable which is defined after the ...READ MORE

Apr 3, 2020 in Java by Niroj
 • 82,800 points • 1,057 views
0 votes
2 answers

How to convert List<Integer> to int[] in Java?

In addition to Commons Lang, you can ...READ MORE

Aug 20, 2019 in Java by Sirajul
 • 59,190 points • 17,060 views
+1 vote
2 answers

Calculating date/time difference in Java

We can also use java.util.concurrent.TimeUnit class. long diff = d2.getTime() ...READ MORE

Aug 28, 2018 in Java by Sushmita
 • 6,920 points • 27,457 views
+1 vote
1 answer

How to generate a class at runtime in Java?

Yes: you can do it with Burningwave ...READ MORE

Mar 16, 2020 in Java by Roberto
 • 460 points
edited Apr 14, 2020 by Roberto • 1,501 views
+2 votes
2 answers

How to connect to Oracle using Service Name instead of SID?

HII.. I hope this information may help you- Thin-style ...READ MORE

Sep 29, 2020 in Java by SRI
 • 10,645 views
0 votes
1 answer

What is Modeshape. How can i use this?

ModeShape is an open-source implementation of the JSR-283 specification and ...READ MORE

Mar 30, 2020 in Java by Gitika
 • 65,730 points • 1,266 views
0 votes
2 answers

how can we Create instance for generic type in java

private static class SomeContainer<E> { ...READ MORE

Aug 27, 2018 in Java by Sushmita
 • 6,920 points • 27,494 views
0 votes
1 answer

How to solve this error: No Persistence provider for EntityManager named

After <persistence-unit name="agisdb">, define the persi ...READ MORE

Jan 8, 2019 in Java by Daisy
 • 8,140 points • 19,825 views
0 votes
3 answers

How autowiring works in Spring?

First, and most important - all Spring ...READ MORE

Jan 11, 2019 in Java by developer_1
 • 3,350 points • 19,321 views
0 votes
0 answers

How to handle simultaneous requests using springboot?

A gateway and load balancer built using ...READ MORE

Feb 9, 2020 in Java by anonymous
 • 19,550 points • 2,022 views
0 votes
1 answer

Importing classes in JSP

Use Page Directive to import a Class ...READ MORE

May 25, 2018 in Java by Rishabh
 • 3,620 points • 28,961 views
+1 vote
0 answers

I am getting below error "The method readerFor(Class<Map>) is undefined for the type CsvMapper"

I Have requirement to convert csv to ...READ MORE

Dec 29, 2019 in Java by anonymous
 • 160 points • 3,728 views
+2 votes
3 answers

Listing all the subclasses of a specific class in Java

Try with BurningWave core library. Here an ...READ MORE

Dec 29, 2019 in Java by anonymous
 • 460 points
edited Jan 9, 2020 by anonymous • 15,724 views
0 votes
1 answer

How can I get the current date and time in UTC or GMT in Java?

This definitely returns UTC time: as String ...READ MORE

Jun 7, 2018 in Java by Rishabh
 • 3,620 points • 28,095 views
0 votes
1 answer

Why is my Spring @Autowired field null?

If you are not coding a web ...READ MORE

Dec 27, 2018 in Java by Daisy
 • 8,140 points
edited Mar 4, 2022 by Sarfaraz • 19,310 views
0 votes
1 answer

Java execute vs executeQuery vs executeUpdate

I think the major differences between execute, executeQuery, ...READ MORE

Jul 31, 2018 in Java by geek.erkami
 • 2,680 points • 25,433 views
0 votes
2 answers

How to ignore exception in Java?

There is no way to basically ignore a ...READ MORE

Aug 16, 2019 in Java by Sirajul
 • 59,190 points • 13,618 views
+2 votes
0 answers

How can I assign unicode to a variable in JavaScript, but have the script then populate a PDF field not in the unicode, but in the Chinese characters the unicode represents?

Here is the code I am using. ...READ MORE

Jan 13, 2020 in Java by anonymous
 • 140 points • 2,144 views
+1 vote
0 answers

getting below error when trying to conver csv file to json :The method readerFor(Class<Map>) is undefined for the type CsvMapper [closed]

PFB source code: import java.io.File; import java.lang.*; import java.util.Arrays; import java.util.List; import ...READ MORE

Dec 29, 2019 in Java by anonymous
 • 160 points
closed Jan 14, 2020 by Kalgi • 2,406 views
+1 vote
1 answer

Program for nth prime number without using scanner

Hi @Sneha, you could use something like ...READ MORE

Jan 13, 2020 in Java by Kalgi
 • 52,340 points • 1,683 views
+2 votes
1 answer

please someone tell the code to launch an instance in digital ocean using java

In order to create a digital ocean ...READ MORE

Jan 14, 2020 in Java by Sirajul
 • 59,190 points • 1,497 views
0 votes
2 answers

In Java, what is the best way to determine the size of an object?

I happened to find a java class "jdk.nashorn.internal.ir.debug.ObjectSizeCalculator", ...READ MORE

Aug 19, 2019 in Java by Sirajul
 • 59,190 points • 13,716 views
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