Trending questions in Java

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How to use nested class in Java?

This program will help you understand the ...READ MORE

Mar 3, 2019 in Java by Priyaj
 • 58,020 points • 601 views
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1 answer

Lazy Initialization Error in Java

What is wrong here is that your ...READ MORE

Jan 14, 2019 in Java by developer_1
 • 3,350 points • 2,564 views
+1 vote
1 answer

Error: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2

Hello @Jino, It is just a JVM bug ...READ MORE

Nov 21, 2018 in Java by Nabarupa
 • 4,827 views
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1 answer

How to parse date string to Date?

The pattern is wrong. You have a ...READ MORE

Oct 29, 2018 in Java by Daisy
 • 8,140 points • 5,858 views
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1 answer

How to convert a date string to a DateTime object using Joda Time library?

DateTimeFormatter formatter = DateTimeFormat.forPattern("dd/MM/yyyy HH:mm:ss"); DateTime dt = ...READ MORE

Jan 9, 2019 in Java by Daisy
 • 8,140 points • 2,709 views
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2 answers

How can I convert an 'ArrayList<String> to 'String[]' in Java

In Java 8 or later: String listString = ...READ MORE

Aug 20, 2019 in Java by Sirajul
 • 59,230 points • 3,489 views
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2 answers

How to convert an int array to string using tostring method in java?

Use java.util.Arrays: String res = Arrays.toString(array); System. ...READ MORE

Aug 16, 2019 in Java by Sirajul
 • 59,230 points • 2,514 views
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1 answer

Where do we get the maven dependency code for Spring Beans?

Don't worry, you can just go through ...READ MORE

Jan 9, 2019 in Java by Frankie
 • 9,830 points • 2,627 views
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1 answer

What is @ModelAttribute in Spring MVC?

@ModelAttribute refers to a property of the ...READ MORE

Dec 18, 2018 in Java by Daisy
 • 8,140 points • 3,537 views
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How execute JSP web page in Intellij

Hi all, I am new to java and ...READ MORE

Jan 24, 2019 in Java by Abraham
 • 120 points
edited Jul 11, 2023 by Khan Sarfaraz • 1,994 views
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1 answer

$ in a variable name in Java

Java compiler uses "$" symbol internally to decorate ...READ MORE

Oct 10, 2018 in Java by code.reaper12
 • 3,500 points • 6,543 views
0 votes
1 answer

What do you mean by aggregation in Java?

Aggregation is a specialized form of Association ...READ MORE

Feb 18, 2019 in Java by Frankie
 • 9,830 points • 881 views
0 votes
1 answer

“Unable to load native-hadoop library for your platform” warning: How to resolve it?

If you are running Hadoop on 64bit CentOS, ...READ MORE

Jan 4, 2019 in Java by Daisy
 • 8,140 points • 2,789 views
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how to solve thread-cannot find symbol

Feb 11, 2019 in Java by anonymous
 • 1,141 views
0 votes
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Xml to Json Conversion

To convert XML File in to JSON ...READ MORE

Jan 10, 2019 in Java by developer_1
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What is the difference between Default and Protected access specifiers?

Can anyone explain in brief as what ...READ MORE

Feb 6, 2019 in Java by Dishantu
 • 1,339 views
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2 answers

How can I invoke a method when the method name is in the form of a given string?

You could probably use method invocation from reflection: Class<?> ...READ MORE

Aug 19, 2019 in Java by Sirajul
 • 59,230 points • 3,219 views
0 votes
1 answer

USing Java App to create Windows Service

Apache Commons Daemon is a good alternative. It ...READ MORE

Feb 1, 2019 in Java by developer_1
 • 3,350 points • 1,404 views
0 votes
2 answers

How do I get the current date and time using Java?

If you require a time stamp in ...READ MORE

Aug 23, 2019 in Java by Sirajul
 • 59,230 points • 3,274 views
0 votes
1 answer

How is inheritance in C++ different than that in Java?

The purpose of inheritance is same for ...READ MORE

Feb 6, 2019 in Java by Priyaj
 • 58,020 points • 1,113 views
0 votes
2 answers

Unfortunately MyApp has stopped. How do I solve this?

The common solution for solving App has ...READ MORE

Mar 6, 2019 in Java by AllisonE
 • 180 points • 1,322 views
0 votes
1 answer

Why clone() method is protected in Java?

The clone() is protected because it is ...READ MORE

Nov 13, 2018 in Java by geek.erkami
 • 2,680 points • 4,758 views
0 votes
2 answers

How can we convert java.util.Date to java.sql.date in Java?

It's easy to convert a java.util.Date object ...READ MORE

Aug 27, 2019 in Java by Sirajul
 • 59,230 points • 1,421 views
0 votes
1 answer

simple HTTP server in Java using only Java SE API

The com.sun.net.httpserver solution is not portable across JREs. Its ...READ MORE

Jan 4, 2019 in Java by Daisy
 • 8,140 points • 2,450 views
0 votes
1 answer

Static Map initialization in Java

I would suggest you to use the ...READ MORE

May 4, 2018 in Java by Akrati
 • 3,190 points • 13,014 views
0 votes
1 answer

web.xml file is missing in my eclipse IDE

Very simple. You will find Deployment Descriptor ...READ MORE

Nov 27, 2018 in Java by Omkar
 • 69,220 points • 4,063 views
0 votes
1 answer

String mapping without Case-Sensitivity

Yes, contains is case sensitive. You can ...READ MORE

Feb 5, 2019 in Java by developer_1
 • 3,350 points • 1,044 views
0 votes
1 answer

Why Object is Super Class in Java?

Object is an exception to the first rule, ...READ MORE

Feb 7, 2019 in Java by Dheeraj
 • 955 views
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2 answers

How to convert a java string into byte array

Try using String.getBytes(). It returns a byte[] ...READ MORE

Aug 22, 2019 in Java by Sirajul
 • 59,230 points • 1,593 views
0 votes
1 answer

Evaluating a math expression given in string form

import javax.script.ScriptEngineManager; import javax.script.ScriptEngine; import javax.script.ScriptException; public class Test { ...READ MORE

Oct 12, 2018 in Java by Daisy
 • 8,140 points • 5,969 views
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2 answers

how to increase heap size in java?

Here is how you can increase the ...READ MORE

Aug 23, 2019 in Java by Sirajul
 • 59,230 points • 2,023 views
0 votes
1 answer

Aligning Diagram in Java

Without any evidence otherwise, I'd guess you've over-ridden the paint method ...READ MORE

Feb 11, 2019 in Java by developer_1
 • 3,350 points • 634 views
0 votes
1 answer

Sending Email in Android using JavaMail API without using the default/built-in app

Send e-mail in Android using the JavaMail ...READ MORE

Dec 4, 2018 in Java by Daisy
 • 8,140 points • 3,597 views
0 votes
2 answers

Get all the permutations of a string in Java

You could use recursion to do this.  Try ...READ MORE

Aug 21, 2019 in Java by Sirajul
 • 59,230 points • 2,364 views
0 votes
2 answers

How to parse/format dates with LocalDateTime? (Java 8)

Converting LocalDateTime to Time Zone ISO8601 String LocalDateTime ...READ MORE

Dec 6, 2018 in Java by Sushmita
 • 6,920 points • 4,646 views
0 votes
1 answer

String related Hash Functions

Usually hashes wouldn't do sums, otherwise stop and pots will have ...READ MORE

Feb 5, 2019 in Java by developer_1
 • 3,350 points • 774 views
+2 votes
1 answer

How to import an existing x509 certificate and private key in Java keystore to use in SSL?

keytool does not provide such basic functionality ...READ MORE

Dec 19, 2018 in Java by Daisy
 • 8,140 points • 2,732 views
0 votes
1 answer

How to resolve the error: could not find or load main class?

If you are getting error: could not ...READ MORE

May 28, 2018 in Java by Parth
 • 4,640 points • 11,658 views
0 votes
2 answers

Is there any way to declare an array in-line?

Another way to do that, if you ...READ MORE

Aug 30, 2019 in Java by Sirajul
 • 59,230 points • 659 views
0 votes
2 answers

How to play .mp3 and .wav in Java?

We can use Java API to play ...READ MORE

Dec 7, 2018 in Java by Sushmita
 • 6,920 points • 6,405 views
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Creating a JUnit Test Suite Class

To create a test suite we will use the ...READ MORE

Jan 17, 2019 in Java by Frankie
 • 9,830 points • 1,267 views
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2 answers

How can I convert a String variable to a primitive int in Java

 Here are two ways illustrating this: Integer x ...READ MORE

Aug 20, 2019 in Java by Sirajul
 • 59,230 points • 2,548 views
0 votes
2 answers

Reserving space for a heap object

Run the JVM with -XX:MaxHeapSize=512m (or any big number ...READ MORE

Aug 26, 2019 in Java by Sirajul
 • 59,230 points • 1,350 views
+1 vote
2 answers

Is there a code to find 64-bit JVM or 32-bit JVM (from within a program)?

Do I need to understand the difference ...READ MORE

Jun 11, 2019 in Java by Jim
 • 810 points • 2,443 views
0 votes
1 answer

Can I help with the gradle code for AspectJ?

You can go to maven repositories https://mvnrepository.com/artifact/org.aspectj/aspectjtools/1.9.2 ...READ MORE

Jan 9, 2019 in Java by Frankie
 • 9,830 points • 1,488 views
0 votes
1 answer

How can I run test methods in specific order in JUnit4?

@FixMethodOrder(MethodSorters.NAME_ASCENDING) public class SampleTest { ...READ MORE

Jan 7, 2019 in Java by Daisy
 • 8,140 points • 1,492 views
0 votes
2 answers

Does Java thread.sleep() puts swing ui to sleep?

You are correct about the code putting ...READ MORE

Oct 24, 2018 in Java by Sushmita
 • 6,920 points • 5,258 views
0 votes
1 answer

If The A Class Is Declared Without Any Access Modifiers, Where May The Class Be Accessed In Java Programming?

A class that is declared without any ...READ MORE

Nov 28, 2018 in Java by Frankie
 • 9,830 points • 3,133 views
0 votes
1 answer

How can we override back button to act like home button?

Most of the time you need to ...READ MORE

Dec 14, 2018 in Java by Daisy
 • 8,140 points • 2,426 views
0 votes
1 answer

Difference between FetchType LAZY and EAGER in Java Persistence API?

Sometimes you have two entities and there's ...READ MORE

Dec 5, 2018 in Java by Daisy
 • 8,140 points • 2,785 views
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