Most viewed questions in Java

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Sorted array is being processed faster than unsorted array. Why is it so ?

What is Branch Prediction? Consider a railroad junction: Image by ...READ MORE

Apr 18, 2018 in Java by Rishabh
 • 3,620 points • 947 views
0 votes
1 answer

Difference between Instance Variable and Class Variable

A variable defined within a block or ...READ MORE

Mar 12, 2019 in Java by Reema
 • 945 views
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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
 • 82,880 points • 941 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
 • 82,880 points • 941 views
0 votes
1 answer

How to connect Java to MySql Database?

This will work: try { ...READ MORE

Aug 27, 2019 in Java by John
 • 937 views
0 votes
1 answer

How to fire and handle HTTP requests

There are 2 options you can go ...READ MORE

Jun 13, 2018 in Java by Rishabh
 • 3,620 points • 936 views
0 votes
0 answers

how to solve thread-cannot find symbol

Feb 11, 2019 in Java by anonymous
 • 933 views
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2 answers

How to sort array in descending order

there are some traditional ways that you ...READ MORE

Jul 4, 2018 in Java by Priyaj
 • 58,090 points • 933 views
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3 answers

Is there any goto statement in java?

So they could be used one day ...READ MORE

Oct 15, 2018 in Java by Daisy
 • 8,120 points • 930 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
 • 82,880 points • 928 views
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1 answer

what are the ways in which a list can be iterated

  There are 5 ways to iterate over ...READ MORE

Apr 23, 2018 in Java by sharth
 • 3,370 points • 928 views
0 votes
2 answers

Does Java allow to create static classes?

Java has "static nested classes", but they ...READ MORE

Sep 5, 2018 in Java by Sushmita
 • 6,910 points • 926 views
0 votes
1 answer

How to divide a string in two parts

String s="yourstring"; boolean flag = true; for(int i=0;i<s.length();i++) { ...READ MORE

Apr 13, 2018 in Java by Rishabh
 • 3,620 points • 925 views
0 votes
1 answer

Why do we use threads in Java?

Reasons for using Multithreading in Java: When a ...READ MORE

Nov 2, 2018 in Java by nsv999
 • 5,500 points • 924 views
–1 vote
1 answer

What is the difference between oracle JDK and open JDK

Both OpenJDK and Oracle JDK are created ...READ MORE

Jul 10, 2018 in Java by Akrati
 • 3,190 points • 923 views
0 votes
1 answer

Default Constructor in Java

Well, none of these is the default ...READ MORE

Jun 19, 2018 in Java by geek.erkami
 • 2,680 points • 922 views
0 votes
2 answers

How can I sort values of a Map in Java using its key

Assuming TreeMap is not good for you ...READ MORE

Oct 10, 2018 in Java by Sushmita
 • 6,910 points • 920 views
0 votes
1 answer

Merge two array in Java

This is very simple, you need an ...READ MORE

Mar 11, 2019 in Java by Esha Gupta
 • 915 views
0 votes
1 answer

What do you mean by Socket Programming?

Socket programming is a way of connecting two ...READ MORE

Jul 14, 2019 in Java by Frankie
 • 9,830 points • 914 views
0 votes
1 answer

What is the difference between Runnable and extends Thread

Runnable is the preferred way to create ...READ MORE

May 1, 2018 in Java by sharth
 • 3,370 points • 911 views
+1 vote
1 answer

how to print this statement in java print(' '*(r-x-1)+'*'*(2*x+1)) ( logic used in python .its perfect) but java wrong output came

In ' '*(r-x-1) and '*'*(2*x+1), you used multiplication ...READ MORE

Dec 22, 2019 in Java by Utsab Bandyopadhyay
 • 910 views
0 votes
1 answer

Is there any difference between ConcurrentHashMap and Collections.synchronizedMap?

ConcurrentHashMap: It allows concurrent modification of the ...READ MORE

Dec 26, 2018 in Java by Sushmita
 • 6,910 points • 909 views
0 votes
1 answer

Can Abstract Class have a Constructor?

Yes, an abstract class can have a ...READ MORE

May 11, 2018 in Java by sharth
 • 3,370 points • 909 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
 • 65,910 points • 907 views
0 votes
1 answer

How do I break out of nested loops in Java?

You can use break with a label for the ...READ MORE

Mar 13, 2019 in Java by trisha
 • 907 views
0 votes
1 answer

What is composition in Java?

Composition is again specialized form of Aggregation ...READ MORE

Feb 18, 2019 in Java by Neha
 • 6,300 points
edited Feb 18, 2019 by Neha • 906 views
+4 votes
1 answer

How to print the individual occurance of elements in Java?

You can use a HashMap to serve ...READ MORE

Dec 4, 2018 in Java by Priyaj
 • 58,090 points • 901 views
0 votes
1 answer

How to run the JAR files in windows?

Following are the steps to run the ...READ MORE

May 28, 2018 in Java by Parth
 • 4,630 points • 901 views
0 votes
1 answer

Create Buttons in Java Swing

First, you will have to create a ...READ MORE

Aug 27, 2019 in Java by Esha
 • 898 views
0 votes
1 answer

In which class is the "length" property of array defined ?

It's defined in the Java language specification: The members ...READ MORE

May 8, 2018 in Java by Rishabh
 • 3,620 points • 897 views
0 votes
1 answer

How to use wait() and notify() concept in producer consumer situation

In this program, we have two threads ...READ MORE

Jul 20, 2018 in Java by Kalgi
 • 52,360 points • 896 views
0 votes
1 answer

Check whether the string is palindrome or not?

You may refer the below code: public static ...READ MORE

Jul 11, 2018 in Java by Akrati
 • 3,190 points • 894 views
0 votes
1 answer

difference between wait() and sleep() in java

We can find a big difference between ...READ MORE

Apr 26, 2018 in Java by developer_1
 • 3,320 points • 885 views
+1 vote
3 answers

How to convert a List to an Array in Java?

Either: Foo[] array = list.toArray(new Foo[list.size()]); or: Foo[] array = ...READ MORE

Aug 7, 2018 in Java by Akrati
 • 3,190 points • 884 views
0 votes
1 answer

What is object cloning in Java?

Object cloning means to create an exact ...READ MORE

Nov 29, 2018 in Java by Frankie
 • 9,830 points • 881 views
0 votes
3 answers

How to sort an array in java?

import java.util.Arrays; public class Sort { ...READ MORE

Aug 24, 2018 in Java by Parth
 • 4,630 points • 881 views
0 votes
1 answer

How to change selection listener in JComboBox?

It should respond to ActionListeners, like this: combo.addActionListener (new ...READ MORE

Nov 15, 2018 in Java by Frankie
 • 9,830 points • 876 views
0 votes
1 answer

How can I check for "undefined" in JavaScript?

If you are interested in finding out ...READ MORE

Feb 22, 2022 in Java by Aditya
 • 7,680 points • 872 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
 • 52,360 points • 872 views
0 votes
1 answer

Comparable vs Comparator in Java

I think you are not alone who is ...READ MORE

May 11, 2018 in Java by code.reaper12
 • 3,500 points • 870 views
0 votes
1 answer

Is it possible to upload a file from desktop to web using Selenide?

Hi, @Nikhil, Yes it's possible to drop a ...READ MORE

Dec 16, 2020 in Java by Gitika
 • 65,910 points • 869 views
0 votes
2 answers

What are all the different ways to create an object in Java?

There are different ways you could do this ...READ MORE

Aug 19, 2019 in Java by Sirajul
 • 59,230 points • 869 views
0 votes
1 answer

How to encode data using Base64 in Java?

import org.apache.commons.codec.binary.Base64; We can not use sun.* packages ...READ MORE

May 30, 2018 in Java by Sushmita
 • 6,910 points • 866 views
0 votes
0 answers

How to convert an Object {} to an Array [] of key-value pairs in JavaScript

I'd want to transform the following object: {"1":5,"2":7,"3":0,"4" ...READ MORE

Sep 28, 2022 in Java by Nicholas
 • 7,760 points • 865 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 • 865 views
0 votes
1 answer

Static methods can't be abstract in Java

Well, Java doesn't allow this because of ...READ MORE

Oct 12, 2018 in Java by v.liyyah
 • 1,300 points • 865 views
0 votes
2 answers

When to use LinkedList and ArrayList in Java?

ArrayList is what you want. LinkedList is almost always a ...READ MORE

Dec 11, 2018 in Java by Sushmita
 • 6,910 points • 862 views
0 votes
2 answers

Integer to String conversion in java

We can do this in 2 ways: String ...READ MORE

Jul 28, 2018 in Java by samarth295
 • 2,220 points • 855 views
0 votes
1 answer

How to get the windows native look in Java GUI programming?

Hello Kartik,  You can try the syntax: UIManager.setLookAndFeel(PLAF); (Pluggable ...READ MORE

May 7, 2020 in Java by Niroj
 • 82,880 points • 854 views
0 votes
2 answers

Reading an InputStream & coverting it into a String in Java?

Apache Commons allows: String myString = IOUtils.toString(myInputStream, "UTF-8"); And ...READ MORE

Aug 30, 2019 in Java by Karan
 • 19,610 points • 850 views
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