Most voted questions in Java

+29 votes
3 answers

How can we set java.library.path in Eclipse?

Go into the library settings for your ...READ MORE

Jul 3, 2018 in Java by sharth
 • 3,370 points • 20,994 views
+16 votes
25 answers

How can I convert String to JSON object in Java?

Hi @Daisy You can use Google gson  for more ...READ MORE

Feb 7, 2019 in Java by Suresh
 • 720 points • 250,611 views
+12 votes
3 answers

How do I set or change the PATH system variable?

First make sure you have installed JDK ...READ MORE

Aug 28, 2018 in Java by slayer
 • 29,350 points • 977 views
+10 votes
13 answers

Default parameters of XMS and XMX in JVM

Run this code to see all the ...READ MORE

Nov 13, 2018 in Java by anonymous
 • 397,155 views
+7 votes
16 answers

Unable to resolve this error: "javac is not recognized as an internal or external command"

Check your javac path on Windows using Windows Explorer C:\Program Files\Java\jdk1.7.0_02\bin and ...READ MORE

May 23, 2018 in Java by Rishabh
 • 3,620 points • 457,619 views
+5 votes
4 answers

How to execute a python file with few arguments in java?

You can use Java Runtime.exec() to run python script, ...READ MORE

Mar 27, 2018 in Java by DragonLord999
 • 8,450 points
edited Nov 7, 2018 by Omkar • 79,497 views
+4 votes
0 answers

How to Download the Certificate for completion?

How Can I download the the Course ...READ MORE

Apr 17, 2020 in Java by Ajaaypranav
 • 180 points • 5,315 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 • 893 views
+4 votes
4 answers

Using while loop i want to print 10 even numbers

Hello @Nitesh, you are pretty much there. ...READ MORE

Nov 22, 2018 in Java by Priyaj
 • 58,090 points • 90,565 views
+4 votes
11 answers

How to import a jar file in Eclipse?

Click on File > Import. The Import ...READ MORE

Aug 23, 2018 in Java by Daisy
 • 8,120 points • 352,328 views
+4 votes
3 answers

What are the steps to set Java_home on Windows?

Set Java Home JAVA_HOME = C:\Program Files\Java\jdk1.7.0 [Location ...READ MORE

Sep 18, 2018 in Java by Sushmita
 • 6,910 points • 1,657 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
 • 59,230 points • 1,064 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 • 1,541 views
+2 votes
0 answers

How to add external Jar in modular JavaFX 11 project correctly?

I'm using Java 11 and JavaFX 11. ...READ MORE

Aug 8, 2019 in Java by invzbl3
 • 5,153 views
+2 votes
4 answers

Javac command not working in my windows 10

Check your javac path on Windows using Windows Explorer C:\Program Files\Java\jdk1.7.0_02\bin and ...READ MORE

Aug 6, 2019 in Java by Sirajul
 • 59,230 points • 50,660 views
+2 votes
2 answers

Can you give me the proper difference between java.util.Date vs java.sql.Date ?

As per Javadoc java.sql.Date is a thin wrapper around millisecond ...READ MORE

Aug 2, 2019 in Java by sampriti
 • 1,120 points • 14,747 views
+2 votes
1 answer

How to pass dynamic JSON request with parameter in POST request using Rest assured java?

here payload is short you can also ...READ MORE

Jul 23, 2020 in Java by Vivek
 • 19,311 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
 • 8,120 points • 2,395 views
+2 votes
1 answer

How do I ask the Selenium-WebDriver to wait for few seconds in Java?

There are two ways to wait: explicit ...READ MORE

Dec 19, 2018 in Java by Daisy
 • 8,120 points
edited Dec 19, 2018 by Daisy • 597 views
+2 votes
1 answer

What is the meaning of "this" keyword in Java?

public class MyThisTest { private int ...READ MORE

Oct 10, 2018 in Java by Daisy
 • 8,120 points • 660 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
 • 9,615 views
+2 votes
14 answers

Communications link failure: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException

Your exception seems to indicate that your ...READ MORE

Dec 11, 2020 in Java by Roshni
 • 10,520 points • 240,255 views
+2 votes
14 answers

“A Non-static method cannot be referenced from a static context” error

Hey Techies, Non-static variables are part of the objects ...READ MORE

Dec 10, 2020 in Java by Roshni
 • 10,520 points • 248,197 views
+2 votes
13 answers

Unable to execute jar- file: “no main manifest attribute”

add a jar/manifest/attributes setting like this: apply plugin: ...READ MORE

Nov 27, 2018 in Java by krishti
 • 214,058 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 • 13,052 views
+2 votes
10 answers

Convert Java Byte Array - String - Byte Array

Character Stream Vs Byte Stream Character oriented are ...READ MORE

Sep 25, 2018 in Java by carldivin
 • 180 points • 9,852 views
+1 vote
0 answers

What happens when we pass one invalid argument and valid argument to mvn command? Eg mvn clean -DskipTests -DNgbuild where -DNgbuild is invalid argument and -DskipTests is valid argument

I execute a command "Mvn clean -DskipTests ...READ MORE

Oct 11, 2021 in Java by anonymous
 • 130 points • 361 views
+1 vote
2 answers

How to find all the classes of a package in Java?

Looking on internet I found this page with ...READ MORE

Nov 16, 2020 in Java by Juan
 • 330 points • 347,587 views
+1 vote
1 answer

Multithreading in Java with priorities

HI, @Juan, By default, a thread inherits the priority of its parent thread. ...READ MORE

Nov 6, 2020 in Java by Gitika
 • 65,910 points • 2,100 views
+1 vote
1 answer

if i given invalid data how to get alert in selenium using java

Hello, Here is some of the method you ...READ MORE

Jul 20, 2020 in Java by Niroj
 • 82,880 points • 1,011 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
 • 59,230 points • 1,767 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 • 991 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 • 870 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 • 2,756 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 • 1,765 views
+1 vote
1 answer

Is Java a compiled language or interpreted?

Compiled languages are directly converted into machine ...READ MORE

Dec 18, 2019 in Java by Hannah
 • 18,570 points • 1,733 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
+1 vote
0 answers

output occurs but invisible immediately how to rectify this ?

public class evenodd { public static void main(String[] ...READ MORE

Oct 17, 2019 in Java by BIPLAB
 • 130 points • 652 views
+1 vote
1 answer

How to create database in MySql using Java?

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

Sep 30, 2019 in Java by Shri
 • 3,033 views
+1 vote
1 answer

How can I solve this example in an easy way??

You can use this code: import java.util.*; public class ...READ MORE

Sep 23, 2019 in Java by Omkar
 • 69,210 points • 605 views
+1 vote
1 answer

Adding Jar file to project

Changing the JRE System Library might work.  Right-click ...READ MORE

Sep 4, 2019 in Java by Esha
 • 2,517 views
+1 vote
0 answers

i open the spinner and can save document , but i am not able to save spinner information with my document in android, can u help?

Aug 28, 2019 in Java by DT
 • 130 points • 573 views
+1 vote
2 answers

Java: Nested Methods

public class ObjClass {     ObjClass anyMethod() ...READ MORE

Jan 19, 2020 in Java by zemiak
 • 12,580 views
+1 vote
1 answer

Facing "Unresolved compilation problem : Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ )" error when trying to launch firefox from selenium. Can anyone please help me

I think the problem is with this ...READ MORE

Jul 26, 2019 in Java by Venu
 • 3,738 views
+1 vote
0 answers

Initially autowired object has value,it becomes null after paging(using JSF 2.2 and spring 4.01.)

i'm trying to create basic crud operations ...READ MORE

Jul 5, 2019 in Java by swats
 • 1,511 views
+1 vote
1 answer

Can you please explain the difference between string, string buffer and string builder?

String are immutable where as StringBuffer and ...READ MORE

Jul 5, 2019 in Java by Akash
 • 160 points • 1,055 views
+1 vote
0 answers

How to install java on linux operating system? [closed]

I read good info about java here ...READ MORE

May 16, 2019 in Java by Vicky
closed May 16, 2019 by Vardhan • 503 views
+1 vote
1 answer

What are the types of memory in JVM?

The different types of Memory in JVM ...READ MORE

Mar 7, 2019 in Java by Priyaj
 • 58,090 points • 2,658 views
+1 vote
4 answers

How to take multiple integer input in one line using BufferedReader in Java?

To do this, we could read in ...READ MORE

Dec 14, 2020 in Java by Roshni
 • 10,520 points • 95,511 views
+1 vote
5 answers

How to take input using BufferedReader in Java?

yupp i am explaining every thing .. We ...READ MORE

Feb 1, 2020 in Java by Rohan
 • 180 points • 117,644 views
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