Trending questions in Java

+6 votes
11 answers

Default parameters of XMS and XMX in JVM

You use these Java command-line parameters to ...READ MORE

Nov 13, 2018 in Java by Murali
 • 66,813 views
+14 votes
18 answers

How can I convert String to JSON object in Java?

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

Feb 7 in Java by Suresh
 • 700 points • 64,738 views
+2 votes
12 answers

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

this method must be static so that it will exist even though the ...READ MORE

Jun 11 in Java by Neha
 • 330 points • 34,221 views
0 votes
10 answers

How to import a jar file in Eclipse?

Go to your project right click and ...READ MORE

Dec 10, 2018 in Java by Hola77
 • 32,107 views
+9 votes
11 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
 • 3,540 points • 22,502 views
+1 vote
11 answers

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

you mysql server instance is not running ...READ MORE

Jun 15 in Java by Encrypter Manyange
 • 14,040 views
+1 vote
11 answers

How to send HTTP POST requests on Java?

How to invoke Thread dump analysis API? Invoking ...READ MORE

Jun 16 in Java by Jim
 • 810 points
reshown Jun 17 by Vardhan • 13,012 views
+1 vote
10 answers

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

You Can Simply follow this step Create ...READ MORE

Dec 10, 2018 in Java by Sukesh
 • 15,362 views
0 votes
1 answer

What is Comparable in Java?

As the name itself suggests, Comparable is an interface which defines ...READ MORE

4 days ago in Java by Neha
 • 6,280 points • 9 views
0 votes
1 answer

What is Just in time compiler in Java?

The Just-In-Time compiler is one of the integral parts ...READ MORE

5 days ago in Java by Frankie
 • 9,810 points • 12 views
0 votes
1 answer

What do you mean by Socket Programming?

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

5 days ago in Java by Frankie
 • 9,810 points • 12 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 in Java by swats
 • 46 views
0 votes
10 answers

What is the correct way to add external Jars to IntelliJ IDEA Project?

The best way is to add the ...READ MORE

Dec 10, 2018 in Java by Nabarupa
 • 12,171 views
0 votes
1 answer

i am getting sessionnotcreatedexception in appium

Hi... it says here that Appium cannot ...READ MORE

Jun 27 in Java by ajs3033
 • 7,240 points • 37 views
0 votes
0 answers

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

I am currently testing an API which ...READ MORE

Jun 25 in Java by avishek
 • 120 points • 67 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 4 in Java by Akash
 • 160 points • 49 views
0 votes
1 answer

Abstract class provides partial abstraction. How?

An Abstract class in java may have ...READ MORE

Jun 25 in Java by Sirajul
 • 5,960 points • 46 views
0 votes
0 answers

Sending request using json object return 404 error code

I am getting mad with this code ...READ MORE

Jun 19 in Java by FooBayo
 • 120 points
edited Jun 19 by FooBayo • 26 views
+1 vote
10 answers

How does java.net.SocketException: Connection reset happen ?

You can use wireshark to view the ...READ MORE

Dec 7, 2018 in Java by tushh
 • 11,459 views
0 votes
1 answer

How can I make my output float when my two integers are integer?

Hi Prapti , I got your doubt please check ...READ MORE

Jun 3 in Java by Sampriti
 • 860 points • 23 views
+1 vote
10 answers

Iterate over a JSONObject?

You can use the following method to ...READ MORE

Dec 7, 2018 in Java by Shuvodip
 • 10,779 views
0 votes
1 answer

What is the difference between Map and HashMap in java?

Hi Sanhati, I understand your doubt regarding map ...READ MORE

May 31 in Java by Sampriti
 • 860 points • 44 views
0 votes
1 answer

How can I compare two integers properly?

Hi Divya, I hope this code snippet will ...READ MORE

May 31 in Java by Sampriti
 • 860 points • 22 views
0 votes
1 answer

How to Iterate HashMap?

Hi Shashank. Please try this code I hope ...READ MORE

May 30 in Java by Sampriti
 • 860 points • 19 views
0 votes
1 answer

How to find the nth prime number in Java?

Here is the code to find nth ...READ MORE

Mar 4 in Java by Priyaj
 • 56,160 points • 3,746 views
0 votes
1 answer

Is there a way to mask the password from java user input that comes from Scanner class and System.out.Println()?

You can use the console class to do so. ...READ MORE

May 27 in Java by Omkar
 • 67,120 points • 72 views
0 votes
0 answers

Where i have to put resource package so it's accessible by external jar in eclipse?

Servlet.init() for servlet [JERSEY] threw exception java.lang.ExceptionInInitializerError cause by ...READ MORE

May 29 in Java by anonymous
edited May 30 by Omkar • 16 views
0 votes
1 answer

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

Yes its possible. I had installed tomcat ...READ MORE

May 28 in Java by arvind.phulare1911
 • 180 points • 24 views
0 votes
1 answer

Can Enum implement Class

Enum is a type similar to that ...READ MORE

May 27 in Java by Sirajul
 • 5,960 points • 24 views
0 votes
1 answer

Should a class file always be inside package for importing it in jsp page?

Hey there! It is not necessary for the ...READ MORE

May 24 in Java by Karan
 • 20 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 in Java by Vicky
closed May 16 by Vardhan • 20 views
0 votes
1 answer

What are the different types of database testing?

The 3 types of Database Testing are Structural ...READ MORE

May 9 in Java by Frankie
 • 9,810 points • 19 views
0 votes
1 answer

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

The proper syntax to run a jar ...READ MORE

Apr 22 in Java by Omkar
 • 67,120 points • 134 views
0 votes
1 answer

How to download Eclipse on a flash drive and use it on a public computer?

To use Eclipse from a flash drive, ...READ MORE

Apr 22 in Java by Omkar
 • 67,120 points • 63 views
+1 vote
2 answers

What is coercion in Polymorphism?

Implicit type conversion is called coercion polymorphism. ...READ MORE

Jun 25 in Java by anonymous
 • 105 views
0 votes
1 answer

HttpServletRequest get JSON POST data

Normally you can GET and POST parameters ...READ MORE

Nov 29, 2018 in Java by Sushmita
 • 6,840 points • 5,995 views
0 votes
1 answer

Create fucntion to find GCD of two numbers

Hey @Diya, here is a code on how ...READ MORE

Mar 28 in Java by Priyaj
 • 56,160 points • 30 views
0 votes
4 answers

What is difference between access modifier and access specifier in java

Access Specifier:- This can be understood as ...READ MORE

Feb 14 in Java by Priyaj
 • 56,160 points • 1,313 views
0 votes
2 answers

What is the meaning of purpose of this command: java -jar <some jar file>.jar ?

JAR (Java Archive) file is a package file ...READ MORE

Mar 21 in Java by Omkar
 • 67,120 points • 32 views
0 votes
1 answer

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

According to me what you can do ...READ MORE

Mar 4 in Java by Priyaj
 • 56,160 points • 754 views
0 votes
1 answer

How to refresh data in ViewPager Fragment ?

Using the ViewPager.OnPageChangeListener is the correct way to go, ...READ MORE

Mar 6 in Java by developer_1
 • 3,280 points • 434 views
0 votes
2 answers

String comparission in Java

You should use s1.equals(s2) instead of '==' ...READ MORE

Mar 14 in Java by anonymous
 • 53 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 12 in Java by trisha
 • 34 views
0 votes
1 answer

Difference between Instance Variable and Class Variable

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

Mar 12 in Java by Reema
 • 40 views
0 votes
1 answer

How to parse invalid XML in Java ?

That "XML" is worse than invalid – it's not well-formed; ...READ MORE

Mar 6 in Java by developer_1
 • 3,280 points • 241 views
0 votes
0 answers

Iterate over json and output multiple rows

I have a json in which multiple ...READ MORE

Mar 12 in Java by Yogesh
 • 20 views
0 votes
1 answer

How to remove object from an Array?

Here is a code I came up ...READ MORE

Mar 11 in Java by Esha Gupta
 • 34 views
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