Most answered questions in Java

+17 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 • 255,659 views
+9 votes
16 answers

javac' is not recognized as an internal or external command, operable program or batch file.

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 • 471,319 views
+3 votes
14 answers

com.mysql.cj.jdbc.exceptions.communicationsexception :Communications link failure

Exception in thread "main" com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link ...READ MORE

Dec 12, 2024 in Java by jack
edited Mar 6 • 253,108 views
+3 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
 • 10,480 points • 250,906 views
+1 vote
13 answers

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

Adding custom JAR files to the EAR project Copy the custom JAR to the ...READ MORE

Dec 10, 2020 in Java by Nikita
 • 188,834 views
+2 votes
13 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
 • 254,976 views
+3 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
 • 217,773 views
+11 votes
13 answers

What are the default xmx and xms values ?

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

Nov 13, 2018 in Java by anonymous
 • 405,391 views
+1 vote
13 answers

How to send HTTP POST requests on Java?

With Apache HttpClient In the old days, this Apache ...READ MORE

Dec 10, 2020 in Java by Rajiv
 • 8,870 points • 160,903 views
+1 vote
12 answers

Iterate over a JSONObject?

Assuming your JSON object is saved in ...READ MORE

Dec 11, 2020 in Java by Rajiv
 • 8,870 points • 126,189 views
+1 vote
12 answers

Hibernate hbm2ddl.auto possible values and their uses

hibernate.hbm2ddl.auto (e.g. none (default value), create-only, drop, create, create-drop, validate, and update) Setting to perform SchemaManagementTool actions automatically as ...READ MORE

Dec 7, 2018 in Java by Shuvodip
 • 79,109 views
0 votes
12 answers

Java - sending HTTP parameters via POST method easily

Below are the steps we need to ...READ MORE

Dec 11, 2020 in Java by Rajiv
 • 8,870 points • 112,144 views
+5 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
 • 8,140 points • 363,475 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 • 11,026 views
+1 vote
9 answers

How to make mock to void methods with mockito

You can use partial mocking to serve ...READ MORE

Dec 7, 2018 in Java by nitesh
 • 35,764 views
+1 vote
7 answers

What is difference between access modifier and access specifier in java

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

Feb 14, 2019 in Java by Priyaj
 • 58,020 points • 72,945 views
+1 vote
6 answers

How to separate digits of a number in Java ?

String numberString = Integer.toString(number);  for (int i = ...READ MORE

Dec 5, 2023 in Java by Akash
 • 100 points
edited Mar 5 • 213,168 views
0 votes
6 answers

How can we define global variables in java?

To define Global Variable you can make ...READ MORE

Dec 15, 2020 in Java by Gitika
 • 65,770 points • 119,109 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 • 126,480 views
0 votes
5 answers

How to compare Strings in Java?

String fooString1 = new String("foo"); String fooString2 = ...READ MORE

Jul 12, 2018 in Java by Daisy
 • 8,140 points • 2,844 views
0 votes
4 answers

How do I check if a file exists in Java?

To test to see if a file ...READ MORE

Dec 29, 2020 in Java by Rajiv
 • 8,870 points • 69,571 views
0 votes
4 answers

How to convert a char to a String?

There are two ways you can do ...READ MORE

Dec 29, 2020 in Java by Roshni
 • 10,480 points • 1,491 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 • 51,882 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
 • 10,480 points • 99,502 views
+1 vote
4 answers

What is the difference between string object and string literal?

A String literal is a Java language concept. This ...READ MORE

Aug 16, 2019 in Java by Sirajul
 • 59,230 points • 68,448 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
 • 58,020 points • 94,691 views
+1 vote
4 answers

What is a simple way to repeat a string in java?

There is already answer wriiten using StringBuilder ...READ MORE

Dec 16, 2020 in Java by Rajiv
 • 8,870 points • 30,021 views
0 votes
4 answers

“Cannot find symbol” compilation error

The "Cannot find symbol" errors generally occur when you ...READ MORE

Dec 16, 2020 in Java by Gitika
 • 65,770 points • 42,788 views
0 votes
4 answers

How can we display an output of float data with 2 decimal places in java? Please help

You can use DecimalFormat. One way to use ...READ MORE

Dec 16, 2020 in Java by Gitika
 • 65,770 points • 167,488 views
0 votes
4 answers

How can we compare dates in java?

public static String daysBetween(String day1, String day2) ...READ MORE

Sep 5, 2018 in Java by Sushmita
 • 6,920 points • 1,752 views
0 votes
4 answers

Remove extra spaces from string in java

import java.util.regex.Matcher; import java.util.regex.Pattern; String pattern="[\\s]"; String replace=""; part="name=john age=13 year=2001"; Pattern ...READ MORE

Sep 10, 2018 in Java by Parth
 • 4,640 points • 3,485 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 • 82,402 views
0 votes
3 answers

How to check if a String is numeric in Java?

Check if a string is numeric public class ...READ MORE

Dec 29, 2020 in Java by Carlos
 • 3,128 views
0 votes
3 answers

How to rotate an array from a particular index?

private static void rotate(int[] arr, int order) ...READ MORE

Aug 29, 2019 in Java by Sirajul
 • 59,230 points • 2,294 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 • 19,089 views
0 votes
3 answers

HttpServletRequest get JSON POST data

Configure the action as given below: Method: Since ...READ MORE

Dec 16, 2020 in Java by Rajiv
 • 8,870 points • 69,384 views
+1 vote
3 answers

3 dot in parameter in Java

The "Three Dots" in java is called ...READ MORE

Nov 22, 2018 in Java by geek.erkami
 • 2,680 points • 57,696 views
0 votes
3 answers

How does the “final” keyword in Java work?

Final is a keyword that is used ...READ MORE

Sep 1, 2019 in Java by DEEPAK KUMAR GUPTA
 • 2,840 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
 • 29,370 points • 1,734 views
0 votes
3 answers

Setting time zone of a java.util.Date

Using Java 8 Java 8 introduced a new Date-Time ...READ MORE

Dec 15, 2020 in Java by Gitika
 • 65,770 points • 57,618 views
+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 • 23,213 views
0 votes
3 answers

What is ^ operator in java?

It's bitwise XOR, Java does not have ...READ MORE

Oct 31, 2018 in Java by Sushmita
 • 6,920 points • 1,325 views
0 votes
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
 • 8,140 points • 1,560 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 • 15,321 views
0 votes
3 answers

How can we use java.String.format in Scala?

String aString = "world"; int aInt = 20; String.format("Hello, ...READ MORE

Aug 29, 2018 in Java by Daisy
 • 8,140 points • 2,200 views
0 votes
3 answers

Does Java support Default Parameters?

You can try this with method overloading. void ...READ MORE

Sep 21, 2018 in Java by Sushmita
 • 6,920 points • 7,214 views
0 votes
3 answers

Change date format in a Java string

The reason for the inaccuracy is because ...READ MORE

Feb 9, 2022 in Java by Soham
 • 9,710 points • 3,760 views
0 votes
3 answers

How to clear the console in Java?

System.out.println("\f"); You can paste the above ↑↑ code ...READ MORE

Jan 29, 2021 in Java by https://github.com/voyager2005
edited Mar 5 • 36,605 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 • 1,344 views
+1 vote
3 answers

Copy Java Array and make a duplicate of it

int[] a = {1,2,3,4,5}; int[] b = Arrays.copyOf(a, ...READ MORE

Aug 30, 2018 in Java by Sushmita
 • 6,920 points • 1,988 views
Page:

Most popular tags

"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.