Trending questions in Java

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How is the array's address stored in memory?

In terms of memory, you have continuous blocks ...READ MORE

Nov 23, 2018 in Java by Namitha
 • 1,665 views
0 votes
1 answer

Can anyone show how to implement SortByValue in Tree Map for Java ?

You can't have the TreeMap itself sort on the ...READ MORE

Dec 10, 2018 in Java by Sushmita
 • 6,920 points
edited Dec 10, 2018 by Sushmita • 883 views
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2 answers

How can we Split Java String by New Line?

If you don’t want empty lines: String.split("[\\r\\n]+") READ MORE

Aug 22, 2018 in Java by Daisy
 • 8,140 points • 7,267 views
+1 vote
1 answer

How to print factorial of a number using While loop?

While also works like for just you ...READ MORE

Nov 22, 2018 in Java by Namitha
 • 1,485 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 • 1,145 views
+1 vote
1 answer

Maximum memory usage for JVM

I guess, you can try using the ...READ MORE

Nov 14, 2018 in Java by 93.lynn
 • 1,600 points • 1,773 views
0 votes
1 answer

How to handle infinite loop in Java?

You can simply add a increment statement ...READ MORE

Nov 22, 2018 in Java by Anoop
 • 1,355 views
0 votes
1 answer

Java Timer vs Executor Service

According to Java Concurrency in Practice: Timer is ...READ MORE

Jul 26, 2018 in Java by code.reaper12
 • 3,500 points • 6,374 views
0 votes
1 answer

Generate 10 fibonacci numbers.

The placement of logic is wrong that ...READ MORE

Nov 21, 2018 in Java by Nabarupa
 • 1,238 views
0 votes
2 answers

Is there a SortedList in Java?

Since all lists are already "sorted" by ...READ MORE

Nov 2, 2018 in Java by Sushmita
 • 6,920 points • 4,618 views
0 votes
1 answer

Play MP3 files usng Java API

I don't believe the java AudioStream class ...READ MORE

May 10, 2018 in Java by Rishabh
 • 3,620 points • 9,557 views
0 votes
2 answers

Performing HTTP POST operation in JAVA

I'm using JSON-Java to build my JSON object: JSONObject json ...READ MORE

Nov 26, 2018 in Java by Sushmita
 • 6,920 points • 4,748 views
0 votes
1 answer

Creating an instance using the class name and calling constructor

Yes: Class<?> clazz = Class.forName(className); Constructor<?> ctor = clazz.getConstructor(String.class); Object ...READ MORE

Oct 9, 2018 in Java by Daisy
 • 8,140 points • 2,991 views
0 votes
1 answer

How to tell Jackson to ignore a field during serialization if its value is null?

To suppress serializing properties with null values ...READ MORE

Jul 4, 2018 in Java by Rishabh
 • 3,620 points • 7,161 views
0 votes
1 answer

Affinity in Java thread

Well, as far as I know, I ...READ MORE

Oct 31, 2018 in Java by code.reaper12
 • 3,500 points • 2,021 views
0 votes
1 answer

Serializing a lambda

With the release of Java 8, Oracle introduced the ...READ MORE

Nov 16, 2018 in Java by code.reaper12
 • 3,500 points • 1,324 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 • 1,282 views
0 votes
1 answer

Find Oracle JDBC driver in Maven repository

Download the jar and place it in ...READ MORE

Sep 26, 2018 in Java by Daisy
 • 8,140 points • 3,435 views
0 votes
1 answer

How to force garbage collection in Java?

Your best option is to call System.gc() which simply ...READ MORE

Nov 15, 2018 in Java by Frankie
 • 9,830 points • 1,233 views
0 votes
1 answer

How can we handle the javax.net.ssl.SSLHandshakeException?

import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; import java.io.OutputStream; // ...READ MORE

Oct 10, 2018 in Java by Daisy
 • 8,140 points • 2,694 views
0 votes
1 answer

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: How to handle this exception?

You have a com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure java.net.ConnectException: ...READ MORE

Oct 8, 2018 in Java by Parth
 • 4,640 points • 2,793 views
0 votes
1 answer

Running Java program without main method.

This would have worked fine till Java ...READ MORE

Nov 21, 2018 in Java by Anoop
 • 798 views
0 votes
1 answer

How to convert or cast hashmap to JSON object in Java, and again convert JSON object to JSON string?

You can use: new JSONObject(map); READ MORE

Jun 27, 2018 in Java by Akrati
 • 3,190 points • 7,139 views
0 votes
1 answer

@RequestMapping annotation in Java Spring

The @RequestMapping annotation in Spring Framework is ...READ MORE

Sep 12, 2018 in Java by code.reaper12
 • 3,500 points • 3,776 views
0 votes
1 answer

ArrayIndexOutOfBoundsException in Java

The index of array starts from 0. public ...READ MORE

Nov 23, 2018 in Java by Namitha
 • 635 views
0 votes
2 answers

Connection reset : java.net.SocketException

You should check whether the client program is ...READ MORE

Sep 6, 2018 in Java by Sushmita
 • 6,920 points • 6,003 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 • 1,432 views
0 votes
1 answer

What is Enum in Java?

 It means that the type argument for ...READ MORE

Nov 13, 2018 in Java by Frankie
 • 9,830 points • 921 views
0 votes
1 answer

Which is the standard concise way to copy a file in Java?

As toolkit mentions above, Apache Commons IO ...READ MORE

Nov 15, 2018 in Java by Frankie
 • 9,830 points • 752 views
0 votes
1 answer

How can we encrypt a String in Java?

Let's assume the bytes to encrypt are ...READ MORE

Oct 26, 2018 in Java by Sushmita
 • 6,920 points • 1,527 views
0 votes
1 answer

Array indexOf() in Java

You can use this indexOf() method through Arrays utility class. If the ...READ MORE

Sep 20, 2018 in Java by geek.erkami
 • 2,680 points • 3,106 views
0 votes
1 answer

Writing a UTF-8 file with Java

You can make use of a FileOutputStream rather than ...READ MORE

Oct 15, 2018 in Java by anto.trigg4
 • 3,440 points • 1,981 views
0 votes
2 answers

How to initialize multi-dimensional array in java?

a multidimensional array can define an array ...READ MORE

Mar 18, 2019 in Java by monica jesvina
 • 1,424 views
0 votes
1 answer

org.xml.sax.SAXParseException: How to handle this exception?

This is often caused by a white ...READ MORE

Jul 9, 2018 in Java by sharth
 • 3,370 points • 6,177 views
0 votes
2 answers

How to parse a date?

SimpleDateFormat parser=new SimpleDateFormat("EEE MMM d HH:mm:ss zzz ...READ MORE

Dec 6, 2018 in Java by Sushmita
 • 6,920 points • 980 views
0 votes
1 answer

Default Object.toString() in hashcode

Well, the hash code object is the ...READ MORE

Oct 31, 2018 in Java by code.reaper12
 • 3,500 points • 1,201 views
0 votes
2 answers

How an object array can be converted to string array in java?

System.arraycopy is the most efficient way, but ...READ MORE

Aug 8, 2018 in Java by Sushmita
 • 6,920 points • 6,042 views
0 votes
1 answer

How can we return a JSON object from a Java Servlet?

response.setContentType("application/json"); // Get the printwriter object from response ...READ MORE

Jul 6, 2018 in Java by sharth
 • 3,370 points • 6,127 views
0 votes
1 answer

Working of Progress Bar for a File Download

Once of the ways to achieve is ...READ MORE

Jun 26, 2018 in Java by Rishabh
 • 3,620 points • 6,491 views
+1 vote
2 answers

What are inner classes and static nested classes?

Nested classes are divided into two categories: ...READ MORE

Dec 3, 2018 in Java by Sushmita
 • 6,920 points • 4,119 views
0 votes
1 answer

Can't access static fields in inner classes in Java

Well, the major idea behind this concept ...READ MORE

Oct 9, 2018 in Java by anto.trigg4
 • 3,440 points • 1,962 views
0 votes
1 answer

How to run a JAR file in Java?

The command given below will help you ...READ MORE

Jun 1, 2018 in Java by Parth
 • 4,640 points • 7,537 views
0 votes
2 answers

How to find out a single character appears in String or not in Java?

You can use string.indexOf('s'). If the 's' is present in string, ...READ MORE

Aug 7, 2018 in Java by Sushmita
 • 6,920 points • 6,091 views
0 votes
1 answer

doGet and doPost in Servlets

When you are using HTTP GET requests ...READ MORE

Jul 17, 2018 in Java by Mrunal
 • 680 points • 5,515 views
0 votes
1 answer

Executing commands with parameters in Java

Try using the below command: Runtime.getRuntime().exec(new String[]{"php","/var/www/script.php", "-m", ...READ MORE

Sep 5, 2018 in Java by geek.erkami
 • 2,680 points • 3,285 views
+1 vote
1 answer

Converting a date string to a DateTime object using Joda Time library

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

Jul 24, 2018 in Java by scarlett
 • 1,290 points • 5,101 views
0 votes
1 answer

How to convert a string representation of a hex dump to a byte array using Java?

public static byte[] hexStringToByteArray(String s) { ...READ MORE

Sep 26, 2018 in Java by sharth
 • 3,370 points • 2,330 views
0 votes
1 answer

varargs in Java

Well, varargs are generally used to deal ...READ MORE

Oct 31, 2018 in Java by code.reaper12
 • 3,500 points • 781 views
0 votes
1 answer

HTML Parsing in Java

Well, to parse HTML I used JTidy.  Basically, ...READ MORE

Nov 2, 2018 in Java by geek.erkami
 • 2,680 points • 681 views
0 votes
1 answer

Bean life cycle in Spring Bean Factory Container

Bean life cycle in Spring Bean Factory ...READ MORE

Aug 30, 2018 in Java by code.reaper12
 • 3,500 points • 3,455 views
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