Trending questions in Java

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How to display an animated GIF?

Android actually can decode and display animated ...READ MORE

Oct 8, 2018 in Java by sharth
• 3,350 points
121 views
0 votes
1 answer

Best XML parser for Java

If speed and memory is no problem, dom4j is ...READ MORE

Jul 20, 2018 in Java by samarth295
• 2,220 points
3,524 views
0 votes
2 answers

C++ performance vs. Java/C#

The overhead of interpreting code is much higher than ...READ MORE

Dec 27, 2018 in Java by iangregor
• 300 points
327 views
0 votes
1 answer

Constructor injection vs Setter injection in Spring Framework

Here, I have listed down few differences. ...READ MORE

Aug 29, 2018 in Java by anto.trigg4
• 3,440 points
1,722 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
3,172 views
0 votes
1 answer

No appenders could be found for logger(log4j)?

Just to get you going you have ...READ MORE

Jun 29, 2018 in Java by Akrati
• 3,170 points
4,305 views
0 votes
1 answer

How do you produce a double in Java

double num = 5; When you do this, ...READ MORE

Oct 3, 2018 in Java by anto.trigg4
• 3,440 points
93 views
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1 answer

Non-static method within Static method in Java

As per my knowledge, you are getting this error ...READ MORE

Sep 27, 2018 in Java by anto.trigg4
• 3,440 points
351 views
0 votes
1 answer

@RequestMapping annotation in Java Spring

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

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

How can we get the current location in Android?

First you need to define a LocationListener to handle ...READ MORE

Sep 25, 2018 in Java by Parth
• 4,630 points
233 views
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2 answers

Connection reset : java.net.SocketException

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

Sep 6, 2018 in Java by Sushmita
• 6,890 points
3,138 views
+1 vote
1 answer

How to calculate days between two dates?

You are making some conversions with your ...READ MORE

Aug 28, 2018 in Java by Frankie
• 9,810 points
1,389 views
0 votes
1 answer

What is the best Java email address validation method?

Apache Commons is generally known as a ...READ MORE

Sep 26, 2018 in Java by Parth
• 4,630 points
128 views
0 votes
1 answer

notify() vs. notifyAll() in Java

notify() is used to wake any thread in the wait ...READ MORE

Sep 20, 2018 in Java by code.reaper12
• 3,500 points
373 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
• 4,630 points
5,151 views
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1 answer

Increasing the JVM memory using command line

You can adjust your JVM memory needs by ...READ MORE

Sep 24, 2018 in Java by geek.erkami
• 2,680 points
161 views
0 votes
1 answer

How to download a file from spring controllers?

@RequestMapping(value = "/files/{file_name}", method = RequestMethod.GET) public void ...READ MORE

Sep 4, 2018 in Java by code.reaper12
• 3,500 points
1,004 views
0 votes
1 answer

Unescaping HTML character entities in Java

I guess you can use this function: StringEscapeUtils.unescapeH ...READ MORE

Sep 24, 2018 in Java by anto.trigg4
• 3,440 points
108 views
0 votes
1 answer

Bean life cycle in Spring Bean Factory Container

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

Aug 29, 2018 in Java by code.reaper12
• 3,500 points
1,228 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 23, 2018 in Java by scarlett
• 1,270 points
2,775 views
0 votes
1 answer

Spring AOP vs AspectJ AOP

Well, below I have listed down few ...READ MORE

Sep 10, 2018 in Java by v.liyyah
• 1,300 points
653 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
• 3,640 points
3,852 views
0 votes
2 answers

How can we assert, that a certain Exception is thrown in JUnit 4 tests?

@Test(expected = IndexOutOfBoundsException.class) public void testIndexOutOfBoundsException() { ...READ MORE

Dec 10, 2018 in Java by Sushmita
• 6,890 points
320 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
2,882 views
0 votes
1 answer

Java anonymous code blocks

The anonymous code blocks in Java are ...READ MORE

Sep 5, 2018 in Java by anto.trigg4
• 3,440 points
681 views
+1 vote
2 answers

Can I convert my Java program to an .exe file?

Launch4j is a cross-platform tool for wrapping ...READ MORE

Oct 18, 2018 in Java by Sushmita
• 6,890 points
1,665 views
0 votes
1 answer

@Qualifier annotation in Spring Framework

When you create more than one bean ...READ MORE

Sep 10, 2018 in Java by code.reaper12
• 3,500 points
440 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
636 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
• 3,350 points
3,127 views
0 votes
2 answers

What is the difference between implements and extends?

Extends : This is used to get attributes ...READ MORE

Aug 3, 2018 in Java by samarth295
• 2,220 points
4,264 views
0 votes
2 answers

How can I do url string decoding in java

We can use URLDecoder: URLDecoder.decode( url, "UTF-8" ); READ MORE

Dec 7, 2018 in Java by Sushmita
• 6,890 points
180 views
0 votes
1 answer

Simple HTTP server in Java using only Java SE API

You can write a pretty simple embedded Jetty Java ...READ MORE

Aug 28, 2018 in Java by Parth
• 4,630 points
924 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
• 8,110 points
421 views
0 votes
1 answer

How to call a method after a delay in Android using Java?

final Handler handler = new Handler(); handler.postDelayed(new Runnable() ...READ MORE

Jun 11, 2018 in Java by Akrati
• 3,170 points
4,278 views
0 votes
1 answer

How can we add local .jar file dependency to build.gradle file?

You can refer the below code if ...READ MORE

Jun 27, 2018 in Java by Akrati
• 960 points
3,577 views
0 votes
1 answer

System.currentTimeMillis vs System.nanoTime

In case you want extremely precise measurements ...READ MORE

Aug 10, 2018 in Java by code.reaper12
• 3,500 points
1,675 views
0 votes
1 answer

Various Advice in Spring AOP

Below are the various advices available in AOP: Before: These types ...READ MORE

Sep 12, 2018 in Java by geek.erkami
• 2,680 points
213 views
0 votes
1 answer

Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved

Check the maven repository server is up. Check ...READ MORE

Jun 25, 2018 in Java by Sushmita
• 6,890 points
3,594 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
• 6,890 points
1,170 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
• 29,300 points
257 views
0 votes
1 answer

Good Hash Function for Strings

Usually hashes wouldn't do sums, otherwise, stop and pots will have ...READ MORE

Jul 19, 2018 in Java by Akrati
• 960 points
2,489 views
0 votes
1 answer

Fixing android.os.NetworkOnMainThreadException in Java

Android has some good tips on good ...READ MORE

Jun 12, 2018 in Java by Rishabh
• 3,640 points
4,018 views
0 votes
2 answers

When I am running eclispe on my computer it is throwing error. How to resolve it?

If you have downloaded the 64 bit ...READ MORE

Dec 10, 2018 in Java by Sushmita
• 6,890 points
328 views
0 votes
2 answers

How to left pad a string with zero in java?

String paddedString = org.apache.commons.lang.StringUtils.leftPad("129018", 10, "0") the second ...READ MORE

Aug 31, 2018 in Java by Sushmita
• 6,890 points
1,746 views
0 votes
1 answer

Why is the Scanner skipping nextLine() after using next() or nextFoo()

public static void main(String[] args) { ...READ MORE

Aug 27, 2018 in Java by samarth295
• 2,220 points
699 views
0 votes
1 answer

SuppressWarnings (“unchecked”) in Java

@SuppressWarnings("unchecked") is used when Java generics just don't ...READ MORE

Sep 4, 2018 in Java by anto.trigg4
• 3,440 points
340 views
0 votes
2 answers

Java Environment Variables

--- To set java path --- There are ...READ MORE

Dec 3, 2018 in Java by Sushmita
• 6,890 points
460 views
0 votes
1 answer

What are the Foreign key constraints in Android using SQLite

You can use, Foreign key constraints with ...READ MORE

Aug 24, 2018 in Java by geek.erkami
• 2,680 points
724 views
0 votes
2 answers

Determining Class of an Object in Java

You can use: Object instance = new SomeClass(); instance.getClass().getName(); ...READ MORE

Nov 26, 2018 in Java by Sushmita
• 6,890 points
494 views
0 votes
2 answers

Java enum lookup using a String

Check this...Java Enum in details READ MORE

Dec 4, 2018 in Java by allenvarna
• 520 points
231 views