Trending questions in Java

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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
 • 3,190 points • 5,440 views
0 votes
1 answer

Use Servlets with Ajax

Here, we are going to create the ...READ MORE

Jul 16, 2018 in Java by Akrati
 • 3,190 points • 3,900 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 • 3,752 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 • 1,447 views
0 votes
1 answer

What is the simplest way to read JSON from a URL in java

Read json from url use url.openStream() and read contents ...READ MORE

Jun 13, 2018 in Java by samarth295
 • 2,220 points • 5,316 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 29, 2018 in Java by Parth
 • 4,640 points • 1,942 views
0 votes
1 answer

Increasing the JVM memory using command line

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

Sep 25, 2018 in Java by geek.erkami
 • 2,680 points • 730 views
0 votes
1 answer

What is the difference between hashset and treeset?

HashSet vs TreeSet: 1- Hashset gives better performance (faster) ...READ MORE

Jun 20, 2018 in Java by Akrati
 • 3,190 points • 4,879 views
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2 answers

Ho do I Iterate through a HashMap which contains duplicate values

for (Map.Entry<String, String> item : params.entrySet()) { ...READ MORE

Jul 24, 2018 in Java by samarth295
 • 2,220 points • 5,495 views
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1 answer

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

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

Aug 28, 2018 in Java by samarth295
 • 2,220 points • 1,881 views
0 votes
1 answer

Unescaping HTML character entities in Java

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

Sep 25, 2018 in Java by anto.trigg4
 • 3,440 points • 594 views
0 votes
1 answer

Can we convert a string to hexadecimal in java

I find this to be an easy ...READ MORE

Jul 4, 2018 in Java by Akrati
 • 3,190 points • 4,131 views
0 votes
1 answer

Difference between checked and unchecked exception

Checked Exceptions : The exceptions which are checked by ...READ MORE

Jul 16, 2018 in Java by Akrati
 • 3,190 points • 3,564 views
0 votes
2 answers

Java Environment Variables

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

Dec 3, 2018 in Java by Sushmita
 • 6,920 points • 1,547 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
 • 6,920 points • 891 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 • 1,831 views
0 votes
3 answers

Increment the date in Java by 1-day

import java.time.LocalDate; public class DateIncrementer { static ...READ MORE

Aug 1, 2018 in Java by Akrati
 • 3,190 points • 4,666 views
0 votes
1 answer

Removing an Integer from a List<Integer> in Java

In Java, the method best suiting your argument ...READ MORE

Aug 24, 2018 in Java by anonymous
 • 1,780 views
0 votes
1 answer

get a class instance of generics type T

The short answer is, that there is ...READ MORE

May 29, 2018 in Java by Parth
 • 4,640 points • 5,536 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
 • 6,920 points • 1,189 views
0 votes
2 answers

What is the use of toString method in Java and how can I use it ?

Whenever you require to explore the constructor ...READ MORE

Aug 23, 2018 in Java by Daisy
 • 8,140 points • 4,275 views
0 votes
1 answer

DEX decompilation in Java Sourcecode

down voteaccep It's easy Get these tools: 1) dex2jar to translate dex ...READ MORE

Jun 29, 2018 in Java by Rishabh
 • 3,620 points • 4,017 views
0 votes
1 answer

Add jars to maven 2 build class path without installing them?

wn voteA quick&dirty batch solution (based on Alex's answer): libs.bat @ECHO ...READ MORE

Aug 30, 2018 in Java by samarth295
 • 2,220 points • 1,340 views
0 votes
1 answer

Generate UML diagrams from Java code?

You could also give the netbeans UML ...READ MORE

Aug 30, 2018 in Java by samarth295
 • 2,220 points • 1,334 views
0 votes
2 answers

One line initialization of an ArrayList object in Java

In Java 8 or earlier: List<String> string = ...READ MORE

Jul 26, 2018 in Java by samarth295
 • 2,220 points • 4,995 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
 • 540 points • 1,089 views
0 votes
3 answers

How to check whether a file exists or not in Java?

Using nio we can check whether file ...READ MORE

Aug 14, 2018 in Java by Sushmita
 • 6,920 points • 4,377 views
0 votes
2 answers

What is the use of final class in java?

In Java, items with the final modifier cannot be ...READ MORE

Oct 5, 2018 in Java by Daisy
 • 8,140 points • 2,037 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 • 1,239 views
0 votes
3 answers

How to parse JSON in Java

import org.json.*; JSONObject obj = new JSONObject(" .... ...READ MORE

Aug 20, 2018 in Java by Daisy
 • 8,140 points • 4,151 views
0 votes
1 answer

Gracefully stopping a java thread

The preferable way will be to use a ...READ MORE

Aug 21, 2018 in Java by anto.trigg4
 • 3,440 points • 1,535 views
0 votes
3 answers

Check if a String is numeric in Java

Java 8 Lambda Expression is used: String someString ...READ MORE

Sep 3, 2018 in Java by Daisy
 • 8,140 points • 3,874 views
0 votes
2 answers

When to use LinkedList and ArrayList in Java?

ArrayList is what you want. LinkedList is almost always a ...READ MORE

Dec 11, 2018 in Java by Sushmita
 • 6,920 points • 1,262 views
0 votes
1 answer

How to read an XML file using XPath in Java?

Import the packages required to work with ...READ MORE

Jun 14, 2018 in Java by Akrati
 • 3,190 points • 4,390 views
0 votes
2 answers

How does random shuffling of an array

Here is a simple way using an ArrayList: List<Integer> ...READ MORE

Nov 2, 2018 in Java by Sushmita
 • 6,920 points • 997 views
0 votes
1 answer

How to calculate the interval between 2 dates

The following code might be helpful: public static ...READ MORE

Aug 29, 2018 in Java by bug_seeker
 • 15,510 points • 1,077 views
0 votes
1 answer

How can we set environment variables from java?

For setting the environment variable, you can ...READ MORE

Jun 21, 2018 in Java by Akrati
 • 960 points • 4,030 views
0 votes
2 answers

How to sort an ArrayList of custom object by property in Java?

You can Sort using java 8 yourList.sort(Comparator.comparing(Classname::getName)); or  yourList.stream().forEach(a -> ...READ MORE

Aug 14, 2018 in Java by samarth295
 • 2,220 points • 3,178 views
0 votes
2 answers

What's the best way to check if a String represents an integer in Java?

You can also use regular expression. str.matches("-?\\d+"); It will ...READ MORE

Aug 9, 2018 in Java by Daisy
 • 8,140 points • 4,103 views
0 votes
1 answer

Enums be subclassed to add new elements?

I suggest you take the other way ...READ MORE

Aug 29, 2018 in Java by Parth
 • 4,640 points • 919 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 • 1,460 views
0 votes
1 answer

@Autowired annotation in Spring Framework

The @Autowired annotation provides more accurate control over where ...READ MORE

Aug 3, 2018 in Java by geek.erkami
 • 2,680 points • 1,944 views
0 votes
1 answer

Retrieve a file from a server via SFTP

Below is an example using Apache Common ...READ MORE

Aug 28, 2018 in Java by samarth295
 • 2,220 points • 859 views
0 votes
1 answer

Maximum depth of the java call stack

Well, there is no definite depth. It ...READ MORE

Jul 24, 2018 in Java by code.reaper12
 • 3,500 points • 2,370 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 • 3,361 views
0 votes
1 answer

java.lang.OutOfMemoryError: GC overhead limit exceeded Error

This simply means that for some reason ...READ MORE

May 31, 2018 in Java by misc.edu04
 • 1,450 points • 4,624 views
0 votes
1 answer

How can we remove html tags from a string?

You can use HTML parser. This is ...READ MORE

Jun 4, 2018 in Java by sophia
 • 1,400 points • 4,419 views
+1 vote
1 answer

How do I do a HTTP GET?

If you don't want to use external ...READ MORE

Aug 28, 2018 in Java by Neha
 • 6,300 points • 700 views
0 votes
1 answer

Replace String with another in java

String s = "HelloSuresh"; s = s.replace("Hello",""); System.out.pri ...READ MORE

Aug 21, 2018 in Java by Parth
 • 4,640 points • 1,004 views
0 votes
1 answer

How to retrieve column names from java.sql.ResultSet?

You may refer the below code: ResultSet ...READ MORE

Jul 4, 2018 in Java by sophia
 • 1,400 points • 3,084 views
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