Trending questions in Java

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Difference between FetchType LAZY and EAGER in Java Persistence API?

Sometimes you have two entities and there's ...READ MORE

Dec 5, 2018 in Java by Daisy
 • 8,140 points • 4,434 views
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1 answer

String related Hash Functions

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

Feb 5, 2019 in Java by developer_1
 • 3,350 points • 1,730 views
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1 answer

If The A Class Is Declared Without Any Access Modifiers, Where May The Class Be Accessed In Java Programming?

A class that is declared without any ...READ MORE

Nov 28, 2018 in Java by Frankie
 • 9,830 points • 4,462 views
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2 answers

what is the best way to convert an ArrayList to a String

You could probably use the Joiner class ...READ MORE

Aug 19, 2019 in Java by Sirajul
 • 59,190 points • 3,305 views
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2 answers

How can I split the String with any whitespace character as delimiter?

String string = "Today's weather"; String[] arrayOfString = ...READ MORE

Aug 23, 2019 in Java by Sirajul
 • 59,190 points • 2,636 views
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1 answer

Fetching screen resolution using Java

You can fetch the screen resolution using the Toolkit.getScreenSize() method ...READ MORE

Sep 20, 2018 in Java by anto.trigg4
 • 3,440 points • 7,302 views
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2 answers

How to convert ArrayList<String> to String[] in Java

Try this:  String[] strArray = arrayList.toArray(new Str ...READ MORE

Aug 21, 2019 in Java by Sirajul
 • 59,190 points • 2,624 views
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1 answer

How can we override back button to act like home button?

Most of the time you need to ...READ MORE

Dec 14, 2018 in Java by Daisy
 • 8,140 points • 3,571 views
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1 answer

Can I help with the gradle code for AspectJ?

You can go to maven repositories https://mvnrepository.com/artifact/org.aspectj/aspectjtools/1.9.2 ...READ MORE

Jan 9, 2019 in Java by Frankie
 • 9,830 points • 2,469 views
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1 answer

How can I run test methods in specific order in JUnit4?

@FixMethodOrder(MethodSorters.NAME_ASCENDING) public class SampleTest { ...READ MORE

Jan 7, 2019 in Java by Daisy
 • 8,140 points • 2,501 views
+1 vote
2 answers

What is an Object?

Hey @preetiagarwal, your description is an answer ...READ MORE

Dec 24, 2018 in Java by Priyaj
 • 58,020 points • 2,923 views
0 votes
1 answer

Where is JAVA_HOME on macOS Mojave (10.14) to Lion (10.7)?

export JAVA_HOME="$(/usr/libexec/java_home -v 1.6)" or export JAVA_HOME="$(/usr/libexec/java_home -v 1.7)" or export ...READ MORE

Dec 4, 2018 in Java by Daisy
 • 8,140 points • 3,829 views
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1 answer

Spring configuration file

A Spring configuration file is an XML ...READ MORE

Aug 28, 2018 in Java by v.liyyah
 • 1,300 points • 8,086 views
0 votes
2 answers

How can I get current time in YYYY:MM:DD HH:MI:Sec:Millisecond format in Java?

public String getCurrentTimeStamp() { ...READ MORE

Sep 21, 2018 in Java by Parth
 • 4,640 points • 10,182 views
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1 answer

How to create a temporary directory/folder in java?

If you are using JDK 7 use ...READ MORE

Aug 28, 2018 in Java by Frankie
 • 9,830 points • 8,049 views
0 votes
1 answer

Using Jackson to deserialise an array of object

First create a mapper : import com.fasterxml.jackson.databind.ObjectMapper;// in ...READ MORE

Sep 26, 2018 in Java by Sushmita
 • 6,920 points • 6,713 views
0 votes
1 answer

What causes java.lang.reflect.InvocationTargetException

The exception is thrown if InvocationTargetException - if ...READ MORE

Jun 20, 2018 in Java by Rishabh
 • 3,600 points • 10,966 views
0 votes
1 answer

How to determine day of week by passing specific date?

You can use java.util.Calendar: Calendar c = Calendar.getInstance(); c.setTime(yourDate); int dayOfWeek ...READ MORE

Oct 30, 2018 in Java by Daisy
 • 8,140 points • 5,232 views
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1 answer

How to specify the certificate to use for authenticating the server to client?

You can try the command given below. System.setProperty("javax.net ...READ MORE

Jan 2, 2019 in Java by Daisy
 • 8,140 points • 2,408 views
0 votes
1 answer

Exception Handling: “ConcurrentModificationException” while removing elements from `ArrayList` while iterating it

Iterator<String> iter = myArrayList.iterator(); while (iter.hasNext()) { ...READ MORE

Jan 10, 2019 in Java by Sushmita
 • 6,920 points • 2,016 views
0 votes
1 answer

What is the maximum Java heap size of a 32-bit JVM on a 64-bit OS?

32-bit JVMs which expect to have a ...READ MORE

Nov 15, 2018 in Java by Frankie
 • 9,830 points • 4,383 views
0 votes
1 answer

Ways to compare String Values

== compares object references, it checks to see ...READ MORE

Jan 14, 2019 in Java by developer_1
 • 3,350 points • 1,786 views
0 votes
1 answer

Unable to Run the .java file

You have to enter the commands as ...READ MORE

Jan 11, 2019 in Java by Omkar
 • 69,180 points • 1,932 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
 • 3,190 points • 10,299 views
0 votes
1 answer

Is there any difference between ConcurrentHashMap and Collections.synchronizedMap?

ConcurrentHashMap: It allows concurrent modification of the ...READ MORE

Dec 26, 2018 in Java by Sushmita
 • 6,920 points • 2,508 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 • 9,193 views
0 votes
1 answer

Comparing Functions in Java

I would suggest that Version 1 is ...READ MORE

Jan 9, 2019 in Java by developer_1
 • 3,350 points • 1,770 views
0 votes
0 answers

Can anyone explain Autowiring in Spring ?

Say I have a service class called UserServiceImpl that ...READ MORE

Jan 11, 2019 in Java by Sushmita
 • 6,920 points • 1,693 views
0 votes
1 answer

Describe Heavy Weight Components Mean In Java Programming?

Heavy weight components like Abstract Window Toolkit ...READ MORE

Nov 28, 2018 in Java by Frankie
 • 9,830 points • 3,427 views
+1 vote
1 answer

What are REST clients for Java?

These are the few options : Apache CXF has ...READ MORE

Nov 22, 2018 in Java by Frankie
 • 9,830 points
edited Nov 8, 2024 by Sunita • 3,646 views
+2 votes
1 answer

How do I ask the Selenium-WebDriver to wait for few seconds in Java?

There are two ways to wait: explicit ...READ MORE

Dec 19, 2018 in Java by Daisy
 • 8,140 points
edited Dec 19, 2018 by Daisy • 2,236 views
+4 votes
1 answer

How to print the individual occurance of elements in Java?

You can use a HashMap to serve ...READ MORE

Dec 4, 2018 in Java by Priyaj
 • 58,020 points • 2,774 views
0 votes
1 answer

Understanding Spring @Autowired usage

TL;DR The @Autowired annotation spares you the need ...READ MORE

Nov 30, 2018 in Java by Sushmita
 • 6,920 points • 3,085 views
0 votes
1 answer

Why doesn't RecyclerView have onItemClickListener()?

I like this way and I'm using ...READ MORE

Dec 21, 2018 in Java by Daisy
 • 8,140 points • 2,153 views
0 votes
1 answer

Best XML parser for Java

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

Jul 21, 2018 in Java by samarth295
 • 2,220 points • 8,782 views
0 votes
1 answer

Types of transaction management in Spring Framework

Well there are basically to types of ...READ MORE

Nov 28, 2018 in Java by geek.erkami
 • 2,680 points • 3,152 views
0 votes
1 answer

What is the differnece between public static void main string args[] and psvm string []args ?

Before getting to this you should understand ...READ MORE

Nov 20, 2018 in Java by Nabarupa
 • 3,445 views
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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 • 4,346 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
 • 3,600 points • 9,447 views
0 votes
1 answer

What is blank final variable?

A final variable in Java can be ...READ MORE

Nov 29, 2018 in Java by Frankie
 • 9,830 points • 3,034 views
0 votes
1 answer

Ignoring new fields on JSON objects using Jackson

Jackson provides an annotation that can be ...READ MORE

Oct 25, 2018 in Java by Daisy
 • 8,140 points • 4,500 views
0 votes
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 • 8,849 views
0 votes
1 answer

Android Studio installation on Windows 7 fails, no JDK found

Adding a system variable JDK_HOME with value ...READ MORE

Dec 13, 2018 in Java by Daisy
 • 8,140 points • 2,307 views
0 votes
1 answer

Setting $PATH as used by applications in OS X

That's correct; it's in the plist file ~/.MacOSX/environment.plist It ...READ MORE

Dec 17, 2018 in Java by nirvana
 • 3,090 points • 2,119 views
0 votes
1 answer

JSON parsing in Java using Gson

Well, you can easily do that by ...READ MORE

Nov 22, 2018 in Java by code.reaper12
 • 3,500 points • 3,232 views
0 votes
1 answer

How to count the number of occurrences of an element in a List?

We can use the static frequency() method. int ...READ MORE

Aug 21, 2018 in Java by sharth
 • 3,370 points • 7,200 views
0 votes
1 answer

Java and SQLite

The wikipedia lists some more wrappers: A good tutorial ...READ MORE

Dec 21, 2018 in Java by Daisy
 • 8,140 points • 1,879 views
0 votes
1 answer

Java 8 List<V> into Map<K, V>

Based on Collectors documentation it's as simple as: Map<String, Choice> result ...READ MORE

Nov 29, 2018 in Java by Daisy
 • 8,140 points • 2,789 views
+1 vote
1 answer

How to find even or odd using call by value?

Call by value is, when a primitive ...READ MORE

Nov 23, 2018 in Java by Namitha
 • 2,993 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 • 9,179 views
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