Latest questions in Java

0 votes
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 • 2,710 views
0 votes
1 answer

HashMap with multiple values under the same key

Use a map that has a list ...READ MORE

Dec 13, 2018 in Java by Sushmita
 • 6,920 points • 5,992 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 • 1,446 views
0 votes
1 answer

Is there a way to instantiate abstract class ?

No, you are not creating the instance ...READ MORE

Dec 12, 2018 in Java by Sushmita
 • 6,920 points • 9,130 views
0 votes
1 answer

Integrate UTF-8 encoding in Java WebApp

Mostly characters äåö are not a problematic ...READ MORE

Dec 12, 2018 in Java by Sushmita
 • 6,920 points • 13,470 views
0 votes
2 answers

Unable to find valid certification path to requested target

Unfortunately - it could be many things ...READ MORE

Dec 15, 2020 in Java by Roshni
 • 10,440 points • 42,940 views
0 votes
1 answer

Mocking static methods with Mockito

@RunWith(PowerMockRunner.class) @PrepareForTest(DriverManager.class) public class Mocker { ...READ MORE

Dec 12, 2018 in Java by Daisy
 • 8,140 points • 7,793 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 • 1,082 views
0 votes
1 answer

How do I implement a HttpURLConnection using a Proxy ?

Since java 1.5 you can also pass ...READ MORE

Dec 10, 2018 in Java by Sushmita
 • 6,920 points • 11,548 views
0 votes
1 answer

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 • 3,105 views
0 votes
1 answer

Received fatal alert: handshake_failure through SSLHandshakeException

On update 51, java 1.8 prohibited[1] RC4 ...READ MORE

Dec 5, 2018 in Java by Daisy
 • 8,140 points • 6,761 views
0 votes
2 answers

How to iterate in a HashMap in Java?

Iterating using Iterator. Using Generics: Map<Integer, Integer> map = ...READ MORE

Aug 28, 2019 in Java by Sirajul
 • 59,190 points • 1,406 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 • 1,716 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 • 2,933 views
0 votes
1 answer

Sending Email in Android using JavaMail API without using the default/built-in app

Send e-mail in Android using the JavaMail ...READ MORE

Dec 4, 2018 in Java by Daisy
 • 8,140 points • 3,799 views
0 votes
1 answer

How can you catch an exception thrown by another thread in Java?

in Java by anonymous
 • 26,521 views
0 votes
1 answer

Which of them among ArrayList, LinkedList, and Vector is most efficient for adding and removing elements from the list?

Of the three, LinkedList is generally going ...READ MORE

Dec 3, 2018 in Java by Frankie
 • 9,830 points • 8,546 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 • 2,158 views
0 votes
1 answer

Getting a File's MD5 Checksum in Java

There's an input stream decorator, java.security.DigestInputStream, so that ...READ MORE

Nov 30, 2018 in Java by Daisy
 • 8,140 points • 1,576 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 • 70,040 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 • 1,809 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 • 2,196 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 • 1,331 views
0 votes
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 • 3,435 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 • 2,292 views
0 votes
1 answer

Java Client Certificate over HTTPS/SSL

The missing links was (mostly) the first ...READ MORE

Nov 28, 2018 in Java by Sushmita
 • 6,920 points • 7,257 views
0 votes
1 answer

Sending POST data in Android

public class CallAPI extends AsyncTask<String, String, String> ...READ MORE

Nov 28, 2018 in Java by Sushmita
 • 6,920 points • 1,833 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 • 2,231 views
0 votes
1 answer

@Component vs @Controller vs @Repository vs @Service annotations in Spring Framework

@Component: This marks a java class as a bean. ...READ MORE

Nov 28, 2018 in Java by code.reaper12
 • 3,500 points • 12,883 views
0 votes
1 answer

web.xml file is missing in my eclipse IDE

Very simple. You will find Deployment Descriptor ...READ MORE

Nov 27, 2018 in Java by Omkar
 • 69,180 points • 4,367 views
0 votes
1 answer

Unable to find valid certification path to requested target - error even after cert imported

Unfortunately - it could be many things ...READ MORE

Nov 27, 2018 in Java by Daisy
 • 8,140 points • 5,430 views
0 votes
1 answer

Converting ISO 8601-compliant String to java.util.Date

Unfortunately, the time zone formats available to SimpleDateFormat (Java ...READ MORE

Nov 27, 2018 in Java by Daisy
 • 8,140 points
edited Oct 7, 2021 by Sarfaraz • 10,341 views
+1 vote
2 answers

Factorial of a number using while loop

import java.util.*; public class Fact { ...READ MORE

Mar 19, 2020 in Java by leela
 • 140 points • 4,547 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
 • 1,985 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
 • 798 views
0 votes
1 answer

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
 • 1,888 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
 • 1,773 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 • 96,040 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 • 2,735 views
0 votes
2 answers

In Java, what is the best way to determine the size of an object?

I happened to find a java class "jdk.nashorn.internal.ir.debug.ObjectSizeCalculator", ...READ MORE

Aug 19, 2019 in Java by Sirajul
 • 59,190 points • 13,786 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 • 58,660 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 • 2,395 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
 • 1,579 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
 • 1,053 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
 • 1,424 views
+1 vote
1 answer

Error: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2

Hello @Jino, It is just a JVM bug ...READ MORE

Nov 21, 2018 in Java by Nabarupa
 • 5,102 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
 • 2,643 views
0 votes
1 answer

Concern and cross-cutting concern in Spring AOP

The concern is the behavior we want ...READ MORE

Nov 16, 2018 in Java by code.reaper12
 • 3,500 points
edited Mar 4, 2022 by Sarfaraz • 19,083 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 • 1,539 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 • 975 views
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