Latest questions in Java

0 votes
1 answer

Which is the best GUI designer for Eclipse?

Windows Builder Pro is the best GUI ...READ MORE

May 21, 2018 in Java by Akrati
 • 3,190 points • 2,216 views
0 votes
2 answers

How can we remove an element from an array in Java?

You can use ArrayUtils class remove method ...READ MORE

May 24, 2018 in Java by UshaK
 • 3,275 views
0 votes
2 answers

How do I use a Priority Queue

Use the constructor overload which takes a Comparator<? ...READ MORE

Oct 10, 2018 in Java by Sushmita
 • 6,920 points • 1,400 views
0 votes
1 answer

How can I make the return type of a method generic?

First of all, define callFriend: public <T extends ...READ MORE

May 19, 2018 in Java by sharth
 • 3,370 points • 1,135 views
0 votes
2 answers

Explain the functionality of Math.random() method.

You can use java.util.Random class. int myNumber = ...READ MORE

Aug 3, 2018 in Java by Sushmita
 • 6,920 points • 1,897 views
0 votes
2 answers

How can I solve java.lang.NoClassDefFoundError in Java?

NoClassDefFoundError means that the class is present ...READ MORE

Sep 11, 2018 in Java by Sushmita
 • 6,920 points • 34,889 views
0 votes
1 answer

Convert comma-separated String to ArrayList?

List<String> alist = Arrays.asList(str.split("\\s*,\\s*")); The above code splits ...READ MORE

May 17, 2018 in Java by sharth
 • 3,370 points • 4,035 views
0 votes
2 answers

Does Java allow to create static classes?

Java has "static nested classes", but they ...READ MORE

Sep 5, 2018 in Java by Sushmita
 • 6,920 points • 1,619 views
0 votes
1 answer

How to retrieve current stack trace?

Yes, in Java we do have a ...READ MORE

May 17, 2018 in Java by code.reaper12
 • 3,500 points • 2,159 views
0 votes
1 answer

Replacing a String with a character

Yes, you are missing out on a ...READ MORE

May 17, 2018 in Java by geek.erkami
 • 2,680 points • 968 views
0 votes
2 answers

I'm getting following error, while i'm running code in windows xp service pack 3 with JDK 6 version.

Till you send the code, I would ...READ MORE

May 16, 2018 in Java by Meci Matt
 • 9,460 points • 3,385 views
0 votes
1 answer

How can I get Key from their respective Values

public class NewClass1 { ...READ MORE

May 16, 2018 in Java by Parth
 • 4,640 points • 1,057 views
0 votes
2 answers

How can I sort values of a Map in Java using its key

Assuming TreeMap is not good for you ...READ MORE

Oct 10, 2018 in Java by Sushmita
 • 6,920 points • 1,741 views
0 votes
1 answer

How to split Strings by space in Java ?

You can use split() method. str = "Hello ...READ MORE

May 16, 2018 in Java by sharth
 • 3,370 points • 2,064 views
0 votes
1 answer

How to set a timer in Java?

To work on timer in java, you ...READ MORE

May 16, 2018 in Java by Daisy
 • 8,140 points • 1,570 views
0 votes
1 answer

Formatting Double Value in Java

An alternative is to use String.format: double[] arr = ...READ MORE

May 15, 2018 in Java by Rishabh
 • 3,620 points • 2,885 views
0 votes
1 answer

How to read and write on an excel files?

Follow these steps: Write: public class User { ...READ MORE

May 15, 2018 in Java by Rishabh
 • 3,620 points • 1,902 views
0 votes
2 answers

How do i create generic array in Java

as first tip you cannot assign value ...READ MORE

Feb 13, 2020 in Java by sama
 • 17,764 views
+2 votes
10 answers

Convert Java Byte Array - String - Byte Array

Character Stream Vs Byte Stream Character oriented are ...READ MORE

Sep 25, 2018 in Java by carldivin
 • 180 points • 11,574 views
+5 votes
11 answers

How to import a jar file in Eclipse?

Click on File > Import. The Import ...READ MORE

Aug 23, 2018 in Java by Daisy
 • 8,140 points • 366,069 views
0 votes
2 answers

How to call one constructor from another in Java?

public class Cons { public static Cons ...READ MORE

Jul 24, 2018 in Java by Akrati
 • 3,190 points • 1,986 views
0 votes
1 answer

How does omitting curly braces in Java program, effect the code ?

Using braces makes the code more maintainable ...READ MORE

May 14, 2018 in Java by Rishabh
 • 3,620 points • 3,468 views
0 votes
1 answer

What is Java Enterprise Edition ?

Is Java EE just a specification? What ...READ MORE

May 14, 2018 in Java by Rishabh
 • 3,620 points • 1,217 views
0 votes
1 answer

How to get the number of digits in an int?

You can find out the length of ...READ MORE

May 14, 2018 in Java by Akrati
 • 3,190 points • 1,380 views
0 votes
2 answers

How to convert byte array to String and STring to byte array?

The best possible way of conversion between byte[] and String is to ...READ MORE

Aug 22, 2019 in Java by Sirajul
 • 59,190 points • 4,142 views
0 votes
1 answer

What is the concept of Immutability for strings in Java ? Why are strings immutable ?

According to Effective Java, chapter 4, page 73, ...READ MORE

May 11, 2018 in Java by Rishabh
 • 3,620 points • 2,092 views
0 votes
2 answers

Result of character addition in Java

Binary arithmetic operations on char and byte ...READ MORE

Aug 22, 2019 in Java by Sirajul
 • 59,190 points • 5,379 views
0 votes
1 answer

How to reverse an int array in Java?

for(int i = 0; i < Data.length ...READ MORE

May 11, 2018 in Java by Akrati
 • 3,190 points • 1,314 views
0 votes
1 answer

Can Abstract Class have a Constructor?

Yes, an abstract class can have a ...READ MORE

May 11, 2018 in Java by sharth
 • 3,370 points • 1,577 views
0 votes
1 answer

What is ArrayIndexOutOfBoundsException ?

If You check System.out.print(names.length); you will get 3 ...READ MORE

May 11, 2018 in Java by sharth
 • 3,370 points • 1,440 views
0 votes
1 answer

How to connect Java program to the MySQL database?

You can connect your Java code with ...READ MORE

May 11, 2018 in Java by Parth
 • 4,640 points • 2,367 views
0 votes
1 answer

Comparable vs Comparator in Java

I think you are not alone who is ...READ MORE

May 11, 2018 in Java by code.reaper12
 • 3,500 points • 1,433 views
0 votes
2 answers

Fetch list of in-between dates using Java

BiFunction<LocalDate, LocalDate, List<CovidData>> stateDataBetweenDates = (startDate, endDate) ...READ MORE

Jul 9, 2022 in Java by Aqueeb Khan
edited Mar 5 • 6,483 views
0 votes
1 answer

How do I join 2 lists

This is not a simpler method, but ...READ MORE

May 11, 2018 in Java by sharth
 • 3,370 points • 1,147 views
0 votes
2 answers

Get all the permutations of a string in Java

You could use recursion to do this.  Try ...READ MORE

Aug 21, 2019 in Java by Sirajul
 • 59,190 points • 2,723 views
+1 vote
1 answer

Are arrays equivalent to objects in Java ?

Yes; the Java Language Specification writes: In the Java ...READ MORE

May 10, 2018 in Java by Rishabh
 • 3,620 points • 1,779 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 • 9,853 views
0 votes
2 answers

How to round up a value to 2 decimal places?

double d = 2.34568; DecimalFormat f = new ...READ MORE

Aug 30, 2018 in Java by Sushmita
 • 6,920 points • 1,801 views
+1 vote
3 answers

How to convert a List to an Array in Java?

Either: Foo[] array = list.toArray(new Foo[list.size()]); or: Foo[] array = ...READ MORE

Aug 7, 2018 in Java by Akrati
 • 3,190 points • 1,643 views
0 votes
2 answers

Exception found while using Thread.sleep() and wait() in Java

A simpler way to wait is to ...READ MORE

Aug 13, 2018 in Java by samarth295
 • 2,220 points • 10,326 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 • 1,648 views
0 votes
2 answers

Understand working of String Builder and String Buffer

Basically, StringBuffer methods are synchronized while StringBuilder ...READ MORE

Aug 29, 2018 in Java by Sushmita
 • 6,920 points • 1,426 views
0 votes
1 answer

Converting String and Float Data-types

Using Java’s Float class. float f = Float.parseFloat("25"); String s = ...READ MORE

May 9, 2018 in Java by developer_1
 • 3,350 points • 1,251 views
0 votes
2 answers

Is there a destructor in Java?

try (BufferedReader br = new BufferedReader(new FileReader(path))) ...READ MORE

Sep 4, 2018 in Java by Sushmita
 • 6,920 points • 1,382 views
0 votes
1 answer

What does Java option -Xmx stand for?

-Xmxn: It specifies the maximum size, in bytes, ...READ MORE

May 9, 2018 in Java by sharth
 • 3,370 points • 2,157 views
0 votes
1 answer

Why the main() method in Java is always static?

As you might know, static here is ...READ MORE

May 9, 2018 in Java by geek.erkami
 • 2,680 points • 2,562 views
0 votes
1 answer

Need for finalize() in Java

finalize() is a method called by the ...READ MORE

May 9, 2018 in Java by code.reaper12
 • 3,500 points • 1,041 views
+1 vote
3 answers

Copy Java Array and make a duplicate of it

int[] a = {1,2,3,4,5}; int[] b = Arrays.copyOf(a, ...READ MORE

Aug 30, 2018 in Java by Sushmita
 • 6,920 points • 2,270 views
0 votes
1 answer

Implement Tree(Datastructure) in Java

I wrote a small "TreeMap" class based ...READ MORE

May 9, 2018 in Java by sharth
 • 3,370 points • 1,828 views
0 votes
1 answer

Perform "Switch-case" on String in Java

Switches based on integers can be optimized ...READ MORE

May 8, 2018 in Java by Rishabh
 • 3,620 points • 1,295 views
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