Latest questions in Java

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How do I check if a string contains a substring in Java?

Hi@akhtar, The first and foremost way to check ...READ MORE

Dec 30, 2020 in Java by MD
• 95,060 points
119 views
0 votes
1 answer

How to convert Java String into byte[]?

The object your method decompressGZIP() needs is a byte[]. So the ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
66 views
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1 answer

How to install the JDK on Ubuntu Linux?

Open Terminal from Application Dash or press Ctrl+Alt+T Update repository: sudo add-apt-repository ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
69 views
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1 answer

How do I count the number of occurrences of a char in a String?

My 'idiomatic one-liner' for this is: int count ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
189 views
0 votes
1 answer

Unsupported major.minor version 52.0

The issue is because of a Java ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
70 views
0 votes
1 answer

SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”

I had the same issue with WebSphere ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
563 views
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1 answer

How to read all files in a folder from Java?

public void listFilesForFolder(final File folder) { ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
38 views
0 votes
1 answer

How to append text to an existing file in Java?

Java 7+ If you just need to do ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
303 views
0 votes
1 answer

Removing whitespace from strings in Java

st.replaceAll("\\s+","") removes all whitespaces and non-visible characters (e.g., ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
66 views
0 votes
1 answer

How do I save a String to a text file using Java?

If you're simply outputting text, rather than ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
40 views
0 votes
1 answer

How to convert a Set to List in Java?

Hi@MD, The most straightforward way to convert a ...READ MORE

Dec 30, 2020 in Java by akhtar
• 38,170 points
36 views
0 votes
1 answer

How to get the current date/time in Java?

It depends on what form of date/time ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
40 views
0 votes
1 answer

Implements vs extends: When to use? What's the difference?

Extends is for extending a class. implements are for implementing an interface The difference between ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
40 views
0 votes
1 answer

How do I convert from int to String?

Normal ways would be Integer.toString(i) or String.valueOf(i). The concatenation will work, ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
28 views
0 votes
1 answer

How do I join two lists in Java?

In Java 8: List<String> newList = Stream.concat(listOne.stream(), listTwo.stream()) ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
24 views
0 votes
1 answer

How do I copy an object in Java?

Create a copy constructor: class DummyBean { ...READ MORE

Dec 30, 2020 in Java by Gitika
• 65,870 points
26 views
0 votes
1 answer

How to remove the last character from a string?

Hi@akhtar, You can use the StringBuffer class. It provides ...READ MORE

Dec 30, 2020 in Java by MD
• 95,060 points
87 views
0 votes
2 answers

Reading a plain text file in Java

Read a plain text file: Java Code: import java.io.BufferedReader; import ...READ MORE

Dec 28, 2020 in Java by Nikita
39 views
0 votes
2 answers

When to use static methods

Java main() method is always static, so that compiler ...READ MORE

Dec 28, 2020 in Java by Reshma
43 views
0 votes
3 answers

How to check if a String is numeric in Java?

Check if a string is numeric public class ...READ MORE

Dec 28, 2020 in Java by Carlos
86 views
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2 answers

Java string to date conversion

We can convert String to Date in java using parse() method ...READ MORE

Dec 28, 2020 in Java by Nikita
58 views
0 votes
4 answers

How do I check if a file exists in Java?

To test to see if a file ...READ MORE

Dec 28, 2020 in Java by Rajiv
• 8,880 points
58 views
0 votes
4 answers

How to convert a char to a String?

There are two ways you can do ...READ MORE

Dec 28, 2020 in Java by Roshni
• 10,420 points
60 views
0 votes
2 answers

How to make a new List in Java?

Initializing a List in Java The Java.util.List is a child ...READ MORE

Dec 28, 2020 in Java by Thomas Walenta
47 views
0 votes
2 answers

File to byte[] in Java?

Example 1: Convert File to byte[] import java.io.IOException; import ...READ MORE

Dec 28, 2020 in Java by Reshma
33 views
0 votes
1 answer

Can anyone help me i have been struggling for weeks now to solve this problem

Hello, @Tafadzwa, Any way just navigate to C:\Users\user.gradle\caches\ ...READ MORE

Dec 24, 2020 in Java by Gitika
• 65,870 points
36 views
0 votes
1 answer

Static Classes In Java

Java has static nested classes but it sounds like ...READ MORE

Dec 23, 2020 in Java by Gitika
• 65,870 points
34 views
0 votes
1 answer

Can't execute jar- file: “no main manifest attribute”

First, it's kind of weird, to see ...READ MORE

Dec 23, 2020 in Java by Gitika
• 65,870 points
379 views
0 votes
1 answer

Download a file with Android, and showing the progress in a ProgressDialog

1. Use AsyncTask and show the download progress in ...READ MORE

Dec 23, 2020 in Java by Gitika
• 65,870 points
73 views
0 votes
1 answer

Converting array to list in Java

In your example, it is because you ...READ MORE

Dec 23, 2020 in Java by Gitika
• 65,870 points
39 views
0 votes
1 answer

How to install Java 8 on Mac

Oracle has a poor record for making ...READ MORE

Dec 23, 2020 in Java by Gitika
• 65,870 points
230 views
0 votes
1 answer

Convert ArrayList<String> to String[] array

Use like this. List<String> stockList = new ArrayList<String>(); stockList.add("stock1"); stockList.add("stock2"); String[] ...READ MORE

Dec 22, 2020 in Java by Gitika
• 65,870 points
46 views
0 votes
1 answer

Sort ArrayList of custom Objects by property

Since Date implements Comparable, it has a compareTo method just like String does. So your ...READ MORE

Dec 22, 2020 in Java by Gitika
• 65,870 points
55 views
0 votes
1 answer

How to round a number to n decimal places in Java?

Use setRoundingMode, set the RoundingMode explicitly to handle your issue ...READ MORE

Dec 22, 2020 in Java by Gitika
• 65,870 points
267 views
0 votes
1 answer

What does “Could not find or load main class” mean?

First of all, you need to understand ...READ MORE

Dec 22, 2020 in Java by Gitika
• 65,870 points
66 views
0 votes
1 answer

How does the Java 'for each' loop work?

for (Iterator<String> i = someIterable.iterator(); i.hasNext();) { ...READ MORE

Dec 22, 2020 in Java by Gitika
• 65,870 points
61 views
0 votes
1 answer

Iterate through a HashMap.

Iterate through the entrySet() like so: public static void printMap(Map ...READ MORE

Dec 22, 2020 in Java by Gitika
• 65,870 points
39 views
0 votes
1 answer

How do I generate random integers within a specific range in Java?

Before Java 1.7, the standard way to ...READ MORE

Dec 22, 2020 in Java by Gitika
• 65,870 points
58 views
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1 answer

How to create create an ArrayList from array?

new ArrayList<>(Arrays.asList(array)); READ MORE

Dec 21, 2020 in Java by Gitika
• 65,870 points
35 views
0 votes
1 answer

What are the differences between a HashMap and a Hashtable in Java?

There are several differences between HashMap and Hashtable in Java: Hashtable is synchronized, whereas HashMap is ...READ MORE

Dec 21, 2020 in Java by Gitika
• 65,870 points
106 views
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1 answer

Avoiding NullPointerException in Java

This to me sounds like a reasonably ...READ MORE

Dec 21, 2020 in Java by Gitika
• 65,870 points
36 views
0 votes
1 answer

Why is subtracting these two times (in 1927) giving a strange result?

In TZDB 2014f, the time of the ...READ MORE

Dec 21, 2020 in Java by Gitika
• 65,870 points
36 views
0 votes
1 answer

How do I determine whether an array contains a particular value in Java?

Arrays.asList(yourArray).contains(yourValue) Warning: this doesn't work for arrays of ...READ MORE

Dec 21, 2020 in Java by Gitika
• 65,870 points
33 views
0 votes
1 answer

Initialization of an ArrayList in one line.

Actually, probably the "best" way to initialize ...READ MORE

Dec 21, 2020 in Java by Gitika
• 65,870 points
49 views
0 votes
1 answer

When to use LinkedList over ArrayList in Java?

LinkedList and ArrayList are two different implementations of the List ...READ MORE

Dec 21, 2020 in Java by Gitika
• 65,870 points
48 views
0 votes
1 answer

Is it possible to upload a file from desktop to web using Selenide?

Hi, @Nikhil, Yes it's possible to drop a ...READ MORE

Dec 16, 2020 in Java by Gitika
• 65,870 points
38 views
0 votes
1 answer

What does Animal a = (Animal) data[0]; do?

Hello @zaraaq , You can refer this for your ...READ MORE

Dec 2, 2020 in Java by Niroj
• 82,560 points
58 views
0 votes
1 answer

Logger cannot be resolved Java(570425394) Error occured

Hey, @Boopathy, Could you please post your code ...READ MORE

Dec 1, 2020 in Java by Gitika
• 65,870 points
269 views
0 votes
0 answers

I have Added all External JAR files but driver not found exception occured

Exception in thread "main" java.lang.Error: Unresolved compilation ...READ MORE

Nov 29, 2020 in Java by Boopathy
• 350 points
112 views
0 votes
1 answer

Maven project using testng dependecy

Hello @zaraaq, First try to replace the scope ...READ MORE

Nov 25, 2020 in Java by Niroj
• 82,560 points
164 views