Java Archives - Page 14 of 18

How to initialize HashSet in java

We have many ways to initialize HashSet in java. HashSet can be initialized in one line, Using constructors, Using Arrays. 1. Initialize HashSet using Constructors

package com.kscodes.sampleproject;

import java.util.HashSet;

import java.util.Set;

public class HashSetInitalize {

public static void main(String[] args) {

Set<String> hashSet = new HashSet<>();

hashSet.add("Java");

hashSet.add("Spring");

hashSet.add("Hibernate");

hashSet.add("JavaScript");

System.out.println(hashSet.toString());

}

How to check if File is Directory in Java

We have 2 ways to check if file is Directory in java 1. java.io.File API’s isDirectory() method 2. java.nio.file.Files API’s [c

How to check if file is Hidden in java

To check if file is hidden in java, we use java.io.File API’s isHidden() method. In this post we will see example of how we use isHidden method i

How to get Creation Time of File in Java

To get creation time of file in java we can use the java.nio.file.Files API’s readAttributes() method. Example : Get Creation Time of File in Java [crayon-68e

How to get File size in java

We can get File size in java by 2 methods. 1. java.io.File API’s length() method 2. java.nio.file.Files API’s [crayon-68eb

How to convert ArrayList to HashSet

In this post we will see examples to convert ArrayList to HashSet in java. HashSet and ArrayList are both Collection objects. Hence we can pass ArrayList to the construtor of the HashSet and get it

How to convert ArrayList to Array

In this post we will see examples on how to convert ArrayList to Array in java. To convert ArrayList to Array we will use the toArray method from ArrayList.

1	public <T> T[] toArray(T[] a)

Example

Category: Java