Java conversions

In this post, we will be looking at different ways of converting a string object into a double value. In some of the methods listed below, we will be converting the string object into the Double wrapper class object and then using the unboxing feature of Java, that Double class object will be converted into […]

There are many ways to convert a double value into a string in Java. Double.toString() method String.valueOf() method Using + operator Using StringBuilder or StringBuffer append() function Using DecimalFormat Let’s look at all of the ways one by one Double.toString() method Java has a wrapper class Double over the double primitive type and that wrapper

Before proceeding, there are few points that we should know about While converting double to an int, the decimal values will be lost ( 3.14 would be converted 3 ). Second, whether we want to convert our double to a floor int value ( means converting 3.14 to 3) or a ceil int value (

There are different ways of converting a long to an int in Java. Math.toIntExact() method intValue() method Using Strings There is a reason that our list does not contain direct typecasting of long into an int because it can lead to integer overflow and you may end up using the wrong value. Below is an

In this post, we will be looking at different ways of converting String to long in Java. We will first convert the String object into the Long wrapper class object in Java and but because of the unboxing feature of Java, that Long object will automatically be converted into the long primitive data type value.

In this post, we will be looking at different ways of converting String to int in Java. In most of the cases, we will convert the string Object into the Integer wrapper class object but because of the unboxing feature of Java, that Integer object will automatically be converted into the int primitive data type

There are many scenarios where we may be required to convert a long to a String. This post will discuss how we can convert a long integer to a string type in Java. Long.toString() method String.valueOf() method Using + operator Using StringBuffer or StringBuilder append() function String.format method Let’s look at all the above methods

This post will look at various ways of converting an int to a String in Java. Below are some of the many ways of converting an int to a String – Integer.toString() method String.ValueOf() method Using + operator Using StringBuffer or StringBuilder append() function String.format() method Let’s look at all of the ways one by

We often come up with requirements where we need to convert the list into a map. In this article, we will learn how to do it before and after Java 8. To understand this, we will be creating a Person class with attributes – id, firstName, lastName, and age. Declaration of Person class Now we