We need to perform a type casting to convert long to int in Java since we want to convert a higher data type to a lower one. Java type casting is the process of changing one data type into another. See the following example: class Test { public static void main(String[] args) { long l…
Read More Convert Long to Int in JavaConverting double to String is a common task in Java programming. In many cases, you may need to convert a double value to a String to display it in a user interface, write it to a file, or pass it as an argument to a method that expects a String. Java provides several methods for…
Read More Convert Double to String in JavaConverting a Java String to a Double is a common task in Java programming. Whether you need to perform mathematical calculations or simply display numeric values, it’s important to know how to convert Strings to Doubles accurately and efficiently. In this tutorial, I will guide you through the process of converting a Java String to…
Read More Java String to a Double Conversion: Tips and Best PracticesWe can convert Java Long to String using the following methods: String.valueOf() method Long.toString() method Convert Java Long to String using the String.valueOf() method There are multiple overloaded versions of the valueOf() method from the String class. We will use the one which accepts a long data type. Example class Test { public static void…
Read More Convert Java Long to StringWe often have to extract some text that is a number. To perform some operations on that number, we must first convert it to the appropriate data type. In this post, you will learn how to convert Java String to long. The parseLong() method in Java is a static method that can be used to…
Read More Convert Java String to LongIn one of the previous posts, we covered the conversion of a Decimal to Hexadecimal. Here, you will learn how to convert Hexadecimal to Decimal in Java. We will explore the following ways: Using the parseInt() method Using custom logic Convert Hexadecimal to Decimal in Java using the parseInt() method Integer class has a static…
Read More Convert Hexadecimal to Decimal in JavaThere are two ways to convert Decimal to Hexadecimal in Java: Using the toHexString() method With a custom logic Convert Decimal to Hexadecimal in Java using the toHexString() method The easiest way is to use the ToHexString() static method of the Integer class to get the Hexadecimal String of a Decimal number. Example class Test { public…
Read More Convert Decimal to Hexadecimal in JavaIn this post, you will see how to convert Decimal to Binary in Java using the following ways: Using toBinaryString() method With custom logic Convert Decimal to Binary in Java using the toBinaryString() method There is a toBinaryString() method of the Integer class that we can use to get the Binary String of a Decimal…
Read More Convert Decimal to Binary in JavaWant to learn how to merge two ArrayLists in Java? In this post, we will cover the following ways: Using the List.addAll() method Using the Java 8 Streams Using the ListUtils.union() method Merge two ArrayLists in Java using the List.addAll() method There is addAll() method from the List interface that appends all of the elements in…
Read More How to merge two ArrayLists in Java?In this post, you will learn how to Serialize and Deserialize an ArrayList in Java using the FileOutputStream and FileInputStream classes. How to Serialize an ArrayList in Java? Serialization is the process of changing the state of an object into a byte stream. For example, we use it to write some Java objects into a file. In…
Read More Serialize and Deserialize an ArrayList in JavaIn one of the previous examples, we covered how to sort an ArrayList in ascending order. In this post, you will learn how to sort ArrayList in descending order in Java. We will explore the following ways: Using the sort() method Using the Collections.sort() and Collections.reverse() methods Sort ArrayList in descending order in Java using the…
Read More Sort ArrayList in descending order in JavaThere are multiple ways to convert a String to an array in Java. We can convert it to a char array or String array. Convert a String to a char Array The String class, a fundamental data type in Java, has the useful toCharArray() method that enables the conversion of a String to a char array.…
Read More Convert a String to an Array in JavaIn this post, you will learn to check if a String contains only digits in Java. We will cover two methods: Using the Character.isDigit() method Using the Integer.parseInt() method Check if a String contains only digits in Java using the Character.isDigit() method In this example, we use a for loop to iterate over the elements…
Read More Check if a String contains only digits in JavaWe often need to compare two ArrayList in Java. In this post, you will learn how to do that in two ways: Using the ArrayList.equals() method Using the CollectionUtils.isEqualCollection() method Compare two ArrayList in Java using the ArrayList.equals() method The ArrayList.equals() method compares two ArrayList. It compares the sizes of the lists, elements equality, and the…
Read More Compare two ArrayList in JavaIn this tutorial, you will learn how to convert ArrayList to an Array in Java using two methods: Using a for loop – I will show you how to use a ‘for loop’ to go through an ArrayList and move everything over to an Array. It’s like packing your things into a new suitcase one item at a…
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