package com.howtodoinjava.demo.serialization; import java.io.*; import java.util.logging.Logger; public class DemoClass implements java.io.Serializable { private static final long serialVersionUID = 4L; //Default serial version uid private static final String fileName = "DemoClassBytes.ser"; /...
Pattern matching has already been used in regular expressions. But this feature was extended to theinstanceofoperator in JEP 394 for Java 16. Thanks to pattern matching forinstanceof, instead of introducing a local variable, assigning the given expression, casting it to specific type, and only t...
Function<String,String>toUpperCase=x->x.toUpperCase();pets.stream().map(x->toUpperCase.apply(x)).forEach(System.out::println); Copy When you define afunctionyou have to specify the input and output types. In our example, both are strings. That’s why the first line starts withFunction<S...
We have twocharvariables,char1has a lowercase character whilechar2have an uppercase character. To convertchar1to an uppercase character, we call thetoUpperCase()static method from theCharacterclass and passchar1as an argument. The same goes to convertchar2to lowercase; we call thetoLowerCase()...
const str = "JavaScript Courses" const newStr = str.replace('JavaScript', 'Java') console.log(newStr) // Java Courses To perform a global search to replace all occurrences of a string, you can use a regular expression with a global modifier:const str = "Mr. Red owns a red bike and...
In JavaScript, you can use theArray.map()method to iterate over all elements and then use the string methods to change the case of the elements. Here is an example that demonstrates how to use theString.toUpperCase()method along withArray.map()to uppercase all elements in an array: ...
HelloWorld-To-UpperCase -Confirm"stringtouppercase" PowerShell keeps asking for that if we don’t provide the text argument. You can use several flags to control the parameters in your functions, as shown in the followingParameterattribute syntax. ...
(cat=java streams) since its introduction in java 8, the stream api has become a staple of java development. the basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use. but these can also be overused and fall into some common pitfalls. to ...
String str = "howtodoinjava.com"; Assertions.assertEquals('h', str.charAt(0)); To get the last character of the String, use the String.length() and subtract 1 to get the last valid index in the string. Assertions.assertEquals('m', str.charAt(str.length() - 1)); Similarily, we ...
Since we have to capitalize first letter here, we will use str.charAt(0) to extract first letter from the String. 1 2 3 4 5 const str = 'java2blog'; const firstChar = str.charAt(0); console.log(firstChar); Output: J toUpperCase() toUpperCase() function returns all input charact...