Examples of using Java 8 features To illustrate how these Java 8 features work in practice, let's dive into some real-world Java 8 code examples. We'll explore scenarios where lambda expressions, method references, streams, and the Date and Time API can be applied to solve common programmin...
A good solution to fixnullproblems is always initializing an object reference with some value, and never withnull. In this way, we will never encounterNullPointerException. Fair enough. But in practice, we always don’t have a default value for a reference. So, how should those cases be h...
This code looks pretty reasonable. However, many computers (for example, the Raspberry Pi) don't actually ship with a sound card. So what is the result ofgetSoundcard()? A common (bad) practice is to return the null reference to indicate the absence of a sound card. Unfortunately, this ...
Avoiding excessive use of null is a good practice. For example, it’s preferable to return empty arrays or collections from methods instead of nulls, since it can help prevent NullPointerException. Consider the following method that traverses a collection obtained from another method, as shown be...
Comparable interface is a great example of Generics in interfaces and it’s written as: packagejava.lang;importjava.util.*;publicinterfaceComparable<T>{publicintcompareTo(To);} Copy In similar way, we can create generic interfaces in java. We can also have multiple type parameters as in Map...
For example to do a factorial we just need a function which multiplies the accumulator by the next value: 1 2 3 4 5 6 7 8 9 10 public class Factorial { public static void main(String[] args) { int n = 6; System.out.println(IntStream.rangeClosed(1, n) .reduce((x, y) -> x...
To understand a programming language you must practice the programs, this way you can learn any programming language faster. This page includes java programs on various java topics such as control statements, loops, classes & objects, functions, arrays etc. All the programs are tested and provided...
this example, as with the object stream in the Event example, the namespace prefix is added to both the opening and closing HTML tags. Adding this prefix is not required by the StAX specification, but it is good practice when the final scope of the output stream is not definitively known...
Fast development: For example, it used to take four or five days to develop a function, but now it takes two or three days, and the process is visualized, and the function logic is clear at a glance. Fast and worry-free deployment: It used to take 1~2 hours to deploy, but now it...
For example, a DSA private key may be specified by its components x, p, q, and g (see DSAPrivateKeySpec), or it may be specified using its DER encoding (see PKCS8EncodedKeySpec).The KeyFactory and SecretKeyFactory classes can be used to convert between opaque and transparent key ...