A final class in Java is a class that cannot be subclassed. When a class is declared as final, it prevents any other class from extending it. This feature is particularly useful when you want to create immutable
In the above-given example, we can see how a final class can be used effectively. The output of the above-given program is given below. Output: Example #3 In this example, the final class inherits the other class, i.e., Student, but no other classes can extend the Info class because...
Simply the compiler will throw an error because we already know a final class in java cannot be inherited or extended. Let’s now see this with the help of an example given below to make a good understanding of the concept – Code Implementation of Final Class in Java Java importjava.util...
$ javac Example.java Example.java:10: error: cannot inherit from final Hello class Awesome extends Hello { ^ 1 error Example #2 In the following example we have a final classBoxthat can't be inherited. We also have theGiftBoxclass that uses the method of theBoxclass. ...
Final Keyword in Java Examples Certainly, let’s explore more examples to illustrate the usage of the final keyword in different contexts within Java. Example 1: Final Variables public class Circle { final double PI = 3.14159; double radius; Circle(double radius) { this.radius = radius;...
can be shared. For example: * * ...其他略... * */ public final class String ...
final class FinalClass {// ...}class Example {final int constantValue = 42;final void finalMethod() {// ...} finally: finally是一个关键字,用于结构化异常处理中的try-catch-finally语句块。 无论是否发生异常,finally语句块中的代码都会被执行,通常用于释放资源、关闭文件等操作。
In this example,MAX_VALUEis afinalvariable. Attempting to reassign it will result in a compilation error. Example 2:finalMethod classParent{publicfinalvoiddisplay(){System.out.println("This is a final method.");}}classChildextendsParent{// public void display() { // This will cause a compil...
the final class cannot be extended 1. Java final Variable In Java, we cannot change the value of a final variable. For example, classMain{publicstaticvoidmain(String[] args){// create a final variablefinalintAGE =32;// try to change the final variableAGE =45; ...
In this tutorial, we’ll take a look at what thefinalkeyword means for classes, methods, and variables. 2.FinalClasses Classes marked asfinalcan’t be extended.If we look at the code of Java core libraries, we’ll find manyfinalclasses there. One example is theStringclass. ...