final keyword in java.

this post will help users understand about final keyword in the java programming language.

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1. final keyword is used to restrict users .
2. final keyword can be used with variables, methods and classes and method parameters.
3. final variables are usually used as constant in java, as their value can not be changes .
4. final variables can only be assigned once and we can use constructor to assign their values .
5. if we try to change the final variable it gives us the compile time error.

// Online Java Compiler
// Use this editor to write, compile and run your Java code online

class HelloWorld {
    public static void main(String[] args) {
     FinalTest finalTest= new FinalTest("test");
     System.out.println(finalTest.name);
    }
}
class FinalTest{
    public final String name;
    public String lname;
    
    FinalTest(String name){
        this.name=name;
    }
    
    public void setName(String name){
        System.out.println("name cann't be set here");
    }
    
    public void setLName(final String name){
    this.lname=name;
    }
}