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Questions tagged [final]

final is a common keyword specifying that the reference declared as final cannot be modified once it is initialized. In Java the keyword final is roughly equivalent to const in C++. In C++ the final keyword allows you to declare a virtual method, override it N times and then mandate that 'this can no longer be overridden'.

Refer to how the final keyword is used in different programing languages

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How to prevent an ArrayList to be Structually Modified?

I am mapping a Table... say Employee to an ArrayList which is a class level variable and I will be using it in multiple places instead of hitting the Data Base each time. I want to keep it as read only, ie. no one can add or remove an…
Zeeshan
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Java - initializing instant member through a final method

I am initializing an instance variable through a final method with this code: public class Whatever { private int myVar = initializeInstanceVariable(); protected final int initializeInstanceVariable() { return 10; } public…
user3370587
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Is it ok to use 'this' in final instance variable declaration?

Is it OK to use the this keyword in a final instance variable declaration/initialization in Java? Like this: private final SomeClass foo = new SomeClass(this); It worked when I tried it out. And since it is not a static variable I guess it should…
Guppel
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how to get final each loops number in JQuery

I've a simple each loop and I want count loops of this while,and find The final number then save counter variable and use in my codes, how can do posible...??! var counter = 0; $.each(data, function( key, value) { counter++; if(counter ==…
MojtabaSh
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final vs non final for normal variables

Please consider the following context (It is a snippet of Android code) TextView tvTitle = findViewById(R.id.something); // do stuff with 'tvtitle' In this context suppose both final declaration and non-final declaration is okay and works fine. My…
frogatto
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Have set int as final but final int cannot be assigned

I am a beginner with both java and android. In an app I was trying to make, I was using the following for loop: for(int current = 0; current < cityDetailsArray.size(); current++) { row = new TableRow(this); OnClickListener…
Harikrishnan
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Remove redundancy in codes due to the final operator?

Okay, so I'm creating an Android program with multiple threads. Now, when I'm in the second thread and want to interact with 'things' in the first, I need to use the following code: new Handler().post(new Runnable() { @Override public…
Keir Simmons
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Android - How can implement onClickListener in a loop of dynamically creating imageview

How can implement onClickListener in a loop of dynamically creating ImageView. In the code below, I have declared an imageview as "final". Since the imageview is "final", imageView=new ImageView(CurrentActivity.this) is not possible in loop. But if…
Eldho NewAge
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What is the purpose having final keyword in method parameter?

I recently saw a method like public void display(final String toDisplay){ } I want to know the purpose of final keyword in method parameter.
Nick Div
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At what point can a final variable in Java no longer be modified?

Take this block of code for example: private final House house; public static void main(String[] args) { house = new House("Robinsons"); house.setColor("Red"); } Would this be a valid use of a final variable? Is it legal to modify it once…
SaxSalute
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generics and keyword final

Whu Do it is a non-valid construction class A >{} out: java: java.lang.Comparable cannot be inherited with different arguments: and but it is valid class A
gstackoverflow
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How to create Java field annotations for final variables in my Interface

Can I create annotations for the final variables in my interface and access the same? For Example I have the below Annotation & Interface: import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import…
ams2705
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How to make an array final?

I cannot seem to figure out this error that says "world must be declared final". Any advice? I am making a gridworld project (matching game). The segment temparray.add(world.getLocation().getColor() ); requires it to be final... But adding final…
user3381138
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The final local variable cannot be assigned: Android

My program reads data from socket and now I want to display that data in a textbox. I splitted the data into seperate variables and here is my code: final int aData = 0; final int aData = 0; …
MKS
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Final in android Java

Hi am new to android development and have been watching The New Bostons Videos and have a question about the final modifier. Why when I type something like this TextView display = (TextView) findViewById(R.id.tvResults); display.setText("LEFT!!!");…
Neil M.
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