What is the use of anonymous classes in java? Can we say that usage of anonymous class is one of the advantages of java?
|
When using an anonymous inner class as a PropertyChangeListener at what point in the object life cycle is the class garbage collected? After the containing class (SettingsNode) is reclaimed? Should I ... |
In some of my projects and in some books was said to not use inner class (anonymous or not, static or not) - except in some restricted conditions, like EventListeners or ... |
When run through javac on the cmd line Sun JVM 1.6.0_20, this code produces 6 .class files
OuterClass.class
OuterClass$1.class
OuterClass$InnerClass.class
OuterClass$InnerClass2.class
OuterClass$InnerClass$InnerInnerClass.class
OuterClass$PrivateInnerClass.class
When run through JDT in eclipse, it produces only 5 classes. ... |
Is there a way to annotate an anonymous inner class in Java?
In this example could you add a class level annotation to Class2?
public void method1() {
add(new Class2() {
...
|
Is my interpretation of lambda expression in the context of c++ and Java is correct?
|
Java compiler complains when you write a code that is unreachable. For example
public void go()
{
return;
System.out.println("unreachable");
}
However, when you define a new method in an ... |
|
Disclaimer: this is a homework question.
Ok, I'm being asked to transform an anonymous button class into an inner button class. The text I'm given to read discusses this topic using examples ... |
While learning TTS on Android, I came across the following code snippet:
speakBtn.setOnClickListener(new OnClickListener() {
@Override
...
|
Consider this (anonymous):
speakBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
mTts.speak(words.getText().toString(), TextToSpeech.QUEUE_ADD, null);
}});
vs. ... |
class One {
Two two() {
return new Two() {
Two(){}
Two(String s) {
...
|
is there any way to initialize anonymous inner class in Java? For example:
new AbstractAction() {
actionPerformed(ActionEvent event) {
...
}
}
Is there any ... |
rb.addActionListener(new ActionEvent(ae) {
public void actionPerformed(ActionEvent ae) {
nowCall(ae);
}
});
Another way
Thread th=new Thread(Runnable r) {
public void run() {
...
|
Im' running this code on a Linux Red Hat with the sun/oracle JVM 1.6_23, inside a VMWare server.
After some times the JVM seem to be unable to access my anonymous inner ... |
I have these line of code and I want to disable the button after a passenger has been added. I want to disable the button. seats[i].setEnabled(false) won't work since it's inside ... |
Here is an example
JPanel panel = new JPanel(){
@Override
protected void paintComponent(Graphics g){
// do stuff
...
|
What is the best practice way of getting Exception Transparency in Java when using an anonymous inner class to run some code.
A frequent pattern that I have seen in real ... |
public abstract class Category { public static final Category SOMEOBJECT= new Category(1, "Locale") { public List getList(Context context, HttpServletRequest request) { //return one list of whatever return new ArrayList(); } }; public static final Category SOMEOBJECT2= new Category(1, "Locale") { public List getList(Context context, HttpServletRequest request) { //return a custom list of whatever return new ArrayList(); } }; public int getId() ... |
Hi Friends, im not aware with Inner class and Anonymous class in java so give me a sample code in java for both and some explanations about the both classess to get an good understanding of both the classess.And what is the difference between them? plz help me friends with regards prasath |
TestCase test= new MoneyTest("simple add") { public void runTest() { testSimpleAdd(); } }; First of all this not related to JUnit . I am not getting this code . It is refered as a anonymous inner class in the tutorial . Other code related to this is there is a classs MoneyTest that extended a class TestCase of JUnit & that ... |
this is about anonymous inner classes (aic) within a method. So it has access to the enclosing methods final variables. Have you guys been able to achieve cool things with this feature (ability to access final variables outside the class definition). Please do post some examples and how difficult it would have been to do the same thing if this feature ... |
If an inner class defined in a method accesses local variables defined in that method, then those local variables must be final. Final variables, of course, have a single value that never changes. This means you can make a copy of them at any time and you won't be able to tell that you're using a copy instead of the original. ... |
|
|
|
|
Hi there, See the code below. Can you please explain the meaning of the stmt #9 and why I am unable to print as I was trying to do at line # 12. thanks siva 1 class Outer { 2 int i = 30; 3 } 4 5 6 class Test { 7 public static void main( String[] args){ 8 9 ... |
first i must say thank you for the wonderful illustration and sorry for my poor coding which is due to carelessness. i would feel more easy if you could give some examples of the external influences that affect the state of the object returned by the aMethod() and whether your principle could also explain the reason why local inner class enclosed ... |
Hello, I have a question on the following code class myInner { void go() { Bar b = new Bar(); b.doStuff(new Foo() // Start of argument-defined inner class { publicvoid foof() { System.out.println("fluffy"); } }); } public static void main (String [] arg) { myInner e = new myInner(); e.go(); } } interface Foo { public void foof(); } class Bar ... |
|
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - ... |
If you wanted to hook the same code to multiple events you would be better off with a named inner class than an anonymous inner class. I also have a rule just based on how the code looks - if an event handler is just a few lines long (say 5 or less) then I'll just embed it inline with an ... |
|
|
If you want to use the name of a class in your code, then you don't want it to be anonymous, right? Doesn't make sense to create a class with no name, and then work hard at figuring out its name. Just create a named inner class. You know you can create a class right inside a method, yes? public void ... |
Which is true about an anonymous inner class? A. It can extend exactly one class and implement exactly one interface. B. It can extend exactly one class and can implement multiple interfaces. C. It can extend exactly one class or implement exactly one interface. D. It can implement multiple interfaces regardless of whether it also extends a class. E. It can ... |
Every once in awhile I come across an anonymous inner class, especially for comparators. My question is why bother with this type of class? What do I get out of using it? Is the only reason to avoid a bunch of extra java files? or a bunch of extra classes in a single java file? Don't they all get compiled to ... |
|
How to call a method which is inside of anonymous inner class ? Thanks in advance. class TestTop { public void pop() { System.out.println("the class TestTop with pop() method"); } } class AnotherTest { TestTop t = new TestTop() { public void pop() { // <=== how to call the method pop() System.out.println("the class AnotherClass with pop()"); } }; AnotherTest at ... |
|
|
In your first example, you override the method m() of A. so when you call x.m(), the overridden method is called and it prints "B". But in the second, you have a new method m1(). so when you call x.m(), the inherited method is called and prints 'A'. And i doubt whether you can call it as " static inner class ... |
new XXX() in case of anonymous classes means, a new instance of a class that implements XXX, if XXX is an interface or it is a class that extends XXX, if it is a class. Anonymous class dont need a name,right...so the designers decided to stick to just the name of the implementing interface/extending class. |
Good Morning All, I have made it through several Java books and I am reading another one, and started to wonder about something. Some books illustrate the use of an anonymous inner class to do something (in most cases it's an action listener) and some use known inner classes. Two questions come to mind: 1) Which is the better choice and ... |
>>>Inner classes can be created within methods. This is something that GUI builders like Borland JBuilder do a great deal of when creating Event handlers. Here is an example of such automatically generated code buttonControl1.addMouseListener(new java.awt.event.MouseAdapter() { public void mouseClicked(MouseEvent e) { buttonControl1_mouseClicked(e); } }); >>> As you might guess an anonymous class cannot have be given a constructor by the ... |
|
// Create a send email task. Callable emailTask = new Callable() { @Override public Object call() throws Exception { //Send E-Mail. return new EMail(mailProps) { @Override protected String getSubject() { return MessageFormat .format( emailNodes[0], String.valueOf(runId)); } @Override protected String getBody() { return MessageFormat .format(emailNodes[1], String.valueOf(runId), zipArchivePath.getPath()); } @Override protected String[] getRecipients() { return toEmailAddresses.split(","); } @Override protected String getFromAddress() { return ... |
|
|
|
|
Well, what are you passing into that method? There's no way we can look at the code you've posted, and work out what the input is, what you've done with it, whether you've actually added it to the canvas, or what. As far as I can see, there's no reason why it won't find anything in that code. Prove some other ... |
Hello In the following piece of code: import static tools.Print.*; interface ForInner { void who(); String toString(); } class ForInnerWithParameters { int i; String s; ForInnerWithParameters(int i) { this.i = i; } } class NackedClass { public ForInner inner() { return new ForInner() { private int i; { print("Inside inner class!"); i = 10; } public int getI() { return i; ... |
|
|
Help me understand the following piece of code. //: innerclasses/Parcel8.java // Calling the base-class constructor. public class Parcel8 { public Wrapping wrapping(int x) { // Base constructor call: return new Wrapping(x) { // Pass constructor argument. public int value() { return super.value() * 47; } }; // Semicolon required } public static void main(String[] args) { Parcel8 p = new Parcel8(); ... |
|
|
can any one plz give me code for the following write a program create an interface U with three methods.Create a class A with a method that produces a reference to a U by building an anonymous inner class. Create a second class B that contains an array of U. B should have one method that accepts and stores a reference ... |
|
We talked about inner classes in lecture today and I was making a project with a GUI. I'm not sure why I decided to try and use it with a JMenuBar, but really I was just trying to get a feel for how they worked. I ended up using them with ActionListener. Thanks, and sorry for the stupid question haha. |
|
actually i am writing anonymous inner class to over load toByteArray() method of ByteArrayOutputStream class. my code follows ByteArrayOutputStream baos = new ByteArrayOutputStream(); //assiging some value to baos //overloading the method byte[] wholeMessage= baos.toByteArray(new ByteArrayOutputStream() { public byte[] toByteArray(int offset,int length1) { byte abyte0[] = new byte[length1]; System.arraycopy(buf, offset, abyte0, 0, length1); return abyte0; } }); can any body point me ... |
|