I would like to use Class.newInstance() but the class I am instantiating does not have a nullary constructor. Therefore I need to be able to pass in constructor arguments. Is there ... |
I've tried to use the code Sun posted on their Proxy usage page, and I tried to use the DebugProxy to print which method is invoked. The thing ... |
I have an enum class like this:
public enum Position {
A1(0,0),
A2(1,0),
//etc
public final int dy, dx;
...
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class Foo {
final String s;
final int x = s.length();
Foo(String s) {
this.s ...
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I can't decide which approach is better for creating objects with a large number of fields (10+) (all mandatory) the constructor approach of the getter/setter. Constructor at least you enforce that ... |
I've found a task on some Java programming competition. One must create class Sentence with only one argument 'text' and only one constructor. Here's sample test code :
Sentence s1=new Sentence("only","CAT"),
...
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I have Constructor Tree(int a, int b, int c) and second Constructor Tree(int a, int b, int c, String s). How to load second constructor from first just to save writing ... |
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Can any one explain me the basic need of default no argumnet constructor in many Java related APIs. Like as a general rule all java bean classes or entity classes (JPA ... |
EnumMap class constructor needs class as the argument. Most of the times K.class passed as the argument. I am still not getting what is the reason for accepting this as argument ... |
Is it possible to create a constructor with arguments on a JavaFX class?
This can be achieved in Java by:
MyObj(String foo, String bar) {
...
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Consider the following code,
public class StartUp {
public StartUp(String[] test){}
public static void main(String[] args) throws Exception{
...
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For example I have a class that builds the GUI, a class that handles all the events for the GUI and the main class that holds all the objects that are ... |
I'm trying to modify a private field inside a class, which has a constructor taking interface as an argument. I am having trouble instantiating such a class (it throws java.lang.IllegalArgumentException: wrong ... |
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Yesterday I saw a code I have something to ask,hope to help me ,thank you! The code is as follows: class Game{ Game(int i){ System.out.println("Game constructor"); } } class BoardGame extends Game{ BoardGame(int i){ supper(i); //what does super mean,how to use it,if we can not write it here. System.out.println("BoardGame constructor"); } } public class Chess extends BoardGame{ Chess(){ super(11);//the argument'11'here which ... |
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I am new to this forum and I am desperate I am going batty with what must be a simple problem. I have a Company class and an Employee class. I also have a Project class that contains main() and instantiates the constructors of Company and Employee. From Project I can successfully get and set values of the private variables of ... |
Hi miguel, thank you for your reply, but i am just trying to create a class called Student, with 1 constructor and two methods to return the name and course. i dont know how to create a new student object and get the arguments from the JOptionPane.showInputDialog passed to the student class then retrive them and print them out in the ... |
I am surprised you are not getting the input returned. Suggest you take off the original initialisations, which are unnecessary. ChangeString textOne = new String(); long numOne = 0; String textTwo = new String();toString textOne; long numOne; String textTwo;I presume you have all that lot in the same method? I have tried out what you are describing, and entering Campbell 93847593479 ... |
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I need to write a rectangle class using a no argument constructor. What I have come up with that doesn't work....I am so lost right now... is: public class Rectangle { private int height=10; private int width=25; public Rectangle() { Rectangle rect = new Rectangle(); getHeight(){ return (height); } getWidth(){ return (width); } } public void print(){ System.out.println(height+width); I need to ... |
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"class" is the name of the keyword used to define a class. "java.lang.Class" (or "Class" for short) is the name of the class that represents a class. Simply replace "class" with "Class" in your constructor, in the definition of "classOfItem" and the getter (which you must not call "getClass()", because that's a final method in Object and you can't override it). ... |
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as the subject states, i was wondering how to write a constructor which can take in a varying number of arguments for example public class average { public int average; public average( // Varying numbers of args could be any amount) { public string total = totalargs.length(); // Not a real method but hopefully you get the idea. average = (args1 ... |