public class Start {
public Register theReg = new Register();
public static Start go = new Start();
public static void main(String[] args) ...
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The following code obviously doesn't work because List<E> is abstract:
public class MyList {
private List<E> list;
public MyList() {
...
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In JavaScript I can build an Array of string values like:
var stuff = new Array('foo','bar','baz','boz','gaz','goz');
or even easier
var stuff = 'foo,bar,baz,boz,gaz,goz'.split(',');
In Java it seems overly verbose and complex... is there an easier ... |
In Java is there anyway to have one constructor that will accept an array or a collection? I have been fiddling with this for a while but I don't think ... |
It is very common to initialize list by array of objects in such way:
Foo[] objs = ...;
ArrayList<Foo> list = new ArrayList<Foo>(Arrays.asList(objs));
I wonder, is there any reason why desiners of ArrayList didn't ... |
Sorry for the silly question, but I cannot seem to find an answer on google. I have written a class, and within the class there is a constructor which creates an ... |
I have been trying to do the following:
class foo{//something}
class foo1 extends foo{
foo_func1(){//something
}
foo_func2(){//something
}
};
class foo2 extends foo{
...
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I am trying to extend wordRecord class by Record, record will be used to write randomly to disk. I am having problems with using arrayLists. Can you please tell me what Im doing wrong. How do I declare an arrayList and initilise it in a constructor Method. My code is below Record class // Record class for the RandomAccessFile programs. import ... |
Hello all I think one of my course mates has asked a couple of questions in the last week so the code objective may seem a bit familiar! I am trying to read in data from a text file (which I have done) store it as a variable and then add it to an array. I seem to be very out ... |
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if i write a program like bellow it gives compile time error that packege listA doesnot exist import java.util.*; public class Strtok { List listA = new ArrayList(); listA.add(new Integer(9)); } if we write like bellow then it dont give anyy error it compiles and run import java.util.*; public class Strtok { public void kcp(){ List listA = new ArrayList(); listA.add(new ... |
private int buildingAccount; private String address; private String description; private double tetragonikaMetra; private String oikodomikoTetragono; private String orofos; private ArrayList propertyHistory = new ArrayList(); private ArrayList property = new ArrayList(); private ArrayList percentage = new ArrayList(); /** * The constructor with no parametres that initializes to the default the variables: */ public BuildingRecord() { this(0,"","",0.0,"",""); } |
Hello Everyone! I am trying to figure out if there is a way to add a newly created object to an ArrayList in a constructor. It seems that I cannot get it to work the way I would like because really the object is not yet created when it is trying to do it. Is it ever possible and if so ... |
Thank you for responding =) public abstract class Item{ private String title; private int qty; private double price; //Recommend other stuffs private ArrayList recommendations; public Item(String title, double price, int qty) { this.title = title; this.price = price; this.qty = qty; this.Recommendations = new ArrayList(); } } public class Wallet extends item{ private String material; public Wallet(String title, double price, int ... |
How can I get data from user input to store it in Array and creating new constructor and so that the array should be dynamic? Java Code: //Tiusta seda, et kysib input scanneriga 5 inimest-> //loob constructorid-> //->tleb, kui miinimumpalk on //sorteerib nimekirja palga suuruse j2rgi //Catchib errorid //salvesta faili import java.util.*; public class Workplace { public static void main(String[] args) ... |
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/** The Hotel will have an addRoom method that will create each room with the required information: room number, bed type, smoking/non-smoking, and the room rate. Create at least 5 rooms with different characteristics. Each room will also have a boolean field called occupied attribute that will be set to false when the room is created.**/ |
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// Create two JScrollPane objects jScroll = new JScrollPane(); jScrollRt = new JScrollPane(); // First, create the JTextArea: // Create the JTextArea and add it to the right hand JScroll textArea = new JTextArea( 200,150 ); jScrollRt.getViewport().add( textArea ); // Next, create the XMLTree XMLTree = new XMLTree(); XMLTree.getSelectionModel().setSelectionMode( TreeSelectionModel.SINGLE_TREE_SELECTION ); XMLTree.setShowsRootHandles( true ); // A more advanced version of this ... |
Yes - I know my example is simplfied. In the real code, it's reading a fairly complex tree of nested ArrayLists(s). The data is displayed correctly after reading. I did some poking around in the debugger and data looks good there, too. However, if I want to change one of the nested objects, I don't see any way to check the ... |