problem « cast « Java Data Type Q&A





1. Java Custom ListCellRenderer casting problem (SSCCE included)    stackoverflow.com

I am trying to create a custom ListCellRenderer in order to give different foreground colors in each line, depending on the input of the jList. I am not an expert or ...

2. Probably a casting problem - Java    stackoverflow.com

I wrote the following code:

public class Point2
{
    private double _radius , _alpha;    

    public Point2 ( int x , int y )
 ...

3. Problem understanding a casting issue    stackoverflow.com

Can someone explain to me how the two lines under the comment are compilable?

A a = new A();
B b = new B();
C C = new C();

// How can these work?
((G) a).methodG(a);
((B) ...

4. Casting Problem    coderanch.com

Hello, I am new to this forum and sorta new to Java programming. Here is my problem. I have a piece of Lotus script that I am basically converting to Java line by line. Probably not best practice I know. Question when I try to cast a character to an integer I get errors and I cannot find the correct way ...

5. casting problem    coderanch.com

Because it is not possible to cast Object directly to a primitive such as int or char. Prior to Java 5.0, it wasn't possible at all. Now however, you can using auto(un)boxing, just as long as you do the right casting: ch = (Character)st.pop(); How this works: 1) The object is retrieved from the pop() method. 2) It is cast to ...

6. Casting Problem *Help Please    coderanch.com

7. Problem with casting    coderanch.com

Are there different rules for casting for different types of operators(like assignment and compound operators) I mean when byte b=1; long l=1000; b=(byte)l; //compiler asks for casting here. And when byte b=1; long l=1000; b+=l; //which is b=b+l,and the result of b+l here is long,then why doesn't compiler ask for casting when assigning to long to byte as above exmaple.And will ...

8. Casting problem. Image to BufferedImage    coderanch.com

RenderedImage rendImage = myCreateImage(); // Write generated image to a file try { // Save as JPEG file = new File("newimage.jpg"); ImageIO.write(rendImage, "jpg", file); } catch (IOException e) { } // Returns a generated image. public RenderedImage myCreateImage() { int width = 384; int height = 288; // Create a buffered image in which to draw BufferedImage bufferedImage = new BufferedImage(width, ...

9. Casting problem    coderanch.com





10. Problems with Casting    coderanch.com

Hello Everyone, This question is most likely very entry level to most of you, but I'm new to programming. Please bare with me. I have an application that passes data from an Array into a Vector, a LinkedList and an ArrayList. Iam having problems display the data in the Collections. Instead of seeing the values in the collections I see what ...

11. casting problem    coderanch.com

Hello all I have the below casting problem in my servlet program for stock trading system: "java.lang.ClassCastException: trade.equity.XXXEquity cannot be cast to java.lang.Comparable" The XXXEquity is a subclass of Equity, code looks like: class Equity implements java.io.Serializable, java..util.Comparator{ public int compare(Object o1, Object o2) { int status = 0; if(o1 instanceof Equity && o2 instanceof Equity) { Equity e1 = (Equity) ...

12. Casting problem    coderanch.com

class Ab { private int x; } public class Bc extends Ab { private int z; protected Bc(int z) { this.z=z; } public static void main(String[] args) { Ab a=new Bc(4); System.out.println((Bc)a.z);/*why this line gives the compiler error of cannot find symbol?*/ Bc b=(Bc)a; System.out.println(b.z);//while this one compiles fine??please clear my doubt... } }

13. Casting problem    coderanch.com

Hi All, I am unable to understand a very simple casting conversion of classes. Please help me clear my concept.!!! Here is the code. Employee.java ------------- public class Employee { private String name; private double salary; public Employee(String n, double s){ name = n; salary = s; } public String getName() { return name; } public void setName(String name) { this.name ...

14. Cast problem    coderanch.com

Heh, that was my exact same question the first time I messed with Iterators. In a regular for loop you are allowed to modify your iterator any way you'd like but when iterating over a collection using an Iterator you must not change the structure of the collection as Henry already stated.

15. Casting Problem    coderanch.com

16. Casting Problems    coderanch.com

You can't cast to it at Compile time if I am understanding your question correctly. When using Reflection, you are essentially giving up compile-time type checking and all the conveniences that come with it in order to gain the ability to "dynamically cast" as people seem to always describe it. Read up on Reflection and examine some coding examples. Reflection is ...





17. Casting problem    java-forums.org

public class SudokuBoard { private ArrayList[][] initialBoard, board; protected final static int ROW = 9, COLUMN = 9; public final static int EMPTY = 0; public SudokuBoard() { initialBoard = new ArrayList[ROW][COLUMN]; board = new ArrayList[ROW][COLUMN]; for (int y = 0; y < board.length; y++) for (int x = 0; x < board[y].length; x++) { ArrayList cellInitial = new ArrayList(); ArrayList ...

18. Problem with my cast    java-forums.org

19. Casting problem    forums.oracle.com

Hi every body, I am getting following exception while running the following code. I checked it and casted it carefully, but I do not know why it is displaying the error double diffperc1=diff/previousPrice*100; diffperc1=Math.abs(diffperc1); if (diffperc1 >= 25){ NumberFormat formatter=new DecimalFormat("0.##"); String stringdiffperc=formatter.format(diffperc1); double diffperc=Double.parseDouble(stringdiffperc); } And the error is as java.lang.NumberFormatException: For input string: "25,89" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1207) at ...

21. Problem With Casting    forums.oracle.com

First, way too much code. In the future, please trim it down to just what it necessary to demonstrate the problem, even if that means creating a small program from scratch--an [SSCCE|http://sscce.org]. Arindam_Choudhury wrote: D:\working>javac -g list/*.java list\LockDList.java:56: cannot find symbol symbol : variable lock location: class list.DListNode node.lock = true; ^ 1 error but when i try ((LockDListNode)node).lock = true, ...

22. casting problem    forums.oracle.com

(Integer)seq[2]==0 I'm trying to use this in an if statement. The value of seq[2] is 1 but I can't figure out how to get it to work. seq is an Object[] seq[2]==0 Incompatible operand types Object and int (Integer)seq[2]==0 ClassCastException: Cannot cast "1" to java.lang.Integer (int)seq[2]==0 Cannot cast from Object to int What is the proper way to do this?

23. Casting problem    forums.oracle.com

24. Casting Problem    forums.oracle.com

25. Casting Problem    forums.oracle.com

26. casting problem    forums.oracle.com

27. Problem with Casting    forums.oracle.com

28. casting problems    forums.oracle.com

29. casting problem    forums.oracle.com

Hello, I want to cast an object into a subclass and use a method from this object. This is part of the code so you can see what i'm trying to do. Controller c = Mediator.getMediator().getController(); (c.getClass() c).method(); I know that there is a cast(Object obj) method in for Class, but I don't see how to use it here.

30. Casting problem    forums.oracle.com

Maybe I am wrong but I don't understand your code as in why did you do it this way: 1. The Bookmark class creates a JTree and adds a selection listener which is the TreeController. Why do you then have the createNodes() function in TreeController ? I think the TreeControlloer class should override valueChanged() and everything else should be in Bookmark ...