Int Cannot Be Dereferenced Java Error
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Int Cannot Be Dereferenced Meaning
Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million int cannot be dereferenced compareto programmers, just like you, helping each other. Join them; it only takes a minute: Sign up “int cannot be dereferenced” in Java up vote 9 down vote favorite 2 I'm fairly new to Java and I'm
Int Cannot Be Dereferenced Length
using BlueJ. I keep getting this "Int cannot be dereferenced" error when trying to compile and I'm not sure what the problem is. The error is specifically happening in my if statement at the bottom, where it says "equals" is an error and "int cannot be dereferenced." Hope to get some assistance as I have no idea what to do. Thank you in advance! public class Catalog { private Item[] list; private int int cannot be dereferenced equals java size; // Construct an empty catalog with the specified capacity. public Catalog(int max) { list = new Item[max]; size = 0; } // Insert a new item into the catalog. // Throw a CatalogFull exception if the catalog is full. public void insert(Item obj) throws CatalogFull { if (list.length == size) { throw new CatalogFull(); } list[size] = obj; ++size; } // Search the catalog for the item whose item number // is the parameter id. Return the matching object // if the search succeeds. Throw an ItemNotFound // exception if the search fails. public Item find(int id) throws ItemNotFound { for (int pos = 0; pos < size; ++pos){ if (id.equals(list[pos].getItemNumber())){ //Getting error on "equals" return list[pos]; } else { throw new ItemNotFound(); } } } } java int bluej share|improve this question edited Jul 19 at 0:13 Sotirios Delimanolis 155k25248363 asked Oct 1 '13 at 6:08 BBladem83 183129 2 You're trying to using a int where an Integer, Number or Object is expected...int does not have any methods –MadProgrammer Oct 1 '13 at 6:09 add a comment| 5 Answers 5 active oldest votes up vote 9 down vote accepted id is of primitive type int and not an Object. You cannot call methods on a primitive as you are doing here : id.equals Try rep
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Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, int cannot be dereferenced hashcode helping each other. Join them; it only takes a minute: Sign up New to Java and have the error “int cannot be dereferenced” up vote 5 down vote favorite I'm new to java and I've been working on http://stackoverflow.com/questions/19109131/int-cannot-be-dereferenced-in-java this exercise for a while, but keep receiving the error: int cannot be dereferenced. I saw couple of similar questions but still cannot figure out my own case. Here is the complete codes: package inclass; class OneInt { int n; OneInt(int n) { this.n = n; } @Override public boolean equals(Object that) { if (that instanceof OneInt) { OneInt thatInt = (OneInt) that; return n.equals(thatInt.n); // error happens here } else { return false; } } http://stackoverflow.com/questions/15857377/new-to-java-and-have-the-error-int-cannot-be-dereferenced public static void main(String[] args) { Object c = new OneInt(9); Object c2 = new OneInt(9); System.out.println(c.equals(c2)); System.out.println(c.equals("doesn't work")); } } Thank you very much for helping me with this little trouble. java share|improve this question edited Apr 7 '13 at 0:08 paulsm4 57.5k67192 asked Apr 7 '13 at 0:04 Tian 3313 add a comment| 2 Answers 2 active oldest votes up vote 7 down vote accepted equals is a method of a class. int is a primitive, not a class. Simply use == instead: return n == thatInt.n; share|improve this answer answered Apr 7 '13 at 0:06 Dukeling 36.4k94080 add a comment| up vote 4 down vote To compare ints, just use the == operator: if (n == thatInt.n) Note that int is not a class, so you can never use the . operator with an int variable. share|improve this answer answered Apr 7 '13 at 0:06 Code-Apprentice 27.6k353121 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged java or ask your own question. asked 3 years ago viewed
need some help in my programme. I have an error message: "error: int cannot be dereferenced" at line 134. Could you help me solve this problem, as I do not know what https://www.daniweb.com/programming/software-development/threads/379119/error-error-int-cannot-be-dereferenced it means? Many thanks. /** * @(#)PrizeCollection.java * * PrizeCollection application * https://answers.yahoo.com/question/?qid=20091011150107AAUdY4U * @author * @version 1.00 2011/8/25 */ import javax.swing.JOptionPane; import java.lang.*; import java.util.*; public class PrizeCollection { public static void main (String[]args) { // Declare variables and arrays which will be used in the programme String[] Description = new String [3]; String[] Color = new String [3]; int[] Value = new cannot be int [3]; //Call the Menu optionMenu(Description,Color,Value); } //Method for the menu that will appear each time a task is completed public static void optionMenu(String Description[], String Color[], int Value[]) { int option = 0; while (option!=1 || option!=2 || option!=3 || option!=4){ option = Integer.parseInt(JOptionPane.showInputDialog("Please choose an option: \n" + "1 - Enter the details of a prize \n" + "2 - Print the int cannot be details stored for all prizes \n" + "3 - Search for a prize with a particular value or by description \n" + "4 - Quit")); if (option==1) enterDetails(Description,Color,Value); if (option==2) printDetails(Description,Color,Value); if (option==3) searchDetails(Description,Color,Value); if (option==4) System.exit(0);} System.exit(0); } //Method to enter details for each prize public static void enterDetails(String Description[], String Color[], int Value[]){ for (int i=0; i<3; i++){ Description [i] = JOptionPane.showInputDialog (null, "Please enter the description of the prize: "); Color [i] = JOptionPane.showInputDialog (null, "Please enter the color of the prize: "); Value[i] = Integer.parseInt(JOptionPane.showInputDialog(null, "Please enter the value of the prize: ")); } optionMenu(Description,Color,Value); } // Method to search prizes public static void searchDetails(String Description[], String Color[], int Value[]) { // A Menu if needed to choose between search by description or by value int choice = 0; while (choice!=1 || choice!=2 || choice!=3){ choice = Integer.parseInt(JOptionPane.showInputDialog("Please choose an option: \n" + "1 - Search prize by description \n" + "2 - Search prize by value \n" + "3 - Return to the previous menu")); if (choice==1) searchDescription(Description,Color,Value); if (choice==2) searchValue(Description,Color,Value); if (choice==3) optionMenu(Description,Color,Value);} System.exit(0); } //Method to search by description public static
Help Suggestions Send Feedback Answers Home All Categories Arts & Humanities Beauty & Style Business & Finance Cars & Transportation Computers & Internet Consumer Electronics Dining Out Education & Reference Entertainment & Music Environment Family & Relationships Food & Drink Games & Recreation Health Home & Garden Local Businesses News & Events Pets Politics & Government Pregnancy & Parenting Science & Mathematics Social Science Society & Culture Sports Travel Yahoo Products International Argentina Australia Brazil Canada France Germany India Indonesia Italy Malaysia Mexico New Zealand Philippines Quebec Singapore Taiwan Hong Kong Spain Thailand UK & Ireland Vietnam Espanol About About Answers Community Guidelines Leaderboard Knowledge Partners Points & Levels Blog Safety Tips Computers & Internet Programming & Design Next "int cannot be dereferenced" when int.toString() is performed.? Here's a snippet of code that would be where my integer conversion problem occurs: int dotNumber = 2; lastName = lastName.concat(".1"); while (lastNames.contains(lastName)){ lastName = lastName.substring(0, length); String dotNumberString = dotNumber.toString(); lastName =... show more Here's a snippet of code that would be where my integer conversion problem occurs: int dotNumber = 2; lastName = lastName.concat(".1"); while (lastNames.contains(lastName)){ lastName = lastName.substring(0, length); String dotNumberString = dotNumber.toString(); lastName = lastName.concat(dotNumberString); dotNumber++; } The error message reads: "int cannot be dereferenced", pointing towards the "toString()" operation. It appears on the API that "toString()" is a valid operation for integer, so I'm not really sure what the issue is. Does anyone know what I'm missing? Update: Edit: Sorry, forgot to indicate that this is for Java! Follow 2 answers 2 Report Abus