Java Error Boolean Cannot Be Dereferenced
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Int Cannot Be Dereferenced Tostring
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Int Cannot Be Dereferenced Compareto
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 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 int cannot be dereferenced length 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 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(); } } }
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Int Cannot Be Dereferenced Equals Java
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Int Cannot Be Converted To String
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a int compareto java 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 this exercise for a while, but keep receiving the error: int http://stackoverflow.com/questions/19109131/int-cannot-be-dereferenced-in-java 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; } } public static void main(String[] args) { Object c = new OneInt(9); Object c2 = new OneInt(9); System.out.println(c.equals(c2)); http://stackoverflow.com/questions/15857377/new-to-java-and-have-the-error-int-cannot-be-dereferenced 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 9967 times active 3 years ago Blog Stack Overflow Podcast #91 - Can You Stump Nick Craver? Get the weekly newsletter! In it, you'll get: The week's top questions and answers Important community
Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Java in General int can not be dereferenced means what vivek gaur Greenhorn Posts: 21 posted 10 years ago in the below program i want to https://coderanch.com/t/379354/java/java/int-dereferenced-means convert int to String type using .toString().Can't i do like that . if not then https://coderanch.com/t/536655/java/java/int-dereferenced-error how do i do it? The entire program is ok if i print day as int , but while converting to String it says 'int cannot be dereferenced' then how do i do? import java.util.*; import java.util.*; class democal { public static void main(String[] args) { Calendar cal = new GregorianCalendar(); int day = cal.get(Calendar.DATE); int month = cal.get(Calendar.MONTH) + 1; int justmonth cannot be = cal.get(Calendar.MONTH) ; //for(int i=6;i>=1;i--) for(int i=1;i<=6;i++) { day = cal.get(Calendar.DATE) - i; System.out.println("ii: " +day); // System.out.println("ii: " +day.toString()); String ss=day.toString(); } //Calendar cal = new GregorianCalendar(); } } Keith Lynn Ranch Hand Posts: 2409 posted 10 years ago No you cannot call a method on a primitive. Just use the name of the primitive. vivek gaur Greenhorn Posts: 21 posted 10 years ago then how do i do . please advice Keith Lynn cannot be dereferenced Ranch Hand Posts: 2409 posted 10 years ago To print it out just use the name of the primitive. To convert the primitive to it's String value use String.valueOf vivek gaur Greenhorn Posts: 21 posted 10 years ago thank u man , i got it . Jeremy Tartaglia Ranch Hand Posts: 62 posted 10 years ago There are two types of data in Java: intrinsics and objects. An intrinsic is a built in data type which is a single element. Ints, Floats, Doubles, Chars, Bytes, Shorts, and Longs are all intrinsics. They have no methods or properties assoicated with them, since they are a single element. They "point" to nothing, if you want to think of it like that. An object is a class derived from java.lang.Object, which is every class written in Java. (This raises the question of what to call java.lang.Object, but let's ignore that little wrinkle. ) All Objects have certain methods and properties associated with them, like toString and hashCode. When you set a variable to an object, what you get is a pointer, more recently called a reference. (Sorry hardcore Java gurus, I'm an old ASM/C guy at heart, so they're pointers to me, not references. ) It "points" to an area in memory where the information about the class is stored. Predefined properties, abstract methods, the whole nine yards. When Java says "x ca
Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Beginning Java int cannot be dereferenced error Collete Williams Greenhorn Posts: 4 posted 5 years ago I know this error has been written numerous times, but I am still confused about why I received the error. I am very new to Java, this is my first and last programming class. This is the first time I have seen this error and lost. I know it has something to do with the int and string. I am confused all together how it works. Code is suppose to accept an integer from user, go thru the array and find the element of that array and display in a textfield. It also has to handle 2 specific exceptions. Can someone please tell me what it is suppose to look like. Thank you.. int cannot be dereferenced-line 53 //import java.lang.*; public class showElement implements ActionListener{ public void actionPerformed(ActionEvent e){ randomNumber = new int [100]; for (int x = 0; x < randomNumber.length; x++) randomNumber[x] = (int)(Math.random() * 1000); String inputString; inputString=valueField.getText(); try{ valueField.setText(randomNumber[Integer.parseInt(inputString)].toString());//error section } catch (IndexOutOfBoundsException ex){ valueField.setText("Out of bounds"); } catch (NumberFormatException ex){ valueField.setText("Not a Integer."); } } } Kurt Van Etten Ranch Hand Posts: 98 posted 5 years ago 1 Hi Collete, and welcome to the Ranch! The error you're getting, in line 17 of the code excerpt you posted, is because you're trying to call the toString() method on an int (since that's what's stored in the array), and int is a primitive type. There are several ways you could convert the int to a String: for example, you could concat it with an empty string to have it implicitly converted, or you could use the static Integer.to