Error Boolean Cannot Be Dereferenced
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with error code: "Boolean cannot be dereferenced" So i'm new to this and during my challenge i keep getting this error message but boolean cannot be dereferenced java i can't figure out how to fix it, or rather what i'm
Error Int Cannot Be Dereferenced
doing wrong i suppose. I thought i did it right, can anyone explain to me what i'm doing
Error Char Cannot Be Dereferenced
wrong? Thank you! ~Ryan Example.java // I have initialized a java.io.Console for you. It is in a variable named console. String question; boolean response; do { question = console.readLine("Do
Error Double Cannot Be Dereferenced
you understand do while loops? "); response = (question.equalsIgnoreCase("yes")); if (response) { console.printf("Congrats"); } } while(response); 1 Answer MOD Rob Bridges Java Web Development Treehouse Moderator 13,396 Points Rob Bridges Rob Bridges Java Web Development Treehouse Moderator 13,396 Points over 1 year ago Hey there Rian, The trouble that is getting caused is because you're trying to set up your int cannot be dereferenced compareto boolean, I think that java thinks you're trying to change the value to be the string representation of true, instead of a boolean. In reality you have all the code that you need to pass this challenge minus a few adjustments (good job). The first thing to do is take out the boolean. Also, be sure to name your string as response, otherwise the challenge won't allow you to move on to the next step, so it should look something like, and when we're checking to see if we want to break out of the loop, check to see if the response is equal to no. Other than that, good job again! String response; do { response = console.readLine("Do you understand do while loops? "); } while(response.equalsIgnoreCase("no")); Thanks I hope this helps, feel free to shout at me if it doesn't. Ryan Loveland 328 Points Ryan Loveland Ryan Loveland 328 Points >1y ago Ooohhh okay, the course just prior to the quiz was talking about booleans in the end, so when the question talked about storing the answer
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This https://teamtreehouse.com/community/help-with-error-code-boolean-cannot-be-dereferenced is from an example exercise that i was trying to learn: /** * Create an array of size n and store a copy of the contents of the * input argument * @param intArray array of elements to copy */ public IntArray11(int[] intArray) { int i = 0; String [] Array = new String[intArray.length]; for(i=0; i * The representation is exactly the one returned by the * {@code Integer.toString} method of one argument. * * @par here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads http://stackoverflow.com/questions/3482711/how-to-solve-the-problem-int-cannot-be-dereferenced with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join 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 minute: https://www.daniweb.com/programming/software-development/threads/379119/error-error-int-cannot-be-dereferenced Sign up How to solve the problem: int cannot be dereferenced up vote 1 down vote favorite 1 Here I have some value which two of them are integer and I can't call a method on them since they are not reference. cannot be How can I solve this? String srcAddr, dstAddr, protocol; int srcPort, dstPort; public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((dstAddr == null) ? 0 : dstAddr.hashCode()); result = prime * result + ((dstPort == null) ? 0 : dstPort.hashCode()); result = prime * result + ((srcAddr == null) ? 0 : srcAddr.hashCode()); result = prime * result + ((srcPort == null) ? 0 : srcPort.hashCode()); return result; } Also, I have cannot be dereferenced an equal method too, a part of it with the error is shown below ,which the same as above I can not compare int with a null. @Override public boolean equals(Object obj) { if (srcPort == null) { if (other.srcPort != null) return false; } else if (!srcPort.equals(other.srcPort)) return false; if (srcPort == null) { if (other.srcPort != null) return false; } else if (!srcPort.equals(other.srcPort)) return false; } How can I solve this error? java hashcode equals share|improve this question edited Aug 14 '10 at 9:49 Rob 30.6k1683111 asked Aug 14 '10 at 9:14 Red Lion 1082718 add a comment| 7 Answers 7 active oldest votes up vote 2 down vote accepted For the hashcode method, you can just leave the ints as they are. Ints are their own hascodes. For the equals method, just compare them using =. So the code becomes: public class Connection { String srcAddr, dstAddr, protocol; int srcPort, dstPort; @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((dstAddr == null) ? 0 : dstAddr.hashCode()); result = prime * result + dstPort; result = prime * result + ((protocol == null) ? 0 : protocol.hashCode()); result = prime * result + ((srcAddr == null) ? 0 : srcAddr.hashCode()); result = prime * result + srcPort; return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) re 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 it means? Many thanks. /** * @(#)PrizeCollection.java * * PrizeCollection application * * @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 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 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 void searchDescription(String Description[], S