Double Cannot Dereferenced Error
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Double Cannot Be Dereferenced Compareto
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join double cannot be dereferenced equals 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 double cannot be dereferenced java minute: Sign up Double cannot be dereferenced? up vote 5 down vote favorite 2 String mins = minsField.getText(); int Mins; try { Mins = Integer.parseInt(mins); } catch (NumberFormatException e) { Mins = 0; } double hours = Mins / 60; hours.setText(hoursminsfield);
Int Cannot Be Dereferenced Error In Java
The problem is that Double cannot be dereferenced. How can I fix this problem? Any help will be appriciated java double share|improve this question edited Apr 23 '12 at 2:06 paxdiablo 489k1179701419 asked Apr 23 '12 at 1:58 Daniel Donaldson 28113 What language is this? Javascript? –Mark Reed Apr 23 '12 at 2:04 Yeh man its java –Daniel Donaldson Apr 23 '12 at 2:06 12 java != javascript –David Gelhar Apr 23 '12 at 2:07 2
Char Cannot Be Dereferenced Error Java
@Daniel, I fail to see how the accepted answer relates to your question at all. You should have asked another question when you fixed the original problem. –paxdiablo Apr 23 '12 at 2:34 If you want to use hours as double, you have to leave int-arithmetic, which is used, if you mix an int with an literal int like 60: double hours = Mins / 60; Use a literal double like 60.0 instead. –user unknown Apr 23 '12 at 3:24 | show 1 more comment 3 Answers 3 active oldest votes up vote 10 down vote accepted EDIT 4/23/12 double cannot be dereferenced is the error some Java compilers give when you try to call a method on a primitive. It seems to me double has no such method would be more helpful, but what do I know. From your code, it seems you think you can copy a text representation of hours into hoursminfield by doing hours.setText(hoursminfield); This has a few errors: 1) hours is a double which is a primitive type, there are NO methods you can call on it. This is what gives you the error you asked about. 2) you don't say what type hoursminfield is, maybe you haven't even declared it yet. 3) it is unusual to set the value of a variable by having it be the argument to a method. It happens sometimes, but not usually. The lines of code that do what you
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Java Long Cannot Be Dereferenced
more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question double cannot be dereferenced intvalue 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: Sign up “double http://stackoverflow.com/questions/10273949/double-cannot-be-dereferenced Cannot be Dereferenced” toString() - does this alternative form without errors mean the same thing? up vote 0 down vote favorite In the following snippet of code the int returns properly, but when I try doing the same thing with a double NetBeans 8.0.2 complains that "double Cannot be Dereferenced" The non-commented out variables work. The commented out variables are double and do http://stackoverflow.com/questions/32741911/double-cannot-be-dereferenced-tostring-does-this-alternative-form-without not work. @Override public String toString() { return "[" + getAccountNumber() + "], " + super.toString() + ", " + owner.toString() // Error: "Double Cannot be Dereferenced" why? // + ", " + currentBalance.toString() // + ", " + interestRate.toString() ; } When I rewrite it like this NetBeans doesn't give me an error, but is this effectively the same thing for a double? @Override public String toString() { return "[" + getAccountNumber() + "], " + super.toString() + ", " + owner.toString() // Error: "Double Cannot be Dereferenced" // + ", " + currentBalance.toString() // + ", " + interestRate.toString() // The following seems to work instead: + ", " + Double.toString(currentBalance) + ", " + Double.toString(interestRate) ; } If so, great. No errors. If not, what can I do to make sure that the value of a double returns to the String just as an int would? UPDATE: From the answers I received, it looks like second approach I used works, but the following works just as well: @Override public String toString() { return "[" + getAccountNumber() + "], " + super.toString() + ", " +
This Site Careers Other all forums Forum: Java in General Java Double cannot be dereferenced Megan Hart Greenhorn Posts: 6 posted 5 years ago https://coderanch.com/t/519820/java/java/Java-Double-dereferenced Hi All, I am very new to Java and I am http://www.dreamincode.net/forums/topic/286310-double-cannot-be-dereferenced/ getting a 'Double cannot be dereferenced' error when I try to compile this code. public void actionPerformed(ActionEvent e) { Object source = e.getSource(); if (source == exitButton) System.exit(0); else if (source == calculateButton) { double sideAValue = Double.parseDouble(sideAField.getText()); double sideBValue = Double.parseDouble(sideBField.getText()); double sideCValue = cannot be Math.hypot(sideAValue, sideBValue); sideCValue.setText(Double.toString(sideCValue)); The above section of code is part of a larger program that calculates the hypotenuse of a right triangle when the user enters the two smaller sides. The error comes from this line of code: sideCValue.setText(Double.toString(sideCValue)); Could someone please help me to know how to fix this? Christophe VerrĂ© Sheriff Posts: 14691 16 cannot be dereferenced I like... posted 5 years ago Shouldn't that be sideCField.setText(Double.toString(sideCValue)); [My Blog] All roads lead to JavaRanch Christophe VerrĂ© Sheriff Posts: 14691 16 I like... posted 5 years ago And welcome to the ranch Next time you want to post some code, don't forget to UseCodeTags. This will be make it easier to read. [My Blog] All roads lead to JavaRanch Megan Hart Greenhorn Posts: 6 posted 5 years ago Yes it should be! Thanks for alerting me to that error. I will be sure to use code tags next time around! Thanks for the welcome! Post Reply Bookmark Topic Watch Topic New Topic Similar Threads creating a new JPanel from another JPanel "choice" button Double compiler error - Help! Help w/ Data Input Error Double compiler error - Help! Not being able to compile All times are in JavaRanch time: GMT-6 in summer, GMT-7 in winter Contact Us | advertise | mobile view | Powered by JForum | Copyright © 1998-2016 Paul Wheaton
12 Replies - 6204 Views - Last Post: 23 July 2012 - 05:30 AM Rate Topic: #1 BlackFiredDragon New D.I.C Head Reputation: 0 Posts: 32 Joined: 19-July 12 double cannot be dereferenced Posted 19 July 2012 - 09:10 AM I have an error with this code. It was supposed to use the binary search method in order to find the number 45.3 in this array: [-3, 10, 5, 24, 45.3, 10.5}. At first everything was OK. But then I had a problem with the decimals - because I used 'int'. So I changed a few things and made it 'double' instead of int. Now I get these errors: program-3.java:12: error: double cannot be dereferenced if (a[mid].compareTo (x)<0) ^ program-3.java:14: error: double cannot be dereferenced else if (a[mid].compareTo (x) > 0) ^ 2 errors This is my code: class Binarys { public static final int NOT_FOUND = -1; public static double binarys(double[] a, double x) { int low=0; int high = a.length - 1; int mid; while (low <= high) { mid = (low + high) / 2; if (a[mid].compareTo (x)<0) low = mid + 1; else if (a[mid].compareTo (x) > 0) high = mid - 1; else return mid; } return NOT_FOUND; } public static void main(String[] args) { double[] array = {-3, 10, 5, 24, 45.3, 10.5}; int l = array.length; int a; System.out.println("Original Numbers:"); for (a = 0; a < l; a++ ) { System.out.println(array[a]); } System.out.println("45.3 found at " + binarys(array, 45.3)); } } Please help me with this problem, it's been stuck with me for several days. Thank you! Is This A Good Question/Topic? 0 Back to top MultiQuote Quote + Reply Replies To: double cannot be dereferenced #2 macosxnerd101 Games, Graphs, and Auctions Reputation: 11994 Posts: 44,812 Joined: 27-December 08 Re: double cannot be dereferenced Posted 19 July 2012 - 09:12 AM You can't invoke methods or reference fields on primitives. Since these are numbers, just directly compare them using the >,