Passing A Boolean Parameter From One Method To Other
Jan 30, 2015
Java SE Runtime Environment build 1.8.0..This is part of the code:
public static int addAddress (String[] number, boolean[] front, double[] total) {
int num = 0;
double ffee = 0;
/*boolean value = false;*/
[code]...
I have tried using the line of code commented out, /*boolean value = false;*/. However, another error is displayed. The compiler shows the following...
Inspection.java:33: error: incompatible types: boolean cannot be converted to boolean[]
front[num]= defineFront(num, value);
^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output error...I know that boolean values are by default stored as false, once you create the array. However, I'm having trouble passing the variable to the method.
I'm using Java in BlueJ where I'm trying to write a class to store cycling club membership details in a map. I'm trying to pass a map as a parameter to a function that will iterate over the map and print out the member details. My code is:
public class CtcMembers { //instance variables private Map<String, Set<String>> memberMap; /** * Constructor for objects of class CtcMembers
[Code] ....
When I execute the following in the OU workspace:
CtcMembers c = new CtcMembers(); c.addCyclists();
I can see a map populated with the expected details.
When I execute the following in the OU workspace:
c.printMap(c.getMap());
I get the following error:
java.lang.ClassCastException: java.util.HashSet cannot be cast to java.lang.String in CtcMembers.printMap(CtcMembers.java:81) in (OUWorkspace:1)
I wasn't aware I was trying to cast anything so this has got me baffled.
So method invia call the method popolaScompiute, inside popolaScompiute there is an iteration through some id and for some id can occur an error; what i want is the getting the value of id in the first method invia, using the block try/catch. Is there a way to accomplish this?
I am trying to run an example in which I pass a parameter to imported file but its not working.
This is my header.jspf file which I will include in a jsp file.
<img > <br>${param.sub}
And This is the JSP file contact.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <body> <c:import url="header.jspf"> <c:param name="sub" value="We love to hear from our clients------------" /> </c:import> <br><br>
Now this is JSP page content
</body> </html>
When I hit the contact.jsp file , It does show me the image I have on header.jspf , but its not able to print the parameter that I am setting in <c:param>
So after showing image it just shows ${param.sub}. So EL is not translated properly.
combo is the private CombinationLocker object I created within the Locker class. Do I need to pass the combo object on to the CombinationLock class? For reason, I do not comprehend, the combination password from the main class is not passing through to the CombinationLock class, and the combination values are all zero.
I am trying to make a class definition file for an ASCII File.
Ultimately, I want to be able to add methods to allow the image produced by the file to be printed normally, then printed with various manipulations.
However, for some reason, whenever I try to run the program to test my normalPrint method, it terminates without printing anything.
I think this is because the array's values width and height are not within the scope of the method. I tried passing the array as a parameter for the method like so:
Java Code:
public void normalPrint(char [][] poop){ //method here } mh_sh_highlight_all('java');
But it gave me an error that stated
"The method normalPrint(char[][]) in the type asciiFile is not applicable for the arguments ()"
Class Definition:
Java Code:
import java.io.*; import java.util.Scanner; public class asciiFile { int height; int width;
I read in a book that when you change the value of a method parameter that's a boolean or other basic datatype within the method it only is changed within the method and remains the same outside. I want to know if there is some way for me to actually change it within the method. For example:
public class Change { void convert(boolean x, boolean y, boolean z) { //i want to set x,y, and z to false in this x = false; y = false; z = false;
[code]...
I want to put in part1, part2, and part3 when i call the method than i want them to be set to false within the method. The specific reason i asked this question was because im trying to code a battleship and i have a subroutine class with a method that when its called it checks if a ship has been sunk. If the there was a sink than the method will set a ton of boolean variables to false.
Just to clarify, I want something like this:
void convert(thing1,thing2,thing3,thing4) { //some code here that sets thing1,thing2,thing3, and thing4 to false } // than in main: boolean test1 = true; boolean test2 = true;
TextButton up = new TextButton("up", textButtonStyle);
and .addListener is just one of the methods "TextButton" has (actually I think its inherited from "Button" but that doesn't matter).
Basically my question is what's going on inside the parentheses? From what I see its a new instance of "ClickListener" but then suddenly they override an actual method within. Is this simply just a way to override a method from the ClickListener class or is it something else?
I am working on a program that simulates someone logging in. For this program, I have three methods:
public void input(String text) public void click(String button) public boolean loggedIn()
Naturally, the default status of loggedIn() is false, but I am having trouble changing the boolean to true when a user has successfully entered a username and password.
Specifically,
public void click(String button) { Button = button;//Button is declared at the beginning of the class if(Button == "Submit") { //Statement that changes loggedIn() from false to true when the user clicks the "Submit" button. }
No matter what I try, I get various errors about how what I tried was illegal.
I've been trying to program a software for minimizing (sum of products and products of sum) a boolean algebra using Quine mccluskey method... I've created the GUI and I got stuck in the process... I need a code for minimizing a 10 variable function ....
So, this is weird for me because I don't really understand why the BorderLayout class constructor is being initialized as a parameter for the setLayout..
Now, i have an array of Client, so I would like to enter within this. Example:
public void addClient(Client c){ for (int i = 0; i<client.length ; i++) { // client is an array of Client object client[i] = c; // Enter a c in the array, but does not work! System.out.println("test "+clienti[i]); // print Client@15db9743 } }
I have used the println for check if worked insertion, but the result shows no
public static void doSomething(List<? extends GenericClass> input) { // op }
^
This compiles and works, ensuring I can only pass in a List of a type extending GenericClass.But now I want it to accept an Array instead of List. This is where I'm stuck:
public static void doSomething(<? extends GenericClass>[] input) { // op }
^
A wrong guess at the syntax which does not compile. One solution is to convert Array into ArrayList before calling the 1st method above, but I'd rather bypass this if possible.
I have a drop-down which contains the four sections simple buttons(filters). When click any of these buttons some settings are applied. I have successfully auotmated it using simple if else and switch but in that case i have to use 8 parameters(8 are the number of button)
public void editFilters(WebElement filter1, WebElement filter2, WebElement filter3, WebElement filter4,WebElement filter5,WebElement filter6,WebElement filter7,WebElement filter8 String edit, String expectedColour) { switch (edit) { case "selectFilter": if (filter1 != null) {
[Code] .....
But want to make it more effective by using hashes. I do not want to use 8 different parameters to perform action on the respective button.
So now what i want to implement.
Create a method in which i pass the parameter1 as hash and 2nd parameter as 0 or 1, 0 means unSelectFilter and 1 means select the filter.
With parameter 1, in code i want to pass the name or xpath or anything else for any number of filters , that those filters names should be stored into that hash and then by passing 0 or 1, i can select/unselect those filters.
This program contains a superclass and a subclass that will gather the following information from the user:
name, address, phone number, and customer number.
Everything works fine except that I have to create a boolean method in this program that is required to determine based on user input whether they want to be added to a mailing list.
I cannot get this method to work with main, each time it is called it will always return the value but main will constantly read the last statement (else, where it will read "not wanting to be added to the mailing list).
The only way I can get this part of the program to work is by adding an equals method in main that ignores the case, but I am required to write a boolean method so this is not allowed.
Superclass:
public class Person { private String name; private String address; private String phoneNum; public Person(String pName, String add, String number) { name = pName; address = add;
public Polygon polygonFrom(Point[] corners) { // method body goes here }
So from what I understand this is a constructor method for a Polygon object from the Polygon class. What I dont get is the name of the method polygonFrom()
Shouldn't a constructor for a Polygon just have the same name as the class? Because from earlier examples in the tutorial it seems to me that this is what has been done
For example:
public Bicycle(int startCadence, int startSpeed, int startGear) { gear = startGear; cadence = startCadence; speed = startSpeed; }
I am working on an independent project it is a simple little text based rpg that will run in a counsel window. I have an object for Character that is creating during a CreateCharacter method. I want the play to be able to enter a character that will open up a menu that displays things like the name and health and stuff of the character from the object created in CreateCharacter, but because I have it in a different class I don't know how to reference the object made in CreateCharacter.
I have it in 6 files
Character --- Object with getters/setters for things like name, age, race, class, ect MainMenu --- Displays title and promts for new game and quit CreateCharacter --- Walks through and sets all values in Character Stats --- Keeps the players stats (health, attack, ect) in an array Intro --- Beginning demo thing (not really important for this question) Menu --- Displays all current user stats (Having issues with this one)
