I have problems with private static void print section, something is missing? And in case 4, I want it to stop the program(end the loop) but it keeps going.
import java.util.Scanner; import java.util.ArrayList; public class Dogregister16 { public static ArrayList<Dog> dogregister = new ArrayList(); private static Scanner keyboard = new Scanner(System.in); public static void main(String[] args) { initiate();
[Code] ....
case 4: System.exit(0); System.out.println("Exit program"); } } } }
I've never had to do a void method call. I have my void method in one class and my main (where I want to do the call) in another. How do you actually call a void method?
I'm pretty new to Java. I was working the project about gamble. I'm having trouble with invoking the void method from another class. This is what I have done so far.
There are two classes, and I'm trying to invoke gambleAnotherRound method from gambler class into highlighted part in casino class. So, what I want to do is when the program generates "else" part, it goes back into another gamble round.
public class gambler { public void gambleAnotherRound(double dollarsBet) { dollarsSpent += dollarsBet; Random randomNumbers = new Random(); double randomDouble = randomNumbers.nextDouble();
[Code] ....
Below one is casino class.
// use a System.out.print statement to ask how much money each gambler should bet. // Then declare a variable dollarsBet of type double, and set its value to the keyboard's // keystroke (be sure to use keyboard.nextDouble()). // If the user enters 0, then issue a break statement, so that the while loop terminates // Else, invoke the gambleAnotherRound method of each Gambler, and pass it the variable dollarsBet
I am writing a program to take user input in order to create an array, then call a void method that will read in the numbers (from user's input) and fill the array.This method must use a loop to do this.(The array is to be passed to the void method as a parameter)
in theory, this should change the contents of the array, but without returning a result. Because it is a void method, the array is only passed through the method, not returned; Am I correct?How can I return the array and display it without having to change my method type?
public class Program7Array public static void main(String[] args) { // main method int howMany = Integer.parseInt(JOptionPane.showInputDialog(null, // user decides how long array is "How many numbers are there?")); double [] numbersArray = new double[howMany]; // creating the array makeArray(numbersArray, howMany); // calling the array
I know void means it doesn't return anything but to me when I think it doesn't return anything it just does equations and other things. So why can you use this? Or is Void like returning input such as a Scanner?
I am trying to make a custom texture system for a block in Minecraft, I am not too advanced with Java and am not sure how to make this work the way I want it to.
Java Code:
/** The list of the types of step blocks. */ public static final String[] blockStepTypes = new String[] {"stone", "sand", "wood", "cobble", "brick", "smoothStoneBrick", "netherBrick", "quartz"}; private Icon missing; private Icon icon1; /** * From the specified side and block metadata retrieves the blocks texture. Args: side, metadata */
[code]....
Alright, so basically I figured I could just tell the code to see if the block is made out of Stone, then to set the texture to Stone, or if it's made out of Sand, then set it to Sand.What I usually get is Eclipse telling me to "insert '!= null' check", "insert '!= null' check", and then just error out saying "Opperator != is undefined for the argument type(s) boolean null"
I have a program that I have created from scratch called Product and I also created a Tester program to test my theory. The only problem that I have is that I am getting an error with this statement System.out.printf statement. The statement needs to print out "Program [name = HP ENVY x360 TouchSmart, price = $xxxxxx". The error states that "The method printf(String, Object...) in the PrintStream is not applicable for the arguments (String, String, void).
Which tells me that it is referencing back to the class file where I have
public void applyDiscount(double percent) { percent = price - (price * percent); //establishing the discount }
The lines of code in my tester file are (partly displayed)
String formatString = "Product[name = %s, price = %.2f]"; System.out.printf(formatString, product.getName(), product.getPrice()) //user input the discount amount System.out.println("Enter discount percentage [0 - 100]: %.2f "); double discount = user_input.nextDouble(); System.out.printf(formatString, product.getName(), product.applyDiscount(discount)); //This is the line giving me an error. }
I want to have parameters that I use the "void" for, in other words it doesn't return anything.
class code { void go() { int TestStuff t = new TestStuff(); t.takeTwo(12,34) } void takeTwo (int x, int y) { int z = x + y; System.out.println("Total is:" + z); } }
import javax.swing.JOptionPane; public class Input { public static void main(String[] args) { int user; user = JOptionPane.showMessageDialog(null, "Enter Your Age""); ERROR IS HERE if(user <= 18) { JOptionPane.showMessageDialog(null, "User is legit"); } else { JOptionPane.showMessageDialog(null, "User is not legit"); } } }
I'm getting this error message :
incompatible types: void cannot be converted to int
I want to write a method which would give us a rectangle with numbers. The input is an integer which represents the length of a line in rectangle and the result type is void. The example for n=4 is:
I have coded three classes ,1 class containing the Main method. I have declared three private data fields in Staff class and two data fields in Address class. The problem is that I am assigning String type data field from the Staff and Address Class through the public set methods to String type array in a public void method in the Main class.
public static void main(String[] args){ // TODO code application logic here System.out.println("-------------------------------------------------"); System.out.println("Press 1 - 6 To Perform Any One Following Action "); System.out.println("1. Insert New Contact "); System.out.println("2. Delete Contact By Name "); System.out.println("3. Replace Info From Contact "); System.out.println("4. Search Contact By Name "); System.out.println("5. Show All Contacts "); System.out.println("6. Exit Program ");
I am making an application in java, inside static void main, i want to customize all buttons, text areas and want to put them on desired location inside application. I have tried to use setbounds but can not use it, how can i use it, or is there any other way or layout to make my application components customized layout.
So I'd like to know what all the statement, not sure if it's the correct way of calling them but I'd like to know what like all of those purple-ish colored words in eclipse actually mean.Here's what I know so far, so if you can add some stuff to it or just correct me:
public - can be accessed by different classes. private - can't be accessed by different classes. static - adds a '.' which pretty much lets you like use methods on it? Not really sure about this one. final - a final value of a variable meaning it couldn't and willn't change? super - I have no clue, maybe something that has to be executed first? Not sure. void - bassicly you don't have to use return as it doesn't return any value. this - Uh-.. I think it has something to do with the class this keyword has been entered into, not quite sure what it does though.
I assume there are alot more but I am just not sure about these common ones, what the actually do and what's their purpose?