How can i send a files which stored in array to other class?
I have tried this code but isnt working.
public class abc {
....
String ...
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public static void main(String[] args){
Employee [] employeeList =
{
// build your list here
};
}
how exactly do I build my ... |
I would like to implement a template which contains an array of the template Type. Is there a way to do something similar to what I have outlined in my sample ... |
I'm pretty new to Java and not from a programming background. I am doing a course and am stuck on a piece I hope this is appropriate to ask a ... |
Is it possible to catch a method in the current class the try-catch block is running on? for example:
public static void arrayOutOfBoundsException(){
System.out.println("Array out ...
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I am to the point where I feel as if I correctly wrote the code for this homework assignment. We were given a skeleton and 2 classes that we had to ... |
I need help dealing with an array in my java program. in my first class, "test", I set 4 variables and then send them to my other class (test2).
arr[i] = ... |
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In Java, array is a class and extends Object. I am curious to know about this special array class. I don't find the class definition anywhere. Doing a getClass().getName() gives strange ... |
I'm writing a template class which should take an array as its type.
public class Foo<T> {...}
How best can I enforce that "T" is an array type? (int[], Bar[], ...) Preferably compile ... |
I am trying to create a simple regex kind of thing for my own use where a character in a string can either be an exact match or one in among ... |
I recently had a homework question where we were supposed to work with a chess board, and place a number of queens on the board.
The question was trivial in terms ... |
If I have an instance of Class, is there a way of obtaining a Class instance for its array type? What I'm essentially asking for is the equivalent of a method ... |
In Python, you can add list subscripts to be accessors to data structures for custom classes:
class customFile:
...
def __getitem__(self,x):
return self.list[x]
to get the behavior of:
newFile = customFile()
newFile.list[1] = 4
newFile.list[1]
# ...
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Why can I do:
public class ThisTest {
int[] anArray = new int[10];
...
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I want to create an array of a type which I create.
Here's my problem:
public class MyFile
{
int ...
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I have an Array that is in a class called MusicArray
and I want to be able to print its data and search it in my SearchClass class
import java.util.Arrays;
import java.util.Scanner;
public class ...
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I have I problem.
In a method I receive a general Object as parameter and I have to retrieve the name of the class
public void myMethod(Object o)
String className = o.getClass().getName();
...
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This seems to be a common question on here but for all the ones I read, they seem to deal with different things.
I'm writing a program with a main class that ... |
Let's say I have:
public class A {
public A() {
...
}
...
public class B {
public B() {
...
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SEE THE EDIT HALFWAY DOWN THE POST.
I'm new to java and all the formal declarations of inheritance are getting me a little confused.
I have a interface like so:
public interface A{
...
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So i have the following code:
and in my text file it says:
6
5
6
8
6
2
4
I'm able to read the file from my code below, but I want ... |
I have a compilation problem in a Java program:
class FigureEditor {
int[] a; ----- Syntax error on ...
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I want to pass the array from the class LoadInventory to the main class. How do I do it?
Here is a loadInventory class where the item is read from a file ... |
In all the other cases I could find, it was due to code not in a method or incorrect bracketing, however I have checked all these. My code is this;
import java.util.*; ...
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P: 5 Jimmysevens Hi there, I'm new to java and would appreciate help with this. My project involves me creating 5 classes; Person, Employee, Demonstrator, Payroll and Test. Employee and demonstrator ... |
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red moon hi! i'm taking my first java course. and i'm stuck in this one question. i've tried soo many ways but i still dont know how to do.. Question: 1. ... |
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I remember in C#, you can do something (can't remember exactly) that will make your own class act just like it's an Array - you could forexample make a Book class and then a static class called Books and then just say Books[3] to access the fourth Book in Books. Is there a way to do that in Java? |
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I have found a list of the letters in a book (Lemay and Cadenhead, teach yourself Java2 in 21 days, SAMS, 2/e, page 479). B byte C char D double F float I int J long L object S short Z boolean As you have seen from the link I gave earlier, there is an associated [ and [L is followed ... |
Not sure exactly what your problem is. Are you trying to put the contents of the int array into an Integer array? If so, each element of the int array will need to be put into an Integer. int[] a = {1,2,3,4}; Integer[] b = new Integer[a.length]; for (int i = 0; i < a.length; i++) { b[i] = new Integer(a[i]); ... |
Hi all I am having a little problem. I have a class called Student in that class there is a variable: public final static char[] GRADES = {'A', 'B', 'C', 'D', 'F'}; I have another class called GradePoint Inside of that class I have a method: public boolean validateGrades(char tempGrade)throws Exception { boolean valid = false; for(int i = 0; i ... |
I have a line of code within a method called storeStudent in a class called storage. students [hash] = Student.upperCase(name); The error message I am getting is: C:\java>javac StorageTest.java StorageTest.java:130: incompatible types found : java.lang.String required: Student students [hash] = Student.upperCase(Student.studentName); ^ The line of code in the method called storeStudent in a class called storage is: public static int storeStudent ... |
Hi, I'm new to Java, coming over from years of SAP ABAP coding. I can see that arrays have to be declared as fixed at construction time. What if I want to extend the size of the array at run time? What are generally accepted classes to use for such operations? (I assume that there are some). I would like to ... |
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I have an array in a.java, den b.java is suppose to collect data and put inside the array in a.java. den I need c.java to read from the array to see wad b.java has entered. If i use "a ent = new a;" I would get a blank array again...so how do i read from c.java to see what b.java has ... |
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I'm trying to create a method 'GetPlayers' that returns an array of Class 'Player' inside the Class itself - Good idea or bad idea? If good, how would I use the method to create an instance of the array? e.g. Player players = new Player.GetPlayers(); (yes it's still early days for me :rolleyes Many thanks Paul. public class Player { private ... |
: //abstract class: public abstract class Account { private int acctNumber; private int accBalance; public Account () { accBalance = 0; } public Account (int acctNumber, int accBalance) { setAcctNumber(acctNumber); setAccBalance(accBalance); } public int getAcctNumber () { return acctNumber; } public void setAcctNumber (int acctNumber) { if (acctNumber > 0 ) { this.acctNumber = acctNumber; } } public int getAccBalance () ... |
If I have a method that takes an Object and the object can be an array (say Integer[][]), how would I find out that the base class is Integer? Doing a getClass() returns the Integer[][] class not Integer class. So I can't just use ".equals()" to see or even instanceof. how do I find the array's base class? For example: public ... |
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i was converting some C++ code to Java and was wondering how i get all of the methods to 'see' the global array? my solution i came up was to wrap all of the methods in an inner class, but before i go ahead and implement it i wanted to know if that would work? as the array gets passed around, ... |
Hello, I'm new to JAVA and I'm trying to pass an array from one class to another, but I can't get it right. I've been able to get individual values on at a time. If any one can help me out and give me a quick sample of how to do it, I've done this below. Is it as simple as ... |
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Hello all. I am having a problem running my program. It produces no output and goes on infinitely. I can't figure out what the problem is. Any help spotting anything unusual with my code would be appreciated. Thanks. public class LetterInventory { public static void main(String[] args) { LetterInventory inventory1 = new LetterInventory("Brandon Peeples"); } private String data; int[] inventory = ... |
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Thanks. I think I'll be using the utility class way more often than the reflection class - which looks a little hairy to deal with. One more question about Arrays Class. Look at this method: static int binarySearch(Object[] a, Object key) Searches the specified array for the specified object using the binary search algorithm. Is this method taking an array full ... |
Hi, I'm just trying to understand how to use this method. I keep getting "cannot find symbol" for fcseats = Arrays.copyofRange(schart,0,4) when I compile, why am I getting this error? I verified parameters in the API. import java.util.Arrays; /** *Exercise 7.19 in Java book */ public class Reservation { //original seating chart with both sets of seats combined private boolean [] ... |
Nothing you put there is going to be right. The right-hand side of the expression produces a Waypoint. Just a Waypoint. It doesn't produce an array of Waypoints, so you can't assign it to an array of Waypoints. So that doesn't make sense. I'm guessing that, since you have a loop, your goal is to assign that Waypoint object to some ... |
I have 2 arrays in different classes. Cards[100] is in CardArray.java and has 47 elements Map[501] is in MapArray.java and has 3 elements I've been reading a lot about trying to avoid using getters and setters. I want to edit either array while in the opposite class, but how do I do this? For example, when I'm in the CardArray class, ... |
I have been tryng to draw two objects from the same class on a JFrame for about 5 hours now:confused:, but the last object created overrides the others. For example I want to paint two objects from the class ball on one JFrame. I need to do this in an array, I have tried this with arrayLists and normal arrays from ... |
Hi! I have a program that should does what in the main.java. My problem is that I have to store every new "munkas" in an array. How should I do that? Java Code: import szuret.*; class Tester { public static void main(String[] args) { SzoloSzureteloMunkas munkas1 = new SzoloSzureteloMunkas("Bla",5000,100,0.7); SzoloSzureteloMunkas munkas2 = new SzoloSzureteloMunkas("Jnos",6000,120,0.6); System.out.println(munkas1.osszehasonlit(munkas2)); // helyes: Bela System.out.println(munkas2.getNev() + " ... |
Help displaying an array from a seperate class Okay, What I'm trying to do is take data from an array in my main class, and display it in a different class. here is my main class: Java Code: public class CharCreate { public static void main(String args[])throws Exception { int AddSkillPoints = 5; int[] dials = new int[5]; dials[0] ... |
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Certainly, but be warned, they are kinda long: BattleShip.java Java Code: /** * */ import java.util.*; public class BattleShip { public static void main(String[] args){ Scanner input = new Scanner(System.in); System.out.println("Welcome to battleship\n\n"); char[][] ArrayPlayer= new char[10][10]; // Create an Array for the player Arrays MyPlayers = new Arrays(ArrayPlayer); // Set MyPlayers object to contain array ArrayPlayer, called from Arrays.java //Patrol ... |
public class TestFloorProgram { public void start() { System.out.println("Testing the Floor class"); System.out.println("\nExpected output:\n---------------"); System.out.println(" | Floor 0 | (A,1)(B,2)(C,3)(D,4)"); System.out.println(" | Floor 0 | (A,1)(C,3)(D,4)"); System.out.println(" | Floor 0 | (C,3)(D,4)"); System.out.println(" | Floor 0 | (C,3)"); System.out.println(" | Floor 0 |"); System.out.println("\nActual output:\n--------------"); Floor f1; f1 = new Floor(0); Person p1, p2, p3, p4; p1 = new Person("A", 1); ... |
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public class CollegeCourse { private String courseId; private int creditHours; private char grade; public CollegeCourse(String i, int h, char g) { this.courseId = i; this.creditHours = h; this.grade = g; } public String courseId(){return this.courseId;} public int creditHours(){return this.creditHours;} public char grade(){return this.grade;} public void setcourseId(String i){this.courseId = i;} public void setcreditHours(int h){this.creditHours = h;} public void setgrade(char g){this.grade = g;} ... |
Hi burrish, in main you can place the following code Input3 input = new Input3(); String [] arrayFromClass = input.getNextString(); for(String s:arrayFromClass){ System.out.println(s); } ############# you can modify the getNextString method to return an array of strings instead each string once. public String [] getNextString() { return input; } .. I hope this is what you are looking hope this will ... |
Ok so I have these two classes: Book and Encyclopedia. I want to create a method in Encyclopedia. I want it to modify an array which is an object in Book class. I'm not allowed to take the array as a method input like this: public void MethodName(Book [] a, String ...){ Instead, I have to find a way to call ... |
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private void calcPrintCost(){ //==todo==increment number of prints processed ++totalPrintsProcessed; //==todo==calculate printing cost here printCost = owner.getNbrPrints() * owner.getNbrRolls() * printRate; } {code} Problem is, in the printCost equation (printCost = owner.getNbrPrints(), etc) I am suppose to multiply the number of exposures (which can be certain numbers within the array) For example the user will select a film type and from there ... |
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I have a project due soon. The project involes a hair solon with a set of Services, Prices, and Avg. Time spent with each service. I not even sure where to start. I have get and set methods for each date field. I know I need to build an constructor with arguments passing through them and store the data as arrays. ... |
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Hi everyone, I'm having a little trouble doing something and I wonder if someone could help. I have two different classes. One call Line which is an int Array of 6. and the other class called StoreLine which is an array of Lines objects. The problems is that the integers stored on a line is read from a ASCII file, using ... |
I am reading my text book and I have a question: suppose Date is a class then: Date[] holidayList = new Date[20]; The book says this creates 20 indexed variables of type, this does not create 20 objects of type Date. Can someone clear this up for me? I am thinking that you would have an array of 19 Date classes. ... |
public static String nextDay(int index) { index+=1; return dayStrings[index]; } } The above compile well with no issue. Here is the problem which i need to seek your help, I had created a program to test the above program. But I am not sure how to test it. Here is what I had written : public class TestWD { public static ... |
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oCreate an object eg if num = 0 this will create an object in the first cell of the array: inv [num] = new Invoice(); oUse the dialog boxes and setters to capture the data as before but include the invoice number ie 1 to 3 as shown below in the dialog box. eg inv[num].setPartNumber(partNo); ?Print the Invoice heading as before ... |
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Hello there. Right, i have 3 classes with which i am having a bit of trouble with. The first class, "Drawing," creates an array called componentList. Then, in another class called "DrawingCanvas" i have an instance of "Drawing" created. In this second class i have two methods which need to use the array from the first class. These methods are called ... |
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pvujic wrote: I know what is wrong, but I don't know how to fix it. Any solutions? I don't know what you're ultimately trying to accomplish with that line of code. You have some code that says "I'm going to put an array of Strings here", and then you have some code that says "Here's a Produkt to be used where ... |
I have two classes - class A and class B - class B extends class A In class A I have class level variables declared as public static int d_jake = 0; public static String array_test[] = new String[50]; I had done some operations on them and changed their values I mean d_jake has some other value and array_test is filled ... |
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Yes I meant a String array which contains the names of the 9 classes. I want to execute the method tArray[m].menu depending on the value of m. I may not have the syntax correct but what is needed is to execute the main method in one of 9 classes depending on an index m. Thank you |
Hello, i am very confused as to how to make an array inside a class and use it from another class. For example, when making a "Book of hotties" where i would create entries in a book(objects) of hot women ,with parameters name, last name, phone number, and rating, and i am supposed to make a class for the book itself ... |
I'm trying to make an array of objects of a class I've written called Order. I declare the array like this Order[] order = 99; As I understand it, this should make an array with 99 elements, each of type Order but I get the following error incompatible types found : int required : resturanttest.Order[] I am using NetBeans 6.5 IDE. ... |
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You dont need to use arrays for the class. Think about it , A Person has a name and a code. So one String and one int should be enough to represent a person ,hence your Person class will need just those 2 variables . ( String name , int code ) Now write a public method that will take in ... |
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Sorry for the typos, didn't notice. - read a the line - split it into a String array as shown - if you get three items: - grab the first, trim it and use it as the first argument - grab the second, trim it, parse it using a method from Integer class, use the result as the second argument - ... |
I am not going to post any code this time, just see if i can get any suggestions. I have no problem in passing objects from a class into a method within that class but now i have a new problem. I have a database class which ask the user for inputs which are stored in an array. I have then ... |
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Hi, Here I am again with more questions. I am grovelling for help. I am working on a program in Netbeans 5.5.1 where I created a class called Student that gets and sets Last Name, First Name and Student ID. Now the program to run as a samle of this class will store the first Student I get and put it ... |
Hi, I couldn't find the syntax for doing this. I just want to instantiate an array of inner classes (non-static). It says '(' expected. Here is a small sample: public class test_inner { public class inner1 { } public inner1 inner1_inst; public class inner2 { } public inner2[] inner2_ar; public static void foo() { test_inner inst = new test_inner(); // OK ... |
Reason: The application programmer doesnt need to know the real model structure Id like to change MyModel.java later on when there will be new needs, but dont change the API I am looking for a kiss solution (keep it simple and stupid), so no academic thing like e.g. a factory pattern. Is there a (general) simple solution I was too blind ... |
as you might have noticed for the last part (plz look at the code right at the end of the score class). after it says /** * Create and show the GUI. */ " i tried to return the array names players but that did not happen. what i had before i had the array trouble was :::: this part ... |
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