JTextField - Enter Some Values For Object

Mar 29, 2014

I'm working with a project there ill need to enter some values for an Object and for this i'm using JTextField. However some of the variables are of the types double, int and bool. Is there a different method of reading thees types?

for example:

double playTime = this.playTime.getText();

This won't work because playTime is of type double and .getText(); takes a String.

How will i handle this? Id rather not convert from String to Double if its possible.

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Using Jtextfield On Jframe (Swing) To Enter Search Terms In Different Class

Dec 4, 2014

I have a swing jFrame set up with a control group which contains 3 radio buttons.

When one is clicked it sends its label to a jtextfield in a different class i have code parsing text by a term

Java Code:

Scanner s = null;
try {
s = new Scanner(new BufferedReader(new FileReader("/Stage_One.txt")));
s.useDelimiter("*");
String total = (s.next());
Pattern p = Pattern.compile("[]+");

[Code] ....

I just need to know how to access the jframe variables (textfields, panels and such) so i can use their inputs in code to filter a text file.

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Mar 25, 2015

I have a supermarket checkout line where i have a list of available products on the left and then a basket on the right with the products in. The products are listed in an array, here is the product class

public class Product {
private String name;
private double weight;
private double price;

[Code] ....

with getters and setters excluded, and the list these are put into

public class productList extends DefaultListModel {
public productList (){
super();
}
public void addProduct (String name, double weight, double price, int code){
super.addElement(new Product(name, weight, price, code));

i have the price for each product to be displayed in a text field with the following code

addBasketItem = new JButton();
getContentPane().add(addBasketItem);
addBasketItem.setText("Add >");

[Code] ....

defaultCheckoutList contains my available items and defaultMainList is the basket, with mainTillPrice being the jtextfield.

This works to get the price however it just replaces each time i make a new entry with the price for the next item, i want a total of the price of all the items i have added, but not sure how.

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Jan 18, 2015

I currently building a hotel reservation system, and I'm having issues with retrieving and setting other values from a JTextField.

What I'm trying to do is to retrieve the value that was inputted into a textfield, and then setting that value to a string in another class.

In here, I'm trying to retrieve values from the JTextField:

@Override
public void actionPerformed(ActionEvent event) {
GuestInfo gi = new GuestInfo();
if (event.getSource()==roomView)
{
roomViewFrame.setVisible(true);
roomViewFrame.setSize(1000, 600);

[Code] .....

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Mar 10, 2014

I want to have JTextField automatically highlighting the current values for overwriting when the box is selected. Is there a way to do this? It seems like something that might occur in an action listener.

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May 6, 2014

Create an application that allows a user to enter values for an array of seven Salesperson objects. Offer the user the choice of displaying the objects in order by either ID number or sales value.

import java.util.*;
public class SalesPersonSort
{
public static void main(String args[]) {
int[] id = new int[7];
int[] salesValue = new int[7];
final int END = 999;

[Code] ....

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Feb 21, 2015

I have to meet certain requirements for this one program, and one of them is as follow: The program will require the user to enter the needed values one after another. If any of the entered values is invalid, then the program will detect that and go into a loop requiring the user to enter a valid value. The program must keep track of the total number of invalid values that the user has entered.

I know how to set a restriction and create a loop to keep asking the same question until it is satisfactory ( in this case I used a while loop) but I am at loss on how I should keep track of the total number of invalid values. I know I can use an increment but how do I set a variable for when the program meets an wrong input from the user.

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Sep 13, 2014

How to improve my code. I finally was able to create a program that gives you the corresponding letter grade, when you enter in a numeric grade without using an array. The only issue left is that I have to be able to enter 5 grades at a time, and it give me the letter grade for all 5. I have the programming working, but only am able to enter 1 at a time. I am not sure what kind of loop or if I am supposed to use a loop.

public static void main(String[] args){
{
int grade = 0;
Scanner input = new Scanner(System.in);
System.out.println("Enter : ");
grade = input.nextInt();
if (grade >= 90)

[Code] .....

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Aug 8, 2014

How do I retrieve values of an object?

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The object is initialized and i get no errors when entering values .. but when i try to print by calling getSoftware I get :

[Ldd1318398project4.Software;@257f6796

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Apr 25, 2015

simple assignment of values to a previously initialized object?

See the method useModel ()

The idea is, assign the values to the temporary object, data

Then plunk it into this statement:

model.addRow ( data );

Simple enough?

I've been putzing with the syntax for multiple hours, over days, now.

With and without

[0];,

Netbeans keeps giving me: Illegal start of expression data is declared as an array of Object, although, in this case, it does not need to be an array. What is the correct syntax?

Java Code: //--
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Date;
import javax.swing.JFrame;

[Code]....

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Feb 5, 2015

Let's pretend I'm working on an RPG. Like in all RPGs, there are items found all throughout the imaginary world. Each player and NPC can obtain an item. My question will concern those items.

In other words, I'd like to use instances of a class in multiple places of the code. Each instance will have its own, individual values of instance variables, with one obvious exception: itemQuantity should have a different value in playerInventory, npcInventory, etc. Also, I'd like a list of all items that can be found in the game. This list doesn't need itemQuantity at all.

class Items {
String itemName;
float itemWeight;
int itemQuantity;

[Code] ....

The question is: should I really make itemQuantity an instance variable of the Item class? It seems as though for each copy of the Item class I should create a separate copy with different value of itemQuantity, but that's not very efficient. Where is the error in my logic?

What's important is that there may be plenty items in a game and a player may be given power to create new items during the course of the game.

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import java.util.Iterator;
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Mar 8, 2015

I have an object that has an instance of another object class as its parameter :

CombinationLock oneHundred = new CombinationLock(28,17,39);
Locker Mickey = new Locker(100, "Mickey", 3, oneHundred);

This is for a locker, which has a combination assigned to the student. Within the locker class I have the following constructor:

public Locker(int locker, String student, int numberOfBooks, CombinationLock combo) {
this.locker = locker;
this.combo = combo;
this.student = student;
this.numberOfBooks = numberOfBooks;
}

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.

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Oct 30, 2014

public class Check2
{
private int red;
private int green;
private int blue;

public Check2(){
red = 0;
green = 0;
blue = 0;

[Code] .....

And when i uses it in another class named "Check" it returns zeroes :

public class Check
{
public static void main(String[] args) {
Check2 obj = new Check2(125,254,12); // the toString method should return the values i gave it here . but it shows me zeroes instead.
System.out.println("the colors are " + obj.toString());
}
}

Output : the colors are (0,0,0)

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Feb 11, 2015

So I want to write a constructor that creates a new object with the data from the array values. I don't know where to start. It's the last method in the code:

public class Measurements {
private double[] values;
private double[] newArray;
private int n; //numberofvalues
private double[] ms;
public Measurements(int max) { //constructor

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Dec 10, 2014

This program is basically complete. It compiles and runs. It is a college course assignment that I pretty much completed but for the last part in which I'm suppose to change the values of all fields and display the modified values using a toString method. Modifying the values of the fields is where I am stuck. I don't think I need to create a new text data file to do this. The instructor only asked that all the values of fields be changed and this was the last part of the assignment so I don't think it involves creating additional ObjectOutputStream and ObjectInputStream objects. I'm getting a NullPointerException error on line 161.Here is the code. I'm also including the input data file.

//create program so that objects of class can be serialized, implements interface Serialiable
//create constructor with 4 parameters with accompanying get and set methods, Override toString method
//create text file with 5 records, create Scanner object,ObjectOutputStream, and ObjectInputStream
//create new ItemRecord object, change values of all fields in ItemRecord object using object's set methods
//modify ItemRecord object using toString method

[hightlight =Java]import java.io.Serializable;
public class ItemRecord implements Serializable

[Code] .....

This is the error message:

----jGRASP exec: java ItemRecordReport

Item Cost Quantity Description
Number
A100 $ 99.99 10 Canon PowerShot-135
A200 $149.99 50 Panasonic-Lumix T55
A300 $349.99 20 Nikon- D3200 DSRL
A400 $280.99 30 Sony- DSC-W800
A500 $ 97.99 20 Samsung- WB35F
Exception in thread "main" java.lang.NullPointerException
at ItemRecordReport.main(ItemRecordReport.java:161)

----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.

Here is the data file:
A100 99.99 10 Canon PowerShot-135
A200 149.99 50 Panasonic-Lumix T55
A300 349.99 20 Nikon- D3200 DSRL
A400 280.99 30 Sony- DSC-W800
A500 97.99 20 Samsung- WB35F

Here is the data file for the modified field values.
B100 98.00 10 ABC1010
B200 97.00 15 DEF1020
B300 96.00 10 GHI1030
B400 95.00 05 JKL1040
B500 94.00 01 MNO1050

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Apr 2, 2014

How do i take input values for TwoDPoint (which are objects) and return it back in numerical values also print them.

When i create an object in main method and pass values to my function of return type TwoDPoint,it gives error:- found int,int need TwoDPoiint,TwoDPoint.

// Here is what i tried to do:

Created class TwoDPoint that contains two fields x, y which are of type int. Defined another class TestTwoDPoint, where a main method is defined.In the main method created two TwoDPoint objects.

Then I modified the class TestTwoDPoint and add another function to it. This function takes two TwoDPoints as input and returns the TwoDPoint that is farthest from the point (0,0).

Then I added another function to TestTwoDPoint. This function takes two TwoDPoints as input and returns a new TwoDPoint whose x value is the sum of x values of the input TwoDPoint's and whose y value is the sum of the y values of the input TwoDPoint's.

class TwoDPoint {
int x = 2;
int y = 4;
}
class TestTwoDPoint {
public static void main(String args[]) {
TwoDPoint obj1 = new TwoDPoint();
System.out.println(obj1.x);
System.out.println(obj1.y);

[Code] ....

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Hint: You'll need 'instanceof' and cast to a (Geocache)

So far I have:

public boolean equals(Object O){
if(O instanceof Geocache){
Geocache j=(Geocache) O;
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else return false;
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I think I have it correct up to the casting but I don't understand what I'm suppose to do with the this.equals(). Also I'm getting an error that I'm not returning a boolean... I get this all the time in other problems. I don't get why since I have to instances of returning booleans in this. "returns true if the given object equals this object" makes no sense to me. I assume the given object, in my case, is 'O'. What is 'this' object referring to?

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glReadPixels(mapStartX, mapStartY, mapWidth, mapHeight, GL_BLUE, GL_UNSIGNED_BYTE, currentBuffer);
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This works perfectly fine but turns out to be a real bottleneck, dropping the fps to a third of what it was. Is there any quicker way? All I'm after is speed, I don't even need to show it on the screen if the comparison is made "behind the scene".

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I enter a value in the text box in one class and want to pass that value to another class in order to compare it and color the cell in a table. In the first class I have

package cege.ui;
 import cege.controller.HtmlController;
import cege.controller.ScreenCaptureController;
...
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;

[Code] .....

How to pass the threshhold from the first to the second class?

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if (stringGQ != null && stringGW != null && stringGP != null){
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[Code] .....

Note: This is a small part of my code. when I leave it empty it take the 0 as a value, However, when I write in text field it also take the value of a 0 and the finalTotal is also = to 0.what I'm doing wrong.

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I am creating a slot machine using eclipse. I am trying to get the "winnings" JTextField to be updated in a way so that when the random images have been selected it adds to the number that is already displayed in the JTextField as opposed to what it is doing at the minute which is just displaying how much was won on that particular spin. I am also struggling to set a code for when noting is won, nothing is added. My code is below.

import java.awt.*;
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[Code] ....

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a visual aspect of it.

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Think about it as "If question = What color is the sky? On submit, display text "Blue". How to implement this.

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