For my project I have to write a piece of code where it returns true or false value depending whether the indicated cell is on edge of a rectangular grid (true) or not (false). Any algorithm for the following method: public static boolean onEdge (int n, int numRows, int numCols)?? To highlight, numRows and numCols and n start from 0.
View RepliesI am doing an assignment which involves creating a maze and a ball that needs to go through the maze to an end tile then stop the scenario. The maze is made up of 208 buttons in a Jbutton Grid layout. I am replacing certain buttons with a brown tile icon to make up the maze. The ball needs to run along those brown tiles as its path and not be able to move off the brown tile icon images.
I have built the maze and have got quite far with this but now I am stumped on the concept of keeping the ball within the boundary edges and on the brown tiles. I have been told to use if statements, but not had the process explained to me in a way I can understand.
I'm trying to get my animation for my java game to move along the edges of my device. Once it hits the edge I would like it to turn and keep moving along the edges. I'm sure this is easier than I'm making it but I can't find much on this. Right now my animation moves right and goes right off the screen until the app is closed and restarted.
This is my code so far:
package com.pjf.animation;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
[Code] .....
Getting this error message.
non-static variable Text1 cannot be referenced from a static context
Text1 - a TextField on Form
How do i parse a String of text in a JTable Cell to work as a button?For example lets say a row of IDs such as 1,2,3,4,5,6 id like the whole column to parse as JButtons that are titled 1,2,3,4,5,6..Id like to then use these buttons to call a function with the title as a parameter.Its just a simple row of entries where the button will open up an edit screen to edit the corresponding clicked entry.So how do i parse them as buttons for a start?
View Replies View RelatedI am currently trying to write a method for checking to see if an "agent" in a cell (place in a 2d array) is satisfied. So, the assignment is a 2D array that can have a blank space, an O, or a X as a character that fills a particular space. An agent is satisfied if it has similar characters around it in a percentage that is higher than the threshold. For example, if the threshold was 60% and a cell that had an X in it, had 3 X's around it and 2 O's, then it would be satisfied because 3/5>=60%. For my code, I tried using if and else statements to isolate circumstances in the corner of the grid, the edges, and everything in between.
public static boolean isSatisfied(char[][] tissue, int row, int col, int threshold){
char check= tissue[row][col];
if (check==' '){
return true;
}
else{
int countx = 0;
int count = 0;
[Code] ....
I created tableviewer ( jface ). All the columns are editable ( using EditingSupport )
I want to know when cell is changed and then to raise a flag in other column. meaning that you start to write any data in the cell. I know that I need to create event of key changed listener to the cells. ( or there is different way )
How I can have access to the cell ? where do I need to add the event
public class MyGridViewer extends TableViewer {
public MyGridViewer (Composite parent) {
super(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.BORDER);
final Table table = this.getTable();
table.setHeaderVisible(true);
table.setLinesVisible(true);
[Code] ....
My latest issue was that I wanted to only get a double value into a JTable Cell.
So first I Overrode the getCellEditor(int row,int col) method of my JTable, so if I was in a cell i knew I needed a double value I returned my Editor.
My editor filters out anything but numbers. I also check to make sure we get one and only one decimal point.
Other solutions Ive seen use keyboard Listeners, but to me that doesn't work. What if the user cuts and pastes data? My solution handles that as well.
It doesn't handle if they try to cut and paste something like 1234abcd.bob.123.23 , this would result in 1234..123.23 pasted in. I'll handle faulty values on the getValue method of my AbstractTable, but as long as the user is using mostly valid data this works well.
public TableCellEditor getCellEditor(int row, int col) {
if (row==TheRowWant && col==TheColumnI want) {
return (new DefaultCellEditor(createDoubleTextField()));
}
}
private JTextField createDoubleTextField() {
final JTextField field = new JTextField();
[Code] .....
im trying to make a gui im trying to add a new jbutton for every empty cell in the array, and for some reason its giving me array index out of bounds error, this is what i have, im trying to to do it in an 80 by 80 array.
public JButton[][] buttons = new JButton[80][80];
public void addButtons(){
for(int i=0;i<buttons.length;i++){
for(int j=0;i<buttons[i].length;j++){
buttons[i][j]= new JButton();
}
}
}
ok so im doing a treasure hunt thing game and the situation is this: i already made a 5 by 5 array of integers and i placed the "treasure" on the 4th row of 3rd column. The problem is this i am asked to print the cell where the user visits. it should look like this
* * * * *
* * * * *
* * * * *
* * * * *
* * * * *
and when the user inputs 12 it should look like this
1 represents the row and 2 represents the column
* 34 * * *
* * * * *
* * * * *
* * * * *
* * * * *
the 34 represents the clue on where should the user go.
my problem is i can print the * and i already made the array pool
int[][] array = new int [][] {
{21, 34, 42, 23, 14},
{12, 31, 55, 32, 24},
{15, 51, 53, 13, 41},
{25 ,22, 44, 33, 54},
{45, 35, 53, 43, 52}
};
but i cant replace the * with what cell it is representing
btw i printed the * like this
for (i = 1; i <=5; i++) {
for (j = 1; j <=5; j++) {
System.out.print("* ");
}
System.out.println ();
}
I am trying to do a simple noughts and crosses game. I have displayed a board using a 2 dimensional array and display it using a for loop. The array is of type int. What I want to do is allow the user to choose a specific cell within the array to change to an x or o but I am not sure how to go about doing this. I have seen lots of examples of noughts and crosses online but seem to all be examples of how to check a win or lose situation.how to allow a user to choose certain cells in a 2d array would be great.
View Replies View RelatedI want perform some calculations whenever a specific cell block is focused in JTable, I've tried using focusListener on JTable but looks like my table isn't triggering the event. I don't know why, what to do?
View Replies View RelatedI'm working on a spreadsheet like app using JTable and was wondering if I can make the first cell of the table be selected when the window opens. Is there a way to do so?
View Replies View RelatedI have an editable JTable that has a lot of JComboBox's as cell entries. I would like to be able to "arrow over" to said cell, and with a pressing of either a numerical button or by typing the first letter of the String selection (possibly followed by a second), be able to select the appropriate selection from the cell's JComboBox. I have tried to add a key listener to the JComboBox itself, which works given that I click on said cell and show its menu.
How would I go about ensuring that, when focus is on the cell itself, and I start typing, the appropriate selection is chosen?? (I think this might get into key binding, but I don't know if I have to try it from the scope of JTable, or from that JTable's TableModel (which I have made my custom version of).
Here is what I have so far (everything but SandwichNumber, SandwichName, and Oregano uses JComboBox): [URL] ...., how would I do such key binding?
Here is another cell colouring question with a different take. Say you have a TableView with three columns - Category, In and Out. You add an empty row and then you start editing the Category column. When you have added a category you would like to see a change in the colour of the other two column cells in the same row depending on the category value.
Say if the category is 'income' then the 'In' cell will become green and the 'Out' cell becomes red. The important point here is that these cells and the underlying domain object does not have any values associated with these columns yet. The cells are empty and colour change is to show the user where the value should be put for the given category (into the green cell ).
Therefore after the category value is committed a 'message' needs to be propagated from the category column to the current row (or the whole table) to repaint itself. I have tried calling the following methods from the Category column's 'commit()' method but neither of them triggers a repaint:
- getTableRow().requestLayout();
- getTableRow().updateTableView(getTableView())
- getTableRow().updateIndex(getTableView().selectionModelProperty().get().selectedIndexProperty().get());
Once the re-paint is triggered then both In and Out column table cells can take the current category value from the underlying domain object (say MyRecord) like this
MyRecord record = getTableView().getItems().get(getTableRow().getIndex());
String category = row.getCategory();
and call the setStyle(".....") on the cell to change the colour.
I searched a lot and got some answers for this Q. but many of them referred to links which give 404 error. I want to make table like this:
Can I make this in Java?
I want to set different colors for different columns in the table. I use JLabel for setting the background color. Here is the code
private Color colorGreen= new Color( 44, 222, 74);
private Color colorYellow= new Color(255, 255, 0);
..
...
...
if(column == 0)
setBorder(new EmptyBorder(1, 1, 1, 0));
[Code] .....
But the color of the columns stays white, doesn't change.
I am trying to do the fallowing ,
Jtable cell with search (% like) depends on the value entered
if i enter "mi" it should show all data begin with "mi" from my data set
I have some project, and I wanted to show some long text stored in MySql database, on a java control such as JTextArea.Here is part of my code
infoPanel.add(new JLabel("Description"));
JTextArea desc = new JTextArea(7, 8);
desc.setText(c.getDescription());
desc.getFont().deriveFont(Font.BOLD);
desc.setForeground(Color.BLUE);
infoPanel.add(new JScrollPane(desc));
c.getDescription retrieves a long text from database. When it is displayed, it will be very wide, how can I make it more visible or break the text.
I am facing some peculiar issue with JTable.
Change value of a cell, without clicking on anywhere else, directly click on column (or) try to expand column size, value you entered in that cell vanishes. But if you click on any other cell instead of expanding column size, value will remain in cell. Not really sure how to fix this issue.
class SimpleTableExample
extends JFrame
{
// Instance attributes used in this example
privateJPaneltopPanel;
privateJTabletable;
privateJScrollPane scrollPane;
[Code] ....
I have assigned random numbers to an 2D array, and I had to write a method that prompts the user for a number between 100 and 200. If that number is in the array, it should return 1. If not, 0. It only stays 0 though, even when the number matches one of the numbers in the array.
public static int Findit(int[][] numbers, int guess) {
int Findit = numbers[0][0];
int i = 0;
int x = 0;
boolean found = false;
for(i=0;i<numbers.length;i++)
[Code] ....
where to find the following import the files?
import de.uos.fmt.musitech.data.score.NotationStaff;
import de.uos.fmt.musitech.data.score.NotationSystem;
import de.uos.fmt.musitech.data.score.NotationVoice;
import de.uos.fmt.musitech.data.score.ScoreNote;
import de.uos.fmt.musitech.data.structure.Context;
import de.uos.fmt.musitech.data.structure.Note;
import de.uos.fmt.musitech.data.structure.Piece;
import de.uos.fmt.musitech.data.structure.linear.Part;
import de.uos.fmt.musitech.score.mpegsmr.Attributes;
import de.uos.fmt.musitech.utility.math.Rational;
I have been struggling to find out what to change to allow my code to find the GCF of two numbers. The instance variable in the class is num, so I need to find the GCF of a and num. It works for the example problem of 25 and 15, returning 5, however it will not work for other problems.
public int findGCD(int a)
{
int result = 0;
int newNum = num;
if ((a > num) && (a % num != 0))
[Code] .....
I have a number of cells which are Dates and need to have them appear in the same format. The samples I have seen usually create a new cell renderer object for each cell, even if its the same type. Since I have a number of Date cells I thought it best to use a single object for each of the date cells, but after seeing the different samples I am wondering if there is something I may be missing where using the same cell renderer object could potentially be an issue.
View Replies View RelatedWhat I'm trying to do is make an inventory type program that includes a jtable. In the Jtable in the last column there will be 2 buttons and a textfield to register the value of additions or subtractions to the overal stock amount. (See screenshot in attachment).
As of now I am able to increment or decrement the numbers when the buttons are clicked on however the problem is that if I add 2 to the first row, and then go to add 2 to the next row or any other row for that matter, the value of the previous row is added to the next row, and the previous row reverts back to a value of 0. So basically its like there is only one editor that keeps track of one value no matter what row you are editing.
I need getting it so that I can add different values to each different row depending on the stock being used or received. The following is my code:
Main class
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(10, 155, 643, 233);
IMG.add(scrollPane);
center = new centerJustify();
ts = new tableCellRenderer();
tm = new DefaultTableModel(){
[Code] .....
I'm working on a spreadsheet-like table and I was able to set it so that it would highlight the first cell in the relevant row(titled 1,2,3.. etc) when a cell is clicked. (Just like in MS Excel - preview attached) Now I want to do the same to the column header(i.e. A,B,C,D....etc) . How can I do it?
private void formWindowOpened(java.awt.event.WindowEvent evt) {
setLocationRelativeTo(null);
int rowNum = sheet.getRowCount();
for(int i=0; i<rowNum; i++){
sheet.setValueAt(i+1, i, 0);
[Code] ......