Java - how to make "runnable" JTable?

Java - how to make "runnable" JTable?

By : Emsa
Date : October 26 2020, 11:51 AM
this will help If you are using Swing and want to perform an action on a time interval, you should use a swing timer, as described in the tutorial.
Translating your loop into a sequence of calls to actionPerformed, you get:
code :

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"implements Runnable" vs "extends Thread" in Java

"implements Runnable" vs "extends Thread" in Java

By : Chris
Date : March 29 2020, 07:55 AM
I hope this helps you . Yes: implements Runnable is the preferred way to do it, IMO. You're not really specialising the thread's behaviour. You're just giving it something to run. That means composition is the philosophically "purer" way to go.
In practical terms, it means you can implement Runnable and extend from another class as well.
Java 6 Threads - different behaviour with "implements Runnable" and "extends Thread"

Java 6 Threads - different behaviour with "implements Runnable" and "extends Thread"

By : James Wood Jimmy
Date : March 29 2020, 07:55 AM
With these it helps Second Case (threadA.run()) : -
Since threadA is a reference of type UsingThreadExtension: -
code :
UsingThreadExtension threadA = new UsingThreadExtension("Thread A");
Thread threadB = new Thread(runnableImplementation, "Thread B");
java Runnable - Exception in thread "main" java.lang.NoClassDefFoundError

java Runnable - Exception in thread "main" java.lang.NoClassDefFoundError

By : user3030304
Date : March 29 2020, 07:55 AM
it should still fix some issue The below is called an anonymous inner class. The Runnable interface normally could not be instantiated, but you are extending it on the fly to create a new class that implements Runnable.
code :
final Runnable r = new Runnable() {
  public void run() {
Unable to populate/update a data into another JTable "B" onclick on a specific row in JTable "A"

Unable to populate/update a data into another JTable "B" onclick on a specific row in JTable "A"

By : Ahmed Ayman
Date : March 29 2020, 07:55 AM
should help you out I checked your code, I thınk the problem is your are creating a new table every time a selection occurs.
code :
 public JTable menuTableMethod(String []title, String [][]data){
        menuTable = new JTable(data, title);
JTable availableRestaurantsTable,  orderSummaryTable;

DefaultTableModel defaultModel = new DefaultTableModel();
JTable menuTable = new JTable(defaultModel);
public JTable menuTableMethod(String []title, String [][]data){
    //menuTable = new JTable(data, title);
    defaultModel.setDataVector(data, title);

    menuTable.setPreferredScrollableViewportSize(new Dimension(380, 250));
    //JOptionPane.showMessageDialog(null, "Table update ! ");

    return menuTable;
    availableRestaurantsTable.addMouseListener(new MouseAdapter() {
        public void mouseClicked(MouseEvent e) {
            String cellValue = (String)availableRestaurantsTable.getValueAt(availableRestaurantsTable.getSelectedRow(), availableRestaurantsTable.getSelectedColumn());

            if(cellValue.compareTo("Bar & Boeuf") == 0){
                JOptionPane.showMessageDialog(null, "Yeap! Same\n"+cellValue);
                menuTableMethod(title2, dataUpdate);

How can I make a java program to understand the user-input "t" as "true" and "f" as "

How can I make a java program to understand the user-input "t" as "true" and "f" as "

By : DNI
Date : March 29 2020, 07:55 AM
this one helps. I have to code a program, that's working with boolean operators. The first thing this program should do is to ask the user for an operator by "command:". The user can only enter "&&", "||", "!" and "quit". Quit just shuts down the program. The next thing it does is to ask the user for a boolean variable, but here is my problem: The program works perfectly fine with entering "true" or "false", but the task I've got says, the user can only use "t" for "f" as input. So here is my question: How can I make the program to understand "t" as "true" and "f" as "false"?(by the way if the user enters"!" the program just outputs the negation of the first parameter) , The easiest way would be to write a little method, something like:
code :
boolean customParseBoolean(String input) {
  if ("t".equals(input)) {
    return true;
  } else if ("f".equals(input)) {
    return false;
  // You don't have to throw an exception on invalid input; just an example.
  throw new IllegalArgumentException("Invalid input: " + input);
boolean parameter1 = customParseBoolean(eingabe.nextLin());
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