Random numbers

[zel2zel]

how to implement the code for displaying random numbers to JTable

i know a different way to implement it but with the Netbeans's default generated code for the table, i have no idea how



jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [24][],
new String [] {
"PROCESS", "AT", "BT", "TYPE"
}
));

[KevinWorkman]

The best advice I can give you is to ditch the code generator and read this tutorial: How to Use Tables (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

[NRitH]

how to implement the code for displaying random numbers to JTable

i know a different way to implement it but with the Netbeans's default generated code for the table, i have no idea how



jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [24][],
new String [] {
"PROCESS", "AT", "BT", "TYPE"
}
));

It's easier to roll your own.

import java.math.Random;
import javax.swing.table.AbstractTableModel;

public void RandomTableModel extends AbstractTableModel {
  
  private int _rows;
  private int _cols;
  private Random _random;

  public RandomTableModel(int numRows, int numCols) {
    _rows = numRows;
    _cols = numCols;
    _rand = new Random(System.currentTimeMillis());
  }

  public int getRowCount() { return _rows; }
  public int getColumnCount() { return _col; }

  public Object getObjectAt(int row, int col) {
     return new Integer(_rand.nextInt(100));    // for random numbers from 0 to 99, incl.
  }
}

[KevinWorkman]

A few small issues, especially as your post is almost spoonfeeding:

There is no getObjectAt() function. That should probably be getValueAt().

Aren't you returning a new random number each time the model is called? I'm pretty sure that's not what the OP wants- he probably wants to initialize them to random values, then have them not change.

Are you an old-school programmer? Starting variables with an underscore goes against the standard naming conventions.