I've created an application in java swing, in which an JInternalFrame is visible on clicking a button on JFrame. The internalFrame consists of table with 32 columns in which values are added dynamically.
The problem is that when we click on to the button The JInternalFrame is taking a bit delay in loading .Is that looping in the code makes it delay
Can anyone please tell me some solution to prevent the delay in loading...
public class AttendanceView extends javax.swing.JInternalFrame {
private int count=0;
String []columnNames={"<html><b>Name</b></html>","<html><b>1</b></html>","<html><b>2</b></html>",""
+ "<html><b>3</b></html>",""+ "<html><b>4</b></html>",""
+ "<html><b>5</b></html>",""+ "<html><b>6</b></html>",""
+ "<html><b>7</b></html>",""+ "<html><b>8</b></html>",""
+ "<html><b>9</b></html>",""+ "<html><b>10</b></html>",""
+ "<html><b>11</b></html>",""+ "<html><b>12</b></html>",""
+ "<html><b>13</b></html>",""+ "<html><b>14</b></html>",""
+ "<html><b>15</b></html>",""+ "<html><b>16</b></html>",""
+ "<html><b>17</b></html>",""+ "<html><b>18</b></html>",""
+ "<html><b>19</b></html>",""+ "<html><b>20</b></html>",""
+ "<html><b>21</b></html>",""+ "<html><b>22</b></html>",""
+ "<html><b>23</b></html>",""+ "<html><b>24</b></html>",""
+ "<html><b>25</b></html>",""+ "<html><b>26</b></html>",""
+ "<html><b>27</b></html>",""+ "<html><b>28</b></html>",""
+ "<html><b>29</b></html>",""+ "<html><b>30</b></html>",""
+ "<html><b>31</b></html>"};
String dataValues[][];
public AttendanceView() {
initComponents();
try
{
dataValues=new String[10][32];
int i=0;
for(i=0;i<5;i++)
{
for(int j=0;j<32;j++)
{
if(j==0)
dataValues[i][0]="Manu Suseelan";
else
dataValues[i][j]="<html><body style='background:green;color:green'> ||| </center></html>";
}
}
} catch (Exception ex) {System.out.println("sql error:"+ex);
}
DefaultTableModel df = new DefaultTableModel();
df.setDataVector(dataValues,columnNames);
table.setModel(df);
int index=0;
while (index < 32) {
TableColumn a = table.getColumnModel().getColumn(index);
a.setPreferredWidth(100);
a.setResizable(false);
index++;
}
TableColumn a = table.getColumnModel().getColumn(0);
a.setPreferredWidth(1000);
}
...
there no problem with performance, only picture can caused that, put image to the java package, code example (based on last related post @Andrew Thompson), as mentioned, to use Renderer instead of Html formatting,
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
public class TableWithHtml {
private int count = 0;
private String[] columnNames = {"<html><b>Name</b></html>", "<html><b>1</b></html>", "<html><b>2</b></html>", ""
+ "<html><b>3</b></html>", "" + "<html><b>4</b></html>", ""
+ "<html><b>5</b></html>", "" + "<html><b>6</b></html>", ""
+ "<html><b>7</b></html>", "" + "<html><b>8</b></html>", ""
+ "<html><b>9</b></html>", "" + "<html><b>10</b></html>", ""
+ "<html><b>11</b></html>", "" + "<html><b>12</b></html>", ""
+ "<html><b>13</b></html>", "" + "<html><b>14</b></html>", ""
+ "<html><b>15</b></html>", "" + "<html><b>16</b></html>", ""
+ "<html><b>17</b></html>", "" + "<html><b>18</b></html>", ""
+ "<html><b>19</b></html>", "" + "<html><b>20</b></html>", ""
+ "<html><b>21</b></html>", "" + "<html><b>22</b></html>", ""
+ "<html><b>23</b></html>", "" + "<html><b>24</b></html>", ""
+ "<html><b>25</b></html>", "" + "<html><b>26</b></html>", ""
+ "<html><b>27</b></html>", "" + "<html><b>28</b></html>", ""
+ "<html><b>29</b></html>", "" + "<html><b>30</b></html>", ""
+ "<html><b>31</b></html>"};
private String dataValues[][];
public TableWithHtml() {
JPanel gui = new JPanel(new BorderLayout());
gui.setBorder(new EmptyBorder(2, 3, 2, 3));
JDesktopPane dtp = new JDesktopPane();
gui.add(dtp);
ActionListener listener = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
Component c = (Component) e.getSource();
JOptionPane.showInternalMessageDialog(c, "Message");
}
};
for (int ii = 0; ii < 13; ii++) {
try {
dataValues = new String[10][32];
int i = 0;
for (i = 0; i < 5; i++) {
for (int j = 0; j < 32; j++) {
if (j == 0) {
dataValues[i][0] = "Manu Suseelan";
} else {
dataValues[i][j] = "<html><body style='background:green;color:green'> ||| </center></html>";
}
}
}
} catch (Exception ex) {
System.out.println("sql error:" + ex);
}
DefaultTableModel df = new DefaultTableModel();
df.setDataVector(dataValues, columnNames);
JTable table = new JTable();
table.setModel(df);
int index = 0;
while (index < 32) {
TableColumn a = table.getColumnModel().getColumn(index);
a.setPreferredWidth(100);
a.setResizable(false);
index++;
}
JInternalFrame jif = new JInternalFrame();
dtp.add(jif);
jif.setResizable(true);
jif.setLocation(new Point(ii * 30, ii * 20));
jif.setSize(600, 150);
jif.setVisible(true);
JButton b = new JButton("Click me!");
b.addActionListener(listener);
jif.add(table, BorderLayout.CENTER);
jif.add(b, BorderLayout.SOUTH);
}
gui.setPreferredSize(new Dimension(1000, 600));
gui.setBackground(Color.WHITE);
JFrame f = new JFrame("Demo");
f.add(gui);
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
f.setLocationByPlatform(true);
f.pack();
f.setVisible(true);
}
public static void main(String[] args) throws Exception {
Runnable r = new Runnable() {
@Override
public void run() {
TableWithHtml tableWithHtml = new TableWithHtml();
}
};
SwingUtilities.invokeLater(r);
}
}