janice white

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since Jan 27, 2012

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Recent posts by janice white

Get Value of dynamically create dropdownlist in JSP

I am new to JSP and servlet for 1 month, and there are many things that I am still unsure off.. Inside a JSP, I have a dropdownlist(the values inside are grab from database) and it would be dynamically created on the number that the user keyed in. Example, the user key in 3, this digit would store in session, and 3 dropdownlist would be generated.

I am able to do this, however I am unable to grab the value of all the 3 dropdownlist in a servlet. and instead of getting 3 diff values, the output repeat the value of the first dropdownlist. Example "john,john,john" instead of "john, ken, andy".

JSP:

Servlet:

Can i set the downdownlist name like "list<%i%>", to set different id to each downdownlist? therefore i can retrieve each of them seperately???

8 years ago

JSP

Get value from textarea that retrieve from session

How to get a textarea value when the value is retrieve from session??

Code:

<textarea rows="5" cols="37" id="desc" name="desc"><%=announce[i].getaDesc() %></textarea>

I keep getting a null when i use

String a = request.getParameter("desc");

Is there any method where i can retrieve the value?

8 years ago

Servlets

what had happen to this?

What does the error "A previous error prevented bean from being created" mean?
I am trying to open up a Swing window in Visual Editor but could not see all the widgets. I can only see a "this" icon, with "i" indicator which is shown as the image attached.
I do not know how to solve this error..
Please help me.

Here is the code.
I can view the panel when i run it. But there is no image in the visual editor.

package OOPJ.ui;
import javax.swing.JPanel;
import java.awt.Dimension;
import javax.swing.JLabel;
import java.awt.Rectangle;
import java.awt.Point;
import javax.swing.ImageIcon;
import java.awt.Color;
import java.awt.event.KeyEvent;
import javax.swing.SwingConstants;
import javax.swing.JTextField;
import cancer.entity.CancerDetails;
import javax.swing.JTextArea;
import javax.swing.JButton;
import java.awt.Font;
public class CancerDetailsPanel extends JPanel {
private static final long serialVersionUID = 1L;
private JLabel jLabelTitle = null;
private JTextField jTextFieldArticleTitle = null;
private JLabel jLabelImg = null;
private JTextArea jTextAreaDetails = null;
private CancerDetails cancer = null;
private MainFrame myFrame = null;
/**
* This is the default constructor
*/
public CancerDetailsPanel() {
super();
initialize();
}
public CancerDetailsPanel(MainFrame f) {
this();
myFrame = f;
}
/**
* This method initializes this
*
* @return void
*/
private void initialize() {
jLabelImg = new JLabel();
jLabelImg.setBounds(new Rectangle(41, 198, 257, 248));
jLabelImg.setText("");
jLabelImg.setDisplayedMnemonic(KeyEvent.VK_UNDEFINED);
CancerDetails c1 = new CancerDetails();
jLabelImg.setIcon(new ImageIcon(c1.getC_image1()));
jLabelImg.setHorizontalAlignment(SwingConstants.CENTER);
jLabelTitle = new JLabel();
jLabelTitle.setText("");
jLabelTitle.setSize(new Dimension(431, 70));
jLabelTitle.setIcon(new ImageIcon(getClass().getResource("/images/ui/images/Cancer Title.jpg")));
jLabelTitle.setHorizontalAlignment(SwingConstants.CENTER);
jLabelTitle.setLocation(new Point(131, 27));
this.setSize(700, 800);
this.setLayout(null);
this.setBackground(Color.white);
this.add(jLabelTitle, null);
this.add(getJTextFieldArticleTitle(), null);
this.add(jLabelImg, null);
this.add(getJTextAreaDetails(), null);
CancerDetails u1 = new CancerDetails();
u1.retrieveCancer();
jTextFieldArticleTitle.setText(u1.getC_articleTitle());
jTextAreaDetails.setText(u1.getC_articleDetails());
}
/**
* This method initializes jTextFieldArticleTitle
*
* @return javax.swing.JTextField
*/
private JTextField getJTextFieldArticleTitle() {
if (jTextFieldArticleTitle == null) {
jTextFieldArticleTitle = new JTextField();
jTextFieldArticleTitle.setBounds(new Rectangle(35, 119, 634, 46));
jTextFieldArticleTitle.setHorizontalAlignment(JTextField.CENTER);
jTextFieldArticleTitle.setBackground(Color.white);
jTextFieldArticleTitle.setEditable(false);
}
return jTextFieldArticleTitle;
}
/**
* This method initializes jTextAreaDetails
*
* @return javax.swing.JTextArea
*/
private JTextArea getJTextAreaDetails() {
if (jTextAreaDetails == null) {
jTextAreaDetails = new JTextArea();
jTextAreaDetails.setBounds(new Rectangle(313, 177, 369, 307));
}
return jTextAreaDetails;
}
} // @jve:decl-index=0:visual-constraint="116,111"

10 years ago

Other IDEs, Version Control