Question

I’m try to change the text on a JLabel when the Jbutton is clicked but i can’t figure it out why it turns the text into empty when i clicked the button. I’m trying to retrieve the data from the database.

heres my label

labelDisplay = new JLabel[7];

for(int z = 0; z<7; z++){
    labelDisplay[z] = new JLabel("d");
    labelDisplay[z].setForeground(new Color(230,230,230));
    if( z%2==0)
        labelDisplay[z].setBounds(130,65,160,25);
    else
        labelDisplay[z].setBounds(130,30,160,25);
}

I’m sure that my class for retrieving date is working i test it out.
heres my actionListener:

    public class ButtonHandler implements ActionListener
        {
            public void actionPerformed(ActionEvent e)
            {
                if(e.getSource() == extendB)
                {
                    ExtensionForm extend = new ExtensionForm();
                    extend.setVisible(true);
                }
                else if(e.getSource()== searchB)
                {
                    //get text from the textField
                    String guest = guestIDTF.getText();
                    //parse the string to integer for retrieving of date
                    int id = Integer.parseInt(guest);
                    GuestsInfo guestInfo = new GuestsInfo(id);
                    Room roomInfo = new Room(id);
                    searchB.setText(""+id);
                    System.out.println(""+guestInfo.getFirstName());
                    labelDisplay[1].setText(""+id);
                    String labels[] = {guestInfo.getFirstName()+" "+guestInfo.getLastName(),
                            ""+roomInfo.getRoomNo(),roomInfo.getRoomType(),guestInfo.getTime(),"11:00",
                            ""+guestInfo.getDeposit(),"30"};
                    labels = new String[7];
                    for(int z = 0; z<labels.length; z++){
                        labelDisplay[z].setText(labels[z]);
                    }

                }
        }
    }

I did put an initial value for the label text, as you can see from my code it’s letter “d” but when i clicked the button it turns to empty.The accessor methods there are really working that why i suspect that the error is from my actionListener. Please help me guys

I edit the constructor it should be id not 1.

Heres the code for the actionListener for the button

ButtonHandler bh = new ButtonHandler();
searchB = new JButton("search");
searchB.setBounds(190,30,75,25);
searchB.addActionListener(bh);

Answer 1

 labelDisplay[1].setText(""+id);

 String labels[] = {guestInfo.getFirstName()+" "+guestInfo.getLastName(),
      ""+roomInfo.getRoomNo(),roomInfo.getRoomType(), guestInfo.getTime(),
      "11:00", ""+guestInfo.getDeposit(),"30"};

 labels = new String[7];

 for(int z = 0; z<labels.length; z++){
      labelDisplay[z].setText(labels[z]);
 }

You never set your labels to something valid. Remove labels = new String[7];

Should have checked the code well sorry!