Okay so I am trying to figure out how to add text into a TextArea when a certain button is clicked in my GUI. For this current problem, When i click the reset button I want it to display a few lines of text that i have prewritten already. I am not sure how i would implement this into my applet.
here is my code for the the button
public class DisplayButtonPanel2 extends JPanel{
//create buttons for reseting back to original data, displaying data and sorting data
JButton resebutton = new JButton("RESET");
JButton displaybutton = new JButton("DISPLAY");
JButton sortbutton = new JButton("SORT");
//constructor
public DisplayButtonPanel2()
{
//create action listener object
BListen listener = new BListen();
//add action listen functionalty to buttons
resebutton.addActionListener(listener);
displaybutton.addActionListener(listener);
sortbutton.addActionListener(listener);
//add buttons to panel
add(resebutton);
add(displaybutton);
add(sortbutton);
}
public class BListen implements ActionListener
{
public void actionPerformed(ActionEvent event){
if (event.getSource() == resebutton){
JOptionPane.showMessageDialog(null,"reset Button Clicked");
DisplayEmployeePanel displayemply = new DisplayEmployeePanel();
displayemply.resetText();
}
else if(event.getSource() == displaybutton){
JOptionPane.showMessageDialog(null,"display Button Clicked");
// DisplayEmployeePanel displayemply = new DisplayEmployeePanel();
}
else if(event.getSource() == sortbutton){
JOptionPane.showMessageDialog(null,"sort Button Clicked");
}
}
}
code for the textArea
public class DisplayEmployeePanel extends JPanel{
//create a text area that will display employees
JTextArea employeetextarea = new JTextArea("~Company Employee's~", 20 ,30); //textinarea, hieght, width
//constructor
public DisplayEmployeePanel()
{
employeetextarea.setEditable(false); //will not be able to edit text in area
String ns = "\nDisplay Employee Info BELOW";
employeetextarea.append(ns);
//add text area to panel
add(employeetextarea);
}
public void resetText()
{
String sn = "\nreset to original emmployee list";
employeetextarea.append(sn);
add(employeetextarea);
System.out.println("reset text");///testing purposes
}
}//end class
EDIT* adding in more source code if that helps, this code for creating frame
public class CreateCompanyGUI extends JFrame{
//constructor
public CreateCompanyGUI()
{
super("Company Applet!"); //tittle
setSize(800,800); //set size *careful when using pack*
setLocationRelativeTo(null); //places frame in middle of screen by default
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //how to close
setLayout(new BorderLayout()); //set BorderLayout manager for this frame
//create panels
DisplayEmployeePanel dep = new DisplayEmployeePanel();
// DisplayEmployeePanel2 dep2 = new DisplayEmployeePanel2();
DisplayButtonPanel dbp = new DisplayButtonPanel();
DisplayButtonPanel2 dbp2 = new DisplayButtonPanel2();
// DisplayListPanel dlp = new DisplayListPanel();
//add panels to frame
add(dep, BorderLayout.NORTH);
add(dbp2, BorderLayout.CENTER);
add(dbp, BorderLayout.SOUTH);
// add(dlp, BorderLayout.EAST);
// add(dep2, BorderLayout.CENTER);
//pack (packs the window and creates appporiate size
pack();
//visible = TRUE (so we can see the frame)
setVisible(true);
}
}//end class
code for creating GUI
public class CompanyApplet extends JApplet{
public static void main(String[] args)
{
//create GUI for company applet
new CreateCompanyGUI();
}
}
DisplayEmployeePanel displayemply = new DisplayEmployeePanel();
displayemply.resetText();
You can't keep creating a new DisplayEmployeePanel. You want to update the textarea of the existing panel that is visible on the GUI. Then means that the DisplayButtonPanel2, needs a reference to the DisplayEmployeePanel.
So in your code where you create the two panels and add them to the frame you need to pass the DisplayEmployeedPanel as a parmameter to the DisplayButtonPanel2.
Or the simpler solution is to just have a single class that create the two panels. Then all the methods in that class have access to all the components defined in the class.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.