Ok, so i made this inner class:
class AutoSelect extends FocusAdapter {
public void focusGained(FocusEvent e)
{
if (e.getComponent() instanceof JTextField)
{
JTextField t = (JTextField) e.getComponent();
t.selectAll();
}
}
}
but can't figure out how to pass to it and use it. I basically need my JTextField (scoreTextField) to auto select the stuff inside the text box. (the user clicks it and it will select all text in the box without them having to manually click and drag over it.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.*;
import java.lang.Math;
public class StudentScoresApp {
public static void main(String[] args) {
System.out.println(" List of Student Scores Entered");
JFrame frame = new StudentScoresFrame();
frame.setVisible(true);
}
class AutoSelect extends FocusAdapter {
public void focusGained(FocusEvent e)
{
if (e.getComponent() instanceof JTextField)
{
JTextField t = (JTextField) e.getComponent();
t.selectAll();
}
}
}
}
class StudentScoresFrame extends JFrame {
public StudentScoresFrame() {
setTitle("Test Scores");
setSize(310, 220);
centerWindow(this);
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new StudentScoresPanel();
this.add(panel);
}
private void centerWindow(Window w) {
Toolkit tk = Toolkit.getDefaultToolkit();
Dimension d = tk.getScreenSize();
setLocation((d.width-w.getWidth())/2, (d.height-w.getHeight())/2);
}
}
class StudentScoresPanel extends JPanel implements ActionListener {
private JTextField scoreTextField,
countTextField,
averageTextField,
bestTextField,
lowestTextField;
private JLabel scoreLabel,
countLabel,
averageLabel,
bestLabel,
lowestLabel;
private JButton enterScoreButton,
clearButton,
exitButton;
private int count = 0;
private double total = 0;
// total is a double to prevent truncation when
// calculating the average
private double average = 0;
private int best = 0;
private int lowest = 100;
public StudentScoresPanel() {
// display panel
JPanel displayPanel = new JPanel();
displayPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
// score label
scoreLabel = new JLabel("Test Score:");
displayPanel.add(scoreLabel);
// score text field
scoreTextField = new JTextField(13);
displayPanel.add(scoreTextField);
scoreTextField.addActionListener(this);
// count label
countLabel = new JLabel("Number of Scores:");
displayPanel.add(countLabel);
// count text field
countTextField = new JTextField(10);
countTextField.setEditable(false);
countTextField.setFocusable(false);
displayPanel.add(countTextField);
// average label
averageLabel = new JLabel("Average Score:");
displayPanel.add(averageLabel);
// average text field
averageTextField = new JTextField(13);
averageTextField.setEditable(false);
averageTextField.setFocusable(false);
displayPanel.add(averageTextField);
// best label
bestLabel = new JLabel("Highest score:");
displayPanel.add(bestLabel);
// best text field
bestTextField = new JTextField(12);
bestTextField.setEditable(false);
bestTextField.setFocusable(false);
displayPanel.add(bestTextField);
// lowest label
lowestLabel = new JLabel("Lowest score:");
displayPanel.add(lowestLabel);
// lowest text field
lowestTextField = new JTextField(10);
lowestTextField.setEditable(false);
lowestTextField.setFocusable(false);
displayPanel.add(lowestTextField);
// button panel
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
// enter score button
enterScoreButton = new JButton("Enter Score");
enterScoreButton.addActionListener(this);
buttonPanel.add(enterScoreButton);
// clear button
clearButton = new JButton("End/Clear Entries");
clearButton.addActionListener(this);
buttonPanel.add(clearButton);
// exit button
exitButton = new JButton("Exit");
exitButton.addActionListener(this);
buttonPanel.add(exitButton);
// add panels to main panel
this.setLayout(new BorderLayout());
this.add(displayPanel, BorderLayout.CENTER);
this.add(buttonPanel, BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if (source == exitButton){
if (count == 0){
lowest = 0;}
NumberFormat ef = NumberFormat.getNumberInstance();
ef = new DecimalFormat("###.00");
System.out.println("\n Highest: " + best + " Lowest: " + lowest + " Average: " + ef.format(average) + "\n");
System.out.printf(" Program terminated by the User.");
System.out.printf("\n");
System.exit(0);
System.exit(0);
}
else if (source == enterScoreButton) {
// parse the score
int score = Integer.parseInt(scoreTextField.getText());
// Validate the number is in proper range
if (score < 0)
JOptionPane.showMessageDialog(null, "The lowest possible score for data entry is 0-Points. Please re-enter.", "Invalid Entry", JOptionPane.ERROR_MESSAGE);
if (score > 100)
JOptionPane.showMessageDialog(null, "The highest possible score for data entry is 100-Points. Please re-enter.", "Invalid Entry", JOptionPane.ERROR_MESSAGE);
else
// calculate the results
total += score;
count++;
average = total / count;
if (score > best)
best = score;
if (score < lowest)
lowest = score;
NumberFormat df = NumberFormat.getNumberInstance();
NumberFormat nf = NumberFormat.getNumberInstance();
df = new DecimalFormat("###.00");
countTextField.setText(nf.format(count));
averageTextField.setText(df.format(average));
bestTextField.setText(nf.format(best));
lowestTextField.setText(nf.format(lowest));
System.out.println(" " + nf.format(count) + ". " + score);
scoreTextField.selectAll();
}
else if (source == clearButton) {
if (count == 0)
lowest = 0;
NumberFormat df = NumberFormat.getNumberInstance();
df = new DecimalFormat("###.00");
System.out.println("\n Highest: " + best + " Lowest: " + lowest + " Average: " + df.format(average) + "\n");
System.out.println(" Scores were cleared...\n Next Set:");
count = 0;
total = 0;
average = 0;
best = 0;
lowest = 0;
scoreTextField.setText("");
countTextField.setText("");
averageTextField.setText("");
bestTextField.setText("");
lowestTextField.setText("");
}
}
}
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