How to clear only one value from text field in one press on button in java swing?

Question

I want to clear only one value per press from text field

public void actionPerformed(ActionEvent e){

       String s= textfield.getText();
       textfield.setText(s[s.length()-1]);

Answer 1

Don't replace the entire string each time.

Instead you can update the Document directly to only remove the last character:

try
{
    Document doc = textField.getDocument();
    doc.remove(doc.getLength() - 1, 1);
}
catch(BadLocationException ble) { ble.getStackTrace(); }