Empty String validation for Multiple JTextfield

Question

Is there a way to validate a number of JTextfields in java without the if else structure. I have a set of 13 fields, i want an error message when no entry is given for any o

Answer 1

Take an array of these three JTextField, I am giving an overview

JTextField[] fields = new JTextField[13] 
field[0] = firstname;
field[1] = lastname; //then add remaining textfields

for(int i = 0; i < fields.size(); ++i) {
if(fields[i].getText().isEmpty())
   JOptionPane.showMessageDialog(null, "No data entered");
}

Correct me if i'm wrong, I am not familiar with Swing or awt.HTH :)