How to use

setMaximumSize

method

in

javax.swing.JPasswordField

adminPassword.setMaximumSize(null);
adminPassword.setMinimumSize(null);
adminPassword.setPreferredSize(null);

getContentPane().add(jLabel_password1, gridBagConstraints);
jPasswordField1.setMaximumSize(new java.awt.Dimension(200, 30));
jPasswordField1.setMinimumSize(new java.awt.Dimension(100, 10));
jPasswordField1.setName(""); // NOI18N
getContentPane().add(jLabel_password2, gridBagConstraints);
jPasswordField2.setMaximumSize(new java.awt.Dimension(200, 30));
jPasswordField2.setMinimumSize(new java.awt.Dimension(100, 10));
jPasswordField2.setName(""); // NOI18N

questionPanel.add(imageLabel);
passwordField.setMaximumSize(passwordField.getPreferredSize());
passwordField.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {

questionPanel.add(imageLabel);
passwordField.setMaximumSize(passwordField.getPreferredSize());
passwordField.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
credentialPanel.add(passwordLabel);
passwordField.setMaximumSize(passwordField.getPreferredSize());
credentialPanel.add(passwordField);