How to use

getEchoChar

method

in

javax.swing.JPasswordField

/**
 * Get echo character.
 *
 * @return Echo character
 */
public char getEchoChar() {
  return jpfPassword.getEchoChar();
}

JPasswordField jpf = new JPasswordField();
jpf.getEchoChar();

private void showPasswordCheckBoxItemStateChanged(java.awt.event.ItemEvent evt) {//GEN-FIRST:event_showPasswordCheckBoxItemStateChanged
  if (showPasswordCheckBox.isSelected()) {
    passwordPasswordField.setEchoChar((char) 0);
  } else {
    passwordPasswordField.setEchoChar(reference.getEchoChar());
  }
}//GEN-LAST:event_showPasswordCheckBoxItemStateChanged

private void showButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_showButtonActionPerformed
  if (!passwordVisible) {
    passwordVisible = true;
    originalFont = passwordField.getFont();
    passwordField.setFont(usernameTextField.getFont());
    originalEchoChar = passwordField.getEchoChar();
    passwordField.setEchoChar((char) 0);
    Mnemonics.setLocalizedText(showButton, NbBundle.getMessage(CustomizerGeneral.class, "LBL_ShowButtonHide"));
    showButton.setToolTipText(NbBundle.getMessage(CustomizerGeneral.class, "LBL_ShowButtonHide_ToolTip"));
  } else {
    passwordVisible = false;
    passwordField.setFont(originalFont);
    passwordField.setEchoChar(originalEchoChar);
    Mnemonics.setLocalizedText(showButton, NbBundle.getMessage(CustomizerGeneral.class, "CustomizerGeneral.showButton.text"));
    showButton.setToolTipText(NbBundle.getMessage(CustomizerGeneral.class, "CustomizerGeneral.showButton.toolTipText"));
    
  }
}//GEN-LAST:event_showButtonActionPerformed

this.ORIGINAL_ECHO = this.passwordField.getEchoChar();
this.fieldPanel.add(this.passwordField);

if (0 != pwf.getEchoChar()) {
  echoChar = pwf.getEchoChar();

public Shape modelToView( int pos, Shape a, Position.Bias b) throws BadLocationException {
  Container c = getContainer();
  if ( c instanceof JPasswordField ) {
   JPasswordField f = (JPasswordField)c;
   if ( !f.echoCharIsSet() ) {
     return super.modelToView( pos, a, b);
   }
    
  char echoChar = f.getEchoChar();
   int w = f.getFontMetrics( f.getFont()).charWidth( echoChar);
   w = ( w < ancho ? ancho : w) + hueco;
   
   Rectangle alloc = adjustAllocation( a).getBounds();
   int dx = (pos - getStartOffset()) * w;
   alloc.x += dx - 2;
  if ( alloc.x <= 5 ) {
   alloc.x = 6;
  }
   alloc.width = 1;
   
   return alloc;
  }
  
  return null;
}
 

final JLabel	lbpass	= new JLabel("Password");
tfpass    = new JPasswordField(10);
final char	echo	= tfpass.getEchoChar();
final JButton	buapply	= new JButton("Apply");
cbshowchars    = new JCheckBox("Show characters");

final JLabel	lbpass	= new JLabel("Password");
tfpass    = new JPasswordField(10);
final char	echo	= tfpass.getEchoChar();
final JButton	buapply	= new JButton("Apply");
cbshowchars    = new JCheckBox("Show characters");

@Override
protected int drawSelectedText(Graphics g, final int x, final int y,
    int p0, int p1) throws BadLocationException {
  Container c = getContainer();
  if (c instanceof JPasswordField) {
    JPasswordField f = (JPasswordField) c;
    if (!f.echoCharIsSet()) {
      return super.drawSelectedText(g, x, y, p0, p1);
    }
    int n = p1 - p0;
    char echoChar = f.getEchoChar();
    int currPos = x;
    for (int i = 0; i < n; i++) {
      currPos = drawEchoCharacter(g, currPos, y, echoChar, true);
    }
    return x + n * getEchoCharAdvance();
  }
  return x;
}

@Override
protected int drawUnselectedText(Graphics g, final int x, final int y,
    int p0, int p1) throws BadLocationException {
  Container c = getContainer();
  if (c instanceof JPasswordField) {
    JPasswordField f = (JPasswordField) c;
    if (!f.echoCharIsSet()) {
      return super.drawUnselectedText(g, x, y, p0, p1);
    }
    int n = p1 - p0;
    char echoChar = f.getEchoChar();
    int currPos = x;
    for (int i = 0; i < n; i++) {
      currPos = drawEchoCharacter(g, currPos, y, echoChar, false);
    }
    return x + n * getEchoCharAdvance();
  }
  return x;
}

 public int viewToModel( float fx, float fy, Shape a, Position.Bias[] bias) {
   bias[0] = Position.Bias.Forward;
   int n = 0;
   Container c = getContainer();
   if ( c instanceof JPasswordField ) {
    JPasswordField f = (JPasswordField)c;
    if ( !f.echoCharIsSet() ) {
      return super.viewToModel( fx, fy, a, bias);
    }
    
    char echoChar = f.getEchoChar();
    int w = f.getFontMetrics( f.getFont()).charWidth( echoChar);
    w = ( w < ancho ? ancho : w) + hueco;
    
    a = adjustAllocation( a);
    Rectangle alloc = (a instanceof Rectangle) ? (Rectangle)a : a.getBounds();
    n = ((int)fx - alloc.x) / w;
    if (n < 0) {
      n = 0;
    }
    else if ( n > (getStartOffset() + getDocument().getLength()) ) {
      n = getDocument().getLength() - getStartOffset();
    }
   }
   
  return getStartOffset() + n;
 }
}

@Override
protected int drawUnselectedText(Graphics g, final int x, final int y,
    int p0, int p1) throws BadLocationException {
  Container c = getContainer();
  if (c instanceof JPasswordField) {
    JPasswordField f = (JPasswordField) c;
    if (!f.echoCharIsSet()) {
      return super.drawUnselectedText(g, x, y, p0, p1);
    }
    int n = p1 - p0;
    char echoChar = f.getEchoChar();
    int currPos = x;
    for (int i = 0; i < n; i++) {
      currPos = drawEchoCharacter(g, currPos, y, echoChar, false);
    }
    return x + n * getEchoCharAdvance();
  }
  return x;
}

@Override
protected int drawSelectedText(Graphics g, final int x, final int y,
    int p0, int p1) throws BadLocationException {
  Container c = getContainer();
  if (c instanceof JPasswordField) {
    JPasswordField f = (JPasswordField) c;
    if (!f.echoCharIsSet()) {
      return super.drawSelectedText(g, x, y, p0, p1);
    }
    int n = p1 - p0;
    char echoChar = f.getEchoChar();
    int currPos = x;
    for (int i = 0; i < n; i++) {
      currPos = drawEchoCharacter(g, currPos, y, echoChar, true);
    }
    return x + n * getEchoCharAdvance();
  }
  return x;
}