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How to set Echo Char for JPasswordField in Java?
With echo char, you can set a character that would appear whenever a user will type the password in the JPasswordField.
Let us first create a new JPassword field −
JPasswordField passwd = new JPasswordField();
Now, use the setEchoChar() to set the echo char for password field. Here, we have asterisk (*) as the field for password −
passwd.setEchoChar('*');
The following is an example to set echo char for password field −
Example
package my; import java.awt.GridLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Register!"); JLabel label1, label2, label3; frame.setLayout(new GridLayout(2, 2)); label1 = new JLabel("Id", SwingConstants.CENTER); label2 = new JLabel("Age", SwingConstants.CENTER); label3 = new JLabel("Password", SwingConstants.CENTER); JTextField emailId = new JTextField(20); JTextField age = new JTextField(20); JPasswordField passwd = new JPasswordField(); passwd.setEchoChar('*'); frame.add(label1); frame.add(label2); frame.add(label3); frame.add(emailId); frame.add(age); frame.add(passwd); frame.setSize(550,250); frame.setVisible(true); } }
Output
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