How do I use Console class to read user input?
Category: java.io, viewed: 13751 time(s).
In the previous example we use the Scanner class to read user input. In this example we use another new class introduced in the JDK 1.6, the java.io.Console class.
package org.kodejava.example.io;
import java.io.Console;
import java.util.Arrays;
public class ConsoleDemo {
public static void main(String[] args) {
//
// Get a console object
//
Console console = System.console();
//
// Read username from the console
//
String username = console.readLine("Username: ");
//
// Read password, the password will not be echoed to the console screen
// and returned as an array of characters.
//
char[] password = console.readPassword("Password: ");
if (username.equals("admin") && String.valueOf(password).equals("secret")) {
console.printf("Welcome to Java Application %1$s.\n", username);
//
// Clear the password after validation successful
//
Arrays.fill(password, ' ');
} else {
console.printf("Invalid username or password.\n");
}
}
}
