JDK6-java.io.Console用户密码验证例子

import java.io.Console;   
import java.util.Arrays;   
  
public class PasswordPromptingDemo {   
  
  public static void main(String[] args) {   
    Console console = System.console();   
  
    if (console == null) {   
      System.out.println("Console is not available");   
      System.exit(1);   
    }   
  
    char[] password = "mustang".toCharArray();   
  
    char[] passwordEntered = console.readPassword("Enter password: ");   
  
    if (Arrays.equals(password, passwordEntered)) {   
      System.out.println("\n Access granted \n");   
      Arrays.fill(password, ' ');   
      Arrays.fill(passwordEntered, ' ');   
      System.out.println("OK ...");   
    } else {   
      System.out.println("Access denied");   
      System.exit(1);   
    }   
  }   
}