import javax.swing.JOptionPane;

public class CheckPass {

	public static void main(String[] args) {

		String Password;
		boolean flag=false;

		while (flag==false) {
			Password = JOptionPane.showInputDialog(null, "1.A password must have at least eight characters.\n"
				+ "2.A password consists of only letters and digits.\n"
				+ "3. A password must contain at least two digits.\n\n"
				+ "Supposing you agree to the above Terms and Conditions, please enter your password: ","Terms and Conditions", -1);
			if (PassValidation(Password))
				break;
		}
		JOptionPane.showMessageDialog(null,"Your password is valid!","Correct.",2);
	}



	public static boolean PassValidation(String pass) {

		int numcount=0;

		for (int i=0; i<pass.length(); i++) {

			char ch = pass.charAt(i);

			if ( (ch>='a' && ch<='z') || (ch>='A' && ch<='Z') ) {

			}

			else if ( ch>='0' && ch<='9' )
				numcount++;

			else
				return false;
		}

		if ( (pass.length()>=8) && (numcount>=2) ) return true;
		else return false;

	}

}