码都正确才可以进入系统否则无法进入

public class ScannerTest(){
    public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      System.out.println("Please Enter Username:");
      String name = sc.nextLine();  
      System.out.println("Please Enter Password:");
      int passwd = sc.nextInt(); 
      if((name==your_user_name)&&(passwd==your_password)){
         System.out.println("Hello");
      }   
    }
  }

大概就是这样吧，把your_...换成你自己的东西应该就行