statement in ELSE is getting printed multiple times, i want it to print it only once when IF is wrong

here i am comparing array elements of array user id and password. i want else statement to get printed only once when IF condition is wrong. can i take any other variable for it?. or suggest if i can use break statement anywhere.

      public static void main(String args[])
       {
        lib1 o=new lib1();
        Scanner in=new Scanner(System.in);
        Scanner sc=new Scanner(System.in);
        int u[]={51,52,53,54,55};
        int p[]={1,2,3,4,5};
        int d=0;
        System.out.println("enter username and password");
        int un=in.nextInt();
        int pw=in.nextInt();

        for(int i=0,j=0;i<5 && j<5;i++,j++)
        {
            if(un==u[i] && pw==p[j])
            {
                while(d==0)
                {
                    System.out.println("enter subject name");
                    String c=sc.nextLine(); 
                    if(c.equals("java"))
                    o.java();
                    else if(c.equals("exit"))
                    {
                        d++;
                    }
                }
            }

            else
            {   
                System.out.println("invalid password"); 
            }   
        }
    }