java looping problem?

[Phonedog911]

whenever i try to do a loop in java, it does this wierd thing where it repeats the printed lines multiple times. this is a problem for me because everytime my instructor asks us to make a program that uses a loop(most every program we make now) he sees this and says it's a probem. i asked him how to fix it but he either doesnt know or expects us to figure it out on our own(everybody else is having the same problem). here's an example:

import java.io.*;
class password {
	public static void main (String args[])
	throws java.io.IOException {
		
		char input, passwd='y';
		
		do {
		System.out.print("Enter your password: ");
		input=(char)System.in.read();
	    if(input!=passwd) System.out.print("wrong password");
		}
		while(input!=passwd);
		
	System.out.println("you got it");
	}
	}

will output this if you enter the wrong password

wrong passwordEnter your password: wrong passwordEnter your password: wrong passwordEnter your password:

and then the user can input another letter

what it should do is just say "wrong password" and then wait for input again... anybody know what the problem is?