1. Hanoi:

public  void move(int n,char a,char b,char c){  

    if(n==1){  
        System.out.println("move from "+a+" to "+c);  
    }else{  
        move(n-1, a,c,b);  
        move(1, a, b, c);  
        move(n-1, b, a, c);  
    }  
}  

1. Queue: