查找两个有序链表的相同部分

/**
* Created by 糖糖 on 2017/8/2.
*/
public class printCommonPart {
public static void printCommonPart(node head1,node head2){
while (head1!= null && head2!= null){
if(head1.data>head2.data)
head2 = head2.next;
else if(head1.data<head2.data)
head1 = head1.next;
else {
System.out.print(head1.data+" ");
head1 = head1.next;
head2 = head2.next;
}
}
}
public static  void  main(String args[]){
node n1=new node(2);
node n2=new node(5);
node n3=new node(6);
node n4=new node(7);
n1.next=n2;
n2.next=n3;
n3.next=n4;
node n5=new node(5);
node n6=new node(6);
node n7=new node(7);
n5.next=n6;
n6.next=n7;
printCommonPart(n1,n5);
}
}
class node{
public int data;
public  node next;
public node(int data){
this.data = data;
}
}