package GraphElements; public class UserNode { private String username; public UserNode(String username){ this.username = username; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public boolean equals(Object un){ if(un instanceof UserNode){ return username.equals(((UserNode)un).username); } return false; } public String toString(){ return username; } public int hashCode(){ return username.hashCode(); } }