User.java

public abstract class User {
    private String ID;
    private String name;
    private String username;
    private String password;
    private String phonenumber;
    
    public User (){
        
    }
     public User(String username,String password,String ID, String name, String phonenumber) {
        this.ID = ID;
        this.name = name;
        this.password = password;
        this.username = username;
        this.phonenumber=phonenumber;
    }
    public String getID() {
        return ID;
    }
    public void setID(String ID) {
        this.ID = ID;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getPhonenumber() {
        return phonenumber;
    }
    public void setPhonenumber(String phonenumber) {
        this.phonenumber = phonenumber;
    }
        public abstract void displayinfo();

}