java - Add subclass objects to an ArrayList -

-

I have been a month in my BSc in software, and we are working on this forest project where we have different types There are trees (ash and bee) which grow at different speeds, they are sub-squares of normal class trees.

My problem is now that I have been asked to add two trees of any kind of tree (ash and beech) to an array list. Their int age and double height should all be different

Public Square Tree {Public Interval Age; Public double height; Public Zero Growth One Year () {age ++; } Public Zero Show () {System.out.println ("trÃÆ'à ¢ â,¬Å¡Ãƒâ € šÃ, ° + + + +" + "+ "M +" meter "); Public class ash tree (public ash) {extended} {

ash for the source age = 1; height = 1.0;} one year for public zeros () {super.growOneYear (); if (height <15) {height = height * 1.20;}} public zeros show () {System .out.println ("Ask:"); super.show ();}}

Keeping in mind that you already have extended tree class manifesto with bclassing tree , at this point you need to store all the trees and sub classes in the tree List s's trees s basically make lists, and add trees to the list. Public category one {Private list> Lieutenant; Tree> tree; public forest (tree) {tree = new arreelist & lt; & Gt; (); // Diamond syntax Java7, Arreist & Lt; Tree & gt; (6) public zeros addTree (tree tree) on java {tree. Tree (tree); } Public Zero Grows (Bridges) (tree tree: tree) {tree. Tree } // You can tree. Stream (). ForEach (x - & gt; x.growOneYear ()); 8) Public Zero Shows on Java () (for (tree tree: tree) {tree.show ();}}} Public square main square {public static zero main (string [] args) {forest one = new Forest (); ash ashishi = new ash (); middle beetry = new bech (); forest.addTree (ashTree); forest.addTree; forest.show (); forest.growTreesByOneYear (); forest.show ( );

I hope that helps!

Oh, and for the trees - you can probably provide age and height in a constructor parameter, and Can make them something Asha Ash = new ash (5, 1.5); // age, height

that 

 
 Code> public squares will use ash {public ash (interval age, double height) {this.age = age; This.height = height}}}   
 Or honestly, By the way it is clear:  
  public square tree {public tree (int age, double height) {this.age = age; this.height = height}}} public square ash tree (public ash (Int age, double height) {super (age, height) is extensively; }}

Comments

Post a Comment

Popular posts from this blog

php - PDO bindParam() fatal error -

-
I am trying to learn PDO, now I have written this small code, but it gives me a serious error: < P> Fatal error: Call a member function at a non-object dot () ... $ con = new mysqli ("127.0.0.1", "root", "", "csvdangercheck"); $ Query = $ con- & gt; ("Id,` var1`, `var2`) values ​​(" id,: var1,: var2) ";); $ query- & gt; bypass pattern (': id', $ id); $ query- & gt; BindParam (': var1', $ VAL1); $ Query- & gt; bindParam (': var2', $ val2); $ Query-> Executed (); I Trying to use print_r ($ con-> errorInfo ()) but Fatal error: Undefined method mysqli :: errorInfo ( ) ... can someone tell me what am I missing? Flaffeh said, you have PDO Missing Mysqy, try it: $ con = new PDO ('mysql: host = 127.0.0.1; dbname = csvdangercheck', 'root', '');
Read more

logging - How can I log both the Request.InputStream and Response.OutputStream traffic in my ASP.NET MVC3 Application for specific Actions? -

-
For a specific set of tasks, I need to log in to the incoming request inputstream as well as outgoing response. is. I am using an ActionFilterAttribute for this and overriding the OnActionExecuted and OnResultExecuted methods. So I'm starting with this idea ... Public category ActionLoggerAttribute: ActionFilterArrbit {Public Override Zero On-Offed Execution (ActionActioned Contact Filter Filter) {base.OnActionAxecuted (FilterContext); HttpRequestBase request = filterContext.HttpContext.Request; // TODO: Log the request. InputStream} Public Override Zero OnResultExecuted (ResultExecutedContext FilterContext) {base.OnResultExecuted (filterContext); HTTPRPSPointBase Response = FilterContacts Hpptex response; // TODO: Log on Response.OutputStream}} Ideally I'll hook it up with enterprise library logging because I'm already using it for error logging. Am I reaching the input and output stream at the right time? Can I easily use the Enterprise Library to log i
Read more

java - Why my included JSP file won't get processed correctly? -

-
I am trying to create Java web framework (and learning), and on the basis of 'Code Generator In the process of making the material view of the database in the process of development, I stumbled into a difficulty, which I do not know how to solve it. First of all, I want the following index.jsp : & lt; Body & gt; Use all pages to be created. & Lt;% @ include file = "header.jsp"% & gt; & Lt; Hours / & gt; & Lt;% @ included file = "body.jsp"%> & Lt; Hours / & gt; & Lt;% @ include file = "footer.jsp"% & gt; & Lt; / Body & gt; And, in body.jsp , I should have it like this: & lt; Jsp: include page = "$ {Application_modul}"%> Where application_modul is an attribute defined in its controller: request.setAttribute ("application_modul", "USER_ACCOUNT \\ ' View_user_account.jsp "); This file can be found properly, but the processed JSP does
Read more