{"id":9570,"date":"2023-09-24T21:30:09","date_gmt":"2023-09-24T21:30:09","guid":{"rendered":"https:\/\/adelnasim.com\/docs\/courses\/object-oriented-programming-in-java\/classes-and-objects-9568\/questions-and-exercises\/"},"modified":"2024-04-07T01:19:58","modified_gmt":"2024-04-07T01:19:58","slug":"questions-and-exercises-9570","status":"publish","type":"docs","link":"https:\/\/adelnasim.com\/ar\/docs\/courses\/object-oriented-programming-in-java\/classes-and-objects\/questions-and-exercises-9570\/","title":{"rendered":"\u0623\u0633\u0626\u0644\u0629 \u0648\u062a\u0645\u0627\u0631\u064a\u0646"},"content":{"rendered":"<h2>\u0628\u0646\u0627\u0621 class \u0644\u0625\u064a\u062c\u0627\u062f \u0645\u0633\u0627\u062d\u0629 \u0648\u0645\u062d\u064a\u0637 \u0627\u0644\u062f\u0627\u0626\u0631\u0629<\/h2>\n<p><strong>Circle class:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">package com.mycompany.javaoop;\r\n\r\npublic class Circle {\r\n    private double radius;\r\n    private String color;\r\n    \r\n    public double getRadius() {\r\n        return radius;\r\n    }\r\n    \r\n    public void setRadius(double radius) {\r\n        this.radius = radius;\r\n    }\r\n    \r\n    public String getColor() {\r\n        return color;\r\n    }\r\n    \r\n    public void setColor(String color) {\r\n        this.color = color;\r\n    }\r\n    \r\n    public double getArea() {\r\n        return Math.PI * radius * radius;\r\n    }\r\n    \r\n    public double getCircumference() {\r\n        return Math.PI * 2 * radius;\r\n    }\r\n    \r\n    public String toString() {\r\n        return \"Circle{\" + \"radius=\" + radius + \", color=\" + color + \"}\";\r\n    }\r\n}<\/pre>\n<p>\u0635\u0641\u0627\u062a:<\/p>\n<ul>\n<li>radius: \u0633\u0645\u0629 \u0645\u0632\u062f\u0648\u062c\u0629 \u062e\u0627\u0635\u0629 \u0644\u062a\u062e\u0632\u064a\u0646 \u0646\u0635\u0641 \u0642\u0637\u0631 \u0627\u0644\u062f\u0627\u0626\u0631\u0629.<\/li>\n<li>color: \u0633\u0645\u0629 \u0633\u0644\u0633\u0644\u0629 \u062e\u0627\u0635\u0629 \u0644\u062a\u062e\u0632\u064a\u0646 \u0644\u0648\u0646 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 (\u0627\u062e\u062a\u064a\u0627\u0631\u064a\u060c \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0625\u0636\u0627\u0641\u064a\u0629).<\/li>\n<\/ul>\n<p>\u0627\u0644\u0637\u0631\u0642 Methods:<\/p>\n<p>\u2013 Getters \u0648Setters:<\/p>\n<ul>\n<li>getRadius (): \u0625\u0631\u062c\u0627\u0639 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u062d\u0627\u0644\u064a\u0629 \u0644\u0633\u0645\u0629 \u0646\u0635\u0641 \u0627\u0644\u0642\u0637\u0631.<\/li>\n<li>setRadius(double radius): \u064a\u0636\u0628\u0637 \u0642\u064a\u0645\u0629 \u0633\u0645\u0629 radius\u060c \u0631\u0628\u0645\u0627 \u0645\u0639 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0635\u062d\u0629 (\u063a\u064a\u0631 \u0645\u062a\u0636\u0645\u0646\u0629 \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u0645\u062b\u0627\u0644).<\/li>\n<li>getColor(): \u0625\u0631\u062c\u0627\u0639 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u062d\u0627\u0644\u064a\u0629 \u0644\u0633\u0645\u0629 \u0627\u0644\u0644\u0648\u0646 (\u0625\u0646 \u0648\u062c\u062f\u062a).<\/li>\n<li>setColor(String color): \u064a\u0636\u0628\u0637 \u0642\u064a\u0645\u0629 \u0633\u0645\u0629 \u0627\u0644\u0644\u0648\u0646 (\u0625\u0646 \u0648\u062c\u062f\u062a).<\/li>\n<\/ul>\n<p>- \u0627\u0644\u0645\u0633\u0627\u062d\u0629 \u0648\u0627\u0644\u0645\u062d\u064a\u0637:<\/p>\n<ul>\n<li>getArea(): \u062d\u0633\u0627\u0628 \u0648\u0625\u0631\u062c\u0627\u0639 \u0645\u0633\u0627\u062d\u0629 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 Math.PI * radius * radius.<\/li>\n<li>getCircumference(): \u062d\u0633\u0627\u0628 \u0648\u0625\u0631\u062c\u0627\u0639 \u0645\u062d\u064a\u0637 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 Math.PI * 2 * radius.<\/li>\n<li>toString(): \u064a\u062a\u062c\u0627\u0648\u0632 \u0623\u0633\u0644\u0648\u0628 toString() \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u064a \u0644\u062a\u0648\u0641\u064a\u0631 \u062a\u0645\u062b\u064a\u0644 \u0623\u0643\u062b\u0631 \u0648\u0635\u0641\u064b\u0627 \u0644\u0643\u0627\u0626\u0646 \u0627\u0644\u062f\u0627\u0626\u0631\u0629\u060c \u0628\u0645\u0627 \u0641\u064a \u0630\u0644\u0643 \u0646\u0635\u0641 \u0627\u0644\u0642\u0637\u0631 \u0648\u0627\u0644\u0644\u0648\u0646 (\u0625\u0646 \u0648\u062c\u062f).<\/li>\n<\/ul>\n<p><strong>Main Class:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">package com.mycompany.javaoop;\r\n\r\npublic class Main\r\n{\r\n    public static void main(String args[]) {\r\n        Circle c1 = new Circle(), c2 = new Circle();\r\n        c1.setRadius(3.0);\r\n        c1.setColor(\"Black\");\r\n        System.out.println(\"c1 area = \" + c1.getArea());\r\n        System.out.println(c1.toString());\r\n        \r\n        c2.setRadius(2.0);\r\n        c2.setColor(\"Blaue\");\r\n        System.out.println(\"c2 Circumference = \" + c2.getCircumference());\r\n    }\r\n}\r\n<\/pre>\n<ul>\n<li>\u064a\u0646\u0634\u0626 \u0643\u0627\u0626\u0646\u064a\u0646: c1 \u0648c2.<\/li>\n<li>\u064a\u0636\u0628\u0637 \u0646\u0635\u0641 \u0627\u0644\u0642\u0637\u0631 \u0648\u0627\u0644\u0644\u0648\u0646 (\u0625\u0646 \u0623\u0645\u0643\u0646) \u0644\u0643\u0644 \u0643\u0627\u0626\u0646.<\/li>\n<li>\u062d\u0633\u0627\u0628 \u0648\u0637\u0628\u0627\u0639\u0629 \u0645\u0633\u0627\u062d\u0629 c1 \u0648\u0645\u062d\u064a\u0637 c2.<\/li>\n<li>\u0627\u062e\u062a\u064a\u0627\u0631\u064a\u064b\u0627\u060c \u064a\u0645\u0643\u0646\u0643 \u0627\u0633\u062a\u062f\u0639\u0627\u0621 c1.toString() \u0648c2.toString() \u0644\u0637\u0628\u0627\u0639\u0629 \u062a\u0645\u062b\u064a\u0644\u0627\u062a\u0647\u0645 \u0627\u0644\u0643\u0627\u0645\u0644\u0629.<\/li>\n<\/ul>\n<h2>\u0628\u0646\u0627\u0621 \u0646\u0638\u0627\u0645 \u0628\u0646\u0643\u064a \u0628\u0633\u064a\u0637<\/h2>\n<p>Account class:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">package com.mycompany.javaoop;\r\n\r\npublic class Account {\r\n    private int accountNo;\r\n    private String name;\r\n    private float amount;\r\n    \r\n    public void insert(int a, String n, float amt) {\r\n        this.accountNo = a;\r\n        this.name = n;\r\n        this.amount = amt;\r\n    }\r\n    \r\n    public void deposit(float amt) {\r\n        this.amount = this.amount + amt;\r\n        System.out.println(amt + \"deposited\");\r\n    }\r\n    \r\n    public void withdraw(float amt) {\r\n        if(amount &lt; amt) {\r\n            System.out.println(\"Insufficient Balance\")\r\n        } else {\r\n            this.amount = this.amount - amt;\r\n            System.out.println(amt + \"withdrawn\");\r\n        }\r\n    }\r\n    \r\n    public void checkBalance() {\r\n        System.out.println(\"Balance = \" + this.amount);\r\n    }\r\n    \r\n    public String toString() {\r\n        return \"Account{\" + \"accountNo=\" + accountNo + \", name =\" + name + \", amount=\" + amount; \r\n    }\r\n}package com.mycompany.javaoop;\r\n\r\npublic class Account {\r\n    private int accountNo;\r\n    private String name;\r\n    private float amount;\r\n    \r\n    public void insert(int a, String n, float amt) {\r\n        this.accountNo = a;\r\n        this.name = n;\r\n        this.amount = amt;\r\n    }\r\n    \r\n    public void deposit(float amt) {\r\n        this.amount = this.amount + amt;\r\n        System.out.println(amt + \"deposited\");\r\n    }\r\n    \r\n    public void withdraw(float amt) {\r\n        if(amount &lt; amt) {\r\n            System.out.println(\"Insufficient Balance\")\r\n        } else {\r\n            this.amount = this.amount - amt;\r\n            System.out.println(amt + \"withdrawn\");\r\n        }\r\n    }\r\n    \r\n    public void checkBalance() {\r\n        System.out.println(\"Balance = \" + this.amount);\r\n    }\r\n    \r\n    public String toString() {\r\n        return \"Account{\" + \"accountNo=\" + accountNo + \", name =\" + name + \", amount=\" + amount; \r\n    }\r\n}<\/pre>\n<p>\u0635\u0641\u0627\u062a:<\/p>\n<ul>\n<li>accountNo: \u0647\u0648 Private int \u064a\u0642\u0648\u0645 \u0628\u062a\u062e\u0632\u064a\u0646 \u0631\u0642\u0645 \u0627\u0644\u062d\u0633\u0627\u0628.<\/li>\n<li>name: \u062a\u0642\u0648\u0645 \u0627\u0644\u0640String \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u062a\u062e\u0632\u064a\u0646 \u0627\u0633\u0645 \u0635\u0627\u062d\u0628 \u0627\u0644\u062d\u0633\u0627\u0628.<\/li>\n<li>amount: \u064a\u062e\u0632\u0646 \u0642\u064a\u0645\u0629 \u0639\u0634\u0631\u064a\u0629 \u062e\u0627\u0635\u0629 \u0628\u0631\u0635\u064a\u062f \u0627\u0644\u062d\u0633\u0627\u0628.<\/li>\n<\/ul>\n<p>\u0627\u0644\u0637\u0631\u0642 Methods:<\/p>\n<ul>\n<li>insert(int a, String n, float amt):<br \/>\n\u062a\u0647\u064a\u0626\u0629 \u0627\u0644\u062d\u0633\u0627\u0628 \u0628\u0631\u0642\u0645 \u0627\u0644\u062d\u0633\u0627\u0628 \u0648\u0627\u0644\u0627\u0633\u0645 \u0648\u0627\u0644\u0645\u0628\u0644\u063a \u0627\u0644\u0623\u0648\u0644\u064a \u0627\u0644\u0645\u0642\u062f\u0645.<\/li>\n<li>deposit(float amt):<br \/>\n\u0625\u064a\u062f\u0627\u0639 \u0627\u0644\u0645\u0628\u0644\u063a \u0627\u0644\u0645\u062d\u062f\u062f \u0641\u064a \u0627\u0644\u062d\u0633\u0627\u0628.<br \/>\n\u0637\u0628\u0627\u0639\u0629 \u0631\u0633\u0627\u0644\u0629 \u062a\u0623\u0643\u064a\u062f \u0628\u0627\u0644\u0645\u0628\u0644\u063a \u0627\u0644\u0645\u0648\u062f\u0639.<\/li>\n<li>withdraw(float amt):<br \/>\n\u064a\u0633\u062d\u0628 \u0627\u0644\u0645\u0628\u0644\u063a \u0627\u0644\u0645\u062d\u062f\u062f \u0645\u0646 \u0627\u0644\u062d\u0633\u0627\u0628\u060c \u0648\u0644\u0643\u0646 \u0641\u0642\u0637 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0647\u0646\u0627\u0643 \u0631\u0635\u064a\u062f \u0643\u0627\u0641.<br \/>\n\u0637\u0628\u0627\u0639\u0629 \u0631\u0633\u0627\u0644\u0629 \u062a\u0623\u0643\u064a\u062f \u0641\u064a \u062d\u0627\u0644\u0629 \u0627\u0644\u0646\u062c\u0627\u062d\u060c \u0623\u0648 \u0631\u0633\u0627\u0644\u0629 \"Insufficient Balance\" \u0641\u064a \u062d\u0627\u0644\u0629 \u062e\u0644\u0627\u0641 \u0630\u0644\u0643.<\/li>\n<li>checkBalance():<br \/>\n\u064a\u0639\u0631\u0636 \u0631\u0635\u064a\u062f \u0627\u0644\u062d\u0633\u0627\u0628 \u0627\u0644\u062c\u0627\u0631\u064a.<\/li>\n<li>toString():<br \/>\n\u064a\u062a\u062c\u0627\u0648\u0632 \u0627\u0644\u0623\u0633\u0644\u0648\u0628 toString() \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u064a \u0644\u062a\u0648\u0641\u064a\u0631 \u062a\u0645\u062b\u064a\u0644 \u0633\u0644\u0633\u0644\u0629 \u0645\u062e\u0635\u0635 \u0644\u0644\u062d\u0633\u0627\u0628\u060c \u0628\u0645\u0627 \u0641\u064a \u0630\u0644\u0643 \u0631\u0642\u0645 \u0627\u0644\u062d\u0633\u0627\u0628 \u0648\u0627\u0644\u0627\u0633\u0645 \u0648\u0627\u0644\u0631\u0635\u064a\u062f.<\/li>\n<\/ul>\n<p>\u0623\u0643\u0645\u0644 \u0627\u0644\u0622\u0646 \u0647\u0630\u0627 \u0627\u0644\u0643\u0648\u062f \u0643\u062a\u0645\u0631\u064a\u0646 \u0639\u0646 \u0637\u0631\u064a\u0642 \u0625\u0646\u0634\u0627\u0621 \u0627\u0644\u0640instances \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629. \u0644\u0645\u0632\u064a\u062f \u0645\u0646 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u064a\u0631\u062c\u0649 \u0645\u0634\u0627\u0647\u062f\u0629 \u0647\u0630\u0627 \u0627\u0644\u0641\u064a\u062f\u064a\u0648: <a href=\"https:\/\/youtu.be\/7iMtBSktIKw?si=NAAtJvDnNjZRSXjm\">Questions and Exercises &#8211; Classes and Objects<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Build a class to find the area and circumference of a circle Circle class: package com.mycompany.javaoop; public class Circle { private double radius; private String color; public double getRadius() { return radius; } public void setRadius(double radius) { this.radius = radius; } public String getColor() { return color; } public void setColor(String color) { this.color [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":9568,"menu_order":7,"comment_status":"open","ping_status":"closed","template":"","doc_tag":[],"class_list":["post-9570","docs","type-docs","status-publish","hentry","no-post-thumbnail"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/docs\/9570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/comments?post=9570"}],"version-history":[{"count":5,"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/docs\/9570\/revisions"}],"predecessor-version":[{"id":10625,"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/docs\/9570\/revisions\/10625"}],"up":[{"embeddable":true,"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/docs\/9568"}],"wp:attachment":[{"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/media?parent=9570"}],"wp:term":[{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/adelnasim.com\/ar\/wp-json\/wp\/v2\/doc_tag?post=9570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}