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POunable to use the methods of one java class into the second class using a package
 

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  1. POunable to use the methods of one java class into the second class using a package
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    <p>Actually, my task is to make java bean classes inside a same package and use them into JSP (java server pages).</p> <p>Below is what i am doing.</p> <p><strong>Package name: mypack</strong> *<em>1st class name: UserBean.java</em>* (contains all getters and setters methods) <strong>2nd class name: Databean.java</strong> (contains the methods to interact with database)<br /> <strong>d:\java:</strong> jdk1.5 and tomcat, both are in this folder.</p> <p><strong>UserBean.java:</strong> I want to use the setter and getter methods of this class to set and get the values. <strong>DataBean.java:</strong> I want to use this class's methods to interact with MS Access database like fetch, update, delete etc. For these actions, i want to instantiate UserBean class object into DataBean Class to set and get the values of DataBean class. </p> <p>How i am compiling?</p> <p><strong>d:\java\mypack> set path=d:\java\jdk1.5\bin</strong><br /> <strong>d:\java\mypack>javac UserBean.java</strong></p> <p>But when i instantiate UserBean class's object inside the DataBean Class, i get the error that i have already mentioned.</p> <p><strong>d:\java\mypack>javac DataBean.java</strong><br /> here i get that above error message</p> <p>to resolve this issue, i modified the compiling line a little bit:</p> <p><strong>d:\java\mypack>javac -classpath .. DataBean.java</strong><br /> this works and successfully generates the class file</p> <p>For now, both classes are being compiled successfully. There is another issue now and is described below.</p> <pre><code>package mypack; **//UserBean.java** public class UserBean{ String username; //an attribute of UserBean Class String password; //an attribute of UserBean Class public UserBean(){} //Default Constructor of UserBean Class public void setUsername(String username){ this.username = username; }//setter method public String getUsername(){return username; } //getter method } package mypack; **//DataBean.java** public class DataBean{ UserBean user = new UserBean(); //Instantiating UserBean class object in //DataBean class String username; //an attribute of DataBean Class public DataBean(){} //Default Constructor of UserBean Class public String getUsernameTwo(){return user.getUsername(); } //gettter method } </code></pre> <p>On jsp page, i instantiated two objects </p> <pre><code>&lt;%@ page import="java.sql.*, mypack.*"%&gt; //importing packages &lt;html&gt; &lt;body&gt; &lt;% UserBean u = new UserBean(); *//UserBean class object u has been instantiated* DataBean d = new DataBean(); //DataBean class object d has been instantiated u.setUsername("John"); //username has been set as john out.println(u.getUsername()); //gets the string john, and prints it successfully (prints: John) out.println(d.getUsernameTwo()); //Does'nt print John, but prints null //**(it should print john too but it doesnt)** %&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. USZack Macomber
    1. USSid Chaudhry
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    1. COCould you please clarify the question/questions?
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      1. USiikkoo
    2. CO**@Mikael Hallne** I've two classes. **UserBean.java & DataBean.java**. It should work the way, i mean, if i set a value in **UserBean class**, i should be able to get that particular value in **DataBean class** by instantiating **UserBean Class object** inside **DataBean Clas**. I should be able to use all the methods of **UserBean Class from DataBean class**. Both of my classes are in the same packcage. I'm doing this to make it work with JSP.
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      1. USSid Chaudhry
 

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