Latest Tutorials| Questions and Answers|Ask Questions?|Site Map



Home Answers Viewqa Java-Beginners how to pass a string from one class to another

Have Programming Question? Ask it here!
 
 
 


Deepika
how to pass a string from one class to another
4 Answer(s)      a year and 11 months ago
Posted in : Java Beginners


hi all, Good morning. I am trying to develop a coding pass a string from one class and declare in other class. the string which i need to pass is the data from an file and i want to move it to the main method. i am trying to find a solution for this. Thank's in Advance... :)

this is the code.

import java.io.*; 
class Class1 {                       //Class1
public Class1(String name){
try{
   // private String name = "Class1";
FileInputStream fstream = new FileInputStream("1.txt");
  // Get the object of DataInputStream
  DataInputStream in = new DataInputStream(fstream);
  BufferedReader br = new BufferedReader(new InputStreamReader(in));

    //private String name;// = "Dot saw I was Tod";
  //  private int IdNo = 20;

while ((name = br.readLine()) != null)   {
  // Print the content on the console
  System.out.println (name);
  }in.close();
}catch (Exception e){//Catch exception if any
            System.err.println("Error: " + e.getMessage());
        }
}
}
public class Class2 {   
    public static void main(String[] args) {
        Class1 class1 = new Class1(); // Creating object of Class1
        String name = "Class2";
        System.out.println("Welcome in " + name);
 System.out.println (name);
//        System.out.println("Another Class variables value:" + class1.getIdNo()+ " and " + class1.getName());
//           class1.class1Method();
    }
}
// i want to display the output of 1.txt in the Class2

input is 1.txt

001 Apple
001 mango
002 Pappaya
003 orange
004 gauva
006 stawbery

i am getting an error in this line: Class2.java:75: cannot find symbol symbol : constructor Class1() location: class Class1 Class1 class1 = new Class1(); // Creating object of Class1 ^ 1 error

am i in the correct flow? if i am wrong. correct it.


Advertisement
View Answers

August 28, 2012 at 3:43 PM


Here is a simple example that passes string from one class to another.

import java.util.*;
 class A{
    static String st;
    public static String get() {
    Scanner input=new Scanner(System.in);
    System.out.print("Enter String:");
    String str=input.nextLine();
    st=str;
    return st;
    }
    }

 public class PassString {
     public static void main(String[]args){
     String b=A.get();
     System.out.println("Get String from class A: "+b);
     }
}


August 28, 2012 at 3:50 PM


Here is another example of passing string from one class to another.

import java.io.*;

class Class1 { 
    public static String get() {
        String data = ""; 
        try{ 

         String name="";
         FileInputStream fstream = new FileInputStream("1.txt"); 
         DataInputStream in = new DataInputStream(fstream);
         BufferedReader br = new BufferedReader(new InputStreamReader(in));
      while ((name = br.readLine()) != null) { 
     data+=name+"\n";
     }

     in.close(); 
     }catch (Exception e){
         System.err.println("Error: " + e.getMessage()); 
         }
         return data;
         }
         }
         public class Class2 {
    public static void main(String[] args) {
    Class1 class1 = new Class1(); 
     String data =class1.get();
     System.out.println("Data of class1: " + data);
  }
}


August 28, 2012 at 4:32 PM


hi,Thank's a lot.. in deed this was a great help.. for my stuck up for past few day's... thank you.. this will really help all.. you have done a great job... :) thank's :)



August 30, 2012 at 3:01 PM


hi, still one one doubt i have got. I want to display the results of both numbers and fruits name separately. In this the return statement i am facing some problem. I want to use two types of return . and siaply the result. It showing some error in the code

code is

import java.io.*;

class Class1 { public static String get() { String data = "";

String data1= "";

    try{ 

     String name="";
     FileInputStream fstream = new FileInputStream("sendfile.txt"); 
     DataInputStream in = new DataInputStream(fstream);
     BufferedReader br = new BufferedReader(new InputStreamReader(in));
  while ((name = br.readLine()) != null) {

String[] split = name.split("\t");

String no = split[0];

String fruits = split[1];

data1+=fruits+"\n";
 data+=no+"\n";

 }

 in.close(); 
 }catch (Exception e){
     System.err.println("Error: " + e.getMessage()); 
     }
     return data;
 return data1;    
     }
     }

     public class Class2 {
public static void main(String[] args) {
Class1 class1 = new Class1(); 
 String data =class1.get();
String data1 =class1.get();
     System.out.println("Data of class1 numbers: " + data);
 System.out.println("Data of class1 fruits: " + data1);

} }

Error is : Class2.java:27: unreachable statement return data1;

Till i have seen. there is only one return used in one class. But i want two kinds of input. How to do such thing with return ?

Help me.



Related Tutorials/Questions & Answers:
how to pass a string from one class to another
how to pass a string from one class to another  hi all, Good morning. I am trying to develop a coding pass a string from one class and declare... string from one class to another. import java.util.*; class A{ static String
How to pass variable from one class to another in java
How to pass variable from one class to another in java  How to pass variable from one class to another in java?   Example: public class...; } } //Another class Class2. public class Class2 { public static void main(String
Advertisements
how to use string of one class into another Class
how to use string of one class into another Class  I created textField(JTextField t1=new JTextField();(it is in ClassA. The input of this textField i.e t1.getText() is to be used in different(another Class say in ClassB. How can
how to pass an array from one jsp to another jsp - JSP-Servlet
how to pass an array from one jsp to another jsp  hi friedns, can any One tell me how to send an array from one jsp to another jsp,pls any one send the code for this.also porvid the code how to retrive the arry in another jsp
How To Pass data from one GUI to another in java swing
How To Pass data from one GUI to another in java swing  I'm new to java and part of our assignment is to build a GUI and display a result set from data input. I'm stuck at how to get the user's input from JTextFields and combobox
how to pass class variable to another class
how to pass class variable to another class  i need to access a variable from a class to another class currently running at the same time. using... class B { static int b=A.get(); public static void main(String[]args
How to pass Array of string from action class to jsp page
How to pass Array of string from action class to jsp page  this is my action class package login.ipm; import java.sql.*; import java.util.ArrayList... class DiagservicesAction extends org.apache.struts.action.Action { private static
how to pass arraylist data from one jsp to another jsp - JSP-Servlet
how to pass arraylist data from one jsp to another jsp  hi to all iam not able to pass the data which is stroed in arraylist, actually i need... the following >XXX/ ? is required to send a value from one jsp to another
Pass cookie from one site to another within the same domain
Pass cookie from one site to another within the same domain  Hi, I want to pass a cookie from one website to another within the same domain. This is just to identify whether the same user is logged in or not. Can anyone help me
how to pass string array from action class to jsp page? pls reply me.
how to pass string array from action class to jsp page? pls reply me.  how to pass string array from action class to jsp page? pls reply me.  .... In your action class, String[] arr = {"A","B","C","D"}; for (int x = 0; x < arr
how can we pass parameters from jsp href to another servlet
how can we pass parameters from jsp href to another servlet  how can we pass parameters from jsp href to another servlet
How to forward the control from one jsp to another?
How to forward the control from one jsp to another?  Hi! This is Prasad Jandrajupalli. I have the 3 JSP's, but I want communicate with each... is not communicate with the Third JSP. I want forward the control from first jsp to second
How to navigate from one jsf to another in eclipse
How to navigate from one jsf to another in eclipse  Hi there is my...; <from-view-id>/JSF/UserDetail.jsp</from-view-id> <navigation-case> <from-outcome>success</from-outcome> <
How can i pass the valus from a JSP to the action class???
How can i pass the valus from a JSP to the action class???  hewllo wevryone... can anyone help me with how i can pass the value of menuId in my JSP and pass it in the action class
swings:how to link from one form to another form
swings:how to link from one form to another form  how to link from one form to another form
How to call the run method from another class?
How to call the run method from another class?  Sorry, if this is a stupid question. I would like to find out how to call the run method... run() { new FereastraPrincipala().setVisible(true); from the class
how to copy file from one directory to another in java with examples
how to copy file from one directory to another in java with examples  how to copy file from one directory to another in java with examples? I want... copy from one directory to another in java. Thanks
how to go from one frame to another frame in swings - Java Beginners
how to go from one frame to another frame in swings  Hi, My task is to go from one frame to another.......... let us think that iam having two... this task in swings or applet......... i have gone through one example of login
how to write function of copy from one to another location in this code
how to write function of copy from one to another location in this code  I need to write a code to copy a file from one location to another using... class Browse extends JFrame implements ActionListener { JButton button1
how to use one form out of multiple form from one jsp to another jsp
how to use one form out of multiple form from one jsp to another jsp  Hi All. please give me your valuable advise for below requirement.. I have... one form from abc.jsp as it is to another .jsp(say def.jsp).Your advise
how to pass variable from simple java main class(not servlet) to the jsp page?
how to pass variable from simple java main class(not servlet) to the jsp page?  I have a simple Java class in which I invoke a call to a JSP page... from the simple Java class to the JSP page. How can I do that? Here is my
Use varibles from another class
Use varibles from another class  **I have two classes. class 1:** public class askfigures extends JFrame { method from class1: public void... in another class. another class: public class Askvalues extends JFrame
passing data from one jframe to another
passing data from one jframe to another  I have two JFrame,built by using the GUI Editor netbeans 6.9.i have to pass a data from a Jtextfield in the first Jframe to another JLabel in the other JFrame.Can you please help me,how
How to copy files from one folder to another based on lastmodified date - Java Beginners
Copy files from one folder to another  How to copy files from one folder to another based on lastmodified date
Pass values from form to form
Pass values from form to form       Java program to pass values from one form to another form... values from one page to another consecutive page which is being called then we can
how to move curosr from one text field to another automatically when the first textfield reaches its maximum length
how to move curosr from one text field to another automatically when the first textfield reaches its maximum length  how to move curosr from one text field to another automatically when the first textfield reaches its maximum
How to copy files from one folder to another based on lastmodified date - Java Beginners
How to copy files from one folder to another based on lastmodified date  I have to make a simple utility to copy files from a folder to another... java.io.*; public class CopyFile{ private static void copyfile(String srFile
How to pass an arraylist from servlet to jsp?
How to pass an arraylist from servlet to jsp?  Hello, Can anyone please tell me how to pass an arraylist from servlet to jsp? I have two arraylist one of type String and the other int. How to send both the arraylists from
calling one jsp from another jsp page
calling one jsp from another jsp page  need coding for calling one jsp from another jsp including the xml file.Its urgent
how to scrape the data from one website another website using html dom parsing in php
how to scrape the data from one website another website using html dom parsing in php  " how to scrape the data from one website another website using html dom parsing in php" i'm trying this one .please provide code for me
how to change password into one jsp to another jsp
how to change password into one jsp to another jsp  i have two jsps in one jsp i give one password and confirm password, in another jsp i want change..."; Connection con=null; String pass=""; int id=0; try{ Class.forName
File copy from one directory to another in java
File copy from one directory to another in java  I am trying to find very good code example for copying a file from one directory to another... from a directory to another directory. How to achieve this? Is there any API
Copy data from one JTextField to another JTextField
, you will learn how to copy the data from one JTextField into another... Copy data from one JTextField to another JTextField... and then paste into another JTextField. JTextField is used in the swing
copying data from one table to another
copying data from one table to another  i need to copy data from one table to another table.. i.e the 1st eid of employee table must be copied...... ...................... String sq="insert into employee values(emp_seq.nextval,'"+ename+"','"+eadd
Moving file or directory from one directory to another
Moving file or directory from one directory to another... directory is moved from one directory to another directory. This program... from one directory to another. In this section an example is given
update one table from another table
update one table from another table  hello, i need to update one table fields by using another table fields. I have to tables Products.... for example TotalQuantity field from Products table should be updated if i
How to pass multiple values from a servlet to JSP?
How to pass multiple values from a servlet to JSP?  hi, I want to pass multiple values form a servlet to JSP. Hw do i do that? I am able to send one value at a time without any prb, but I am unable to carry multiple (from two
to bring checked data from one page to another
to bring checked data from one page to another  thanks for your help... there is one jsp page , on it there is a link, on click of which it is opening second... fetching data from the database on second jsp page with checkbox corresponding each
How to write content of one file to another file.
the use of CheckedOutputStream class. The CheckedOutputStream class is from the java.util.zip package. The CheckedOutputStream  class is used.... And at the same time the CheckedOutputStream  class calculates checksum
Data Conversion from String to another type
Data conversion is the conversion of data from one type to another type. In this section we will learn about data conversion from String primitive type to another data type like int, boolean and char etc
How to pass value from dijit.Tree to dijit.MenuItem - Ajax
How to pass value from dijit.Tree to dijit.MenuItem  Hi Friends, I... node whicl will apper on right click. What I have already done. From my server side(Struts action class) I have passed a JSON structure through URL
how to value of one variable pass in other variable in revetse order
how to value of one variable pass in other variable in revetse order  Like variable a=367 b must have valuev763
get the value from another class - Java Beginners
get the value from another class  Hello to all, I have stupid...().trim(); [/code] How I can get String alsl = ((Node)flnameTEXT.item(0... javax.xml.transform.stream.StreamResult; public class xmlRead{ static public void main(String[] arg
how to set the tables one is left and another one is right - JSP-Servlet
how to set the tables one is left and another one is right  Here two tables are combined.i need to set the one table is left another one is right and ineed to gap between the two tables Document document=new Document
File copy from one drive to another. - Java Beginners
File copy from one drive to another.  I want to copy a .mp3 file from one drive(let d: drive)to another drive(let e: drive) in my Windows XP. How can I do
problem in sending data from one ip to another ip in JAVA
problem in sending data from one ip to another ip in JAVA  Hi guys . this is naveen kumar...i need a help. i want to connect one ip to another ip... device in JAVA. i know how to ping but don't how to send the msg's to another IP
How to pass the value from controller to jsp page ?
How to pass the value from controller to jsp page ?  HI I need to pass the value from controller to jsp. I use the way like this Controller request.setAttribute("msg", "Successfully Login"); In jsp ${msg} and then i
navigating the value of JTextField from one JFrame to another - Swing AWT
navigating the value of JTextField from one JFrame to another  hello I m doing one project where I m retriving the data from databse in JTextField...=conn.createStatement(); ResultSet rs=st.executeQuery("Select * from data"); String
Java - Copying one file to another
the contents from one specified file to another specified file. copyfile(String...;    This example illustrates how to copy contents from one... to another specified file from the first one specified file. // For creating a byte
Problem passing a value from one jsp to another using href
Problem passing a value from one jsp to another using href  first page.jsp <a href="common.jsp?param=<%l.get(k).parentname%>"> common.jsp <%String attr=request.getAttribute("param"); out.print(attr
 

 

 

DMCA.com