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12.19.2004 at 11:32PM PST, ID: 21248115
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4.4

Singleton class

Asked by sathyaarul in Miscellaneous Programming, New to Java Programming, Delphi Components

Tags: , ,

Hi
    This is property file.
Here static method -we dont create instance and access the method through Class.Object.
Now What i need this class should be singleton-that is i dont want create Object of this class -how?

This is my code -can u update and reply?


import java.util.*;
import java.io.*;

class PropertyManager
 {
   private static final Properties prop = new Properties();
private static  FileInputStream fin = null;
   public static void getInstance()
    {

     try
      {
        fin = new FileInputStream("PBCQueryproperties.properties");
        prop.load(fin);
        fin.close();
           }
          catch(IOException e)
          {
        System.out.println("The error is:"+e);
     }
   }

public static String getProperties(String querykey)
   {
     String str = null;

     try
      {
              System.out.println("this is inside of getProperty try block before:"+str);
              if( fin != null)

              str = prop.getProperty(querykey,"No Value found");
              System.out.println("This is inside of getProperty try block After:"+str);

    }
     catch(Exception e)
      {
          System.out.println("This is get property exception:"+e);
        }
   return str;

 }



public static void main(String args[])
  {
       String str = null;
       //PropertyManager pm = new PropertyManager();
       //Properties prop1 = new Properties();
     PropertyManager.getInstance();
     str = PropertyManager.getProperties("pbc.features.ai.fetchempid");
     System.out.println("The String value of Query is :"+str);
  }

}

Thanks

Arulkumar R





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Keywords: Singleton class
Title
1 Singleton class object
2 singleton class
3 IOException / Program Help
4 throws IOException error
5 IOException problem
6 singleton
 
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[+][-]12.20.2004 at 01:36AM PST, ID: 12865108

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About this solution

Zones: Miscellaneous Programming, New to Java Programming, Delphi Components
Tags: arulkumar, fileinputstream, properties
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Solution Provided By: murugesandins
Participating Experts: 1
Solution Grade: B
 
 
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