RecordStore class in java

[Level8]

Can anyone from you give me the details about the RecordStore Class, so that it will be helpful to me. I have to create a CaseStudy on the RecordStore Class in java. So, if you give me some basic information then it will help me to create this casestudy by understanding it. So, please reply me.

[Praetor]

RecordStore class in java provides the methods below:

• addRecord(byte[] value, int one, int two)
• addRecordListener(RecordListener lst)
• closeRecordStore()
• deleteRecord()
• deleteRecordStore(String one)
• enumerateRecords(RecordFilter flt, RecordComparator cmp, boolean kept)
• getLastModified()
• getName()
• getNextRecordID()
• getNumRecords()
• getRecord(int id)
• getRecord(int id, byte[] bfr, int one)
• getRecordSize(int id)
• getSize()
• getSizeAvailable()
• getVersion()
• listRecordStores()
• openRecordStore(String name, boolean isyes)
• removeRecordListener(RecordListener lst)
• setRecord(int id, byte[] value, int one, int two)

[Katty]

Hello, I don't know the RecordStore class. But I have one code which will help you to get to know more about this class, if you want to know. Use the code below to get more knowledge about the working of RecordStrore class in java.

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;
import javax.microedition.rms.*;

public class Testing extends MIDlet
{
	private RecordStore rstore = null;
	static final String str = "Testing";

	public void startApp()
	{
		openRecStore();
		writeRecord("One");
		writeRecord("Two");    
		readRecords();
		closeRecStore();
		deleteRecStore(); 
	}

	public void pauseApp()
	{
	}

	public void destroyApp(boolean unconditional)
	{
		notifyDestroyed();
	}

	public void openRecStore()
	{
		try
		{
			rstore = RecordStore.openRecordStore(str, true );
		}
		catch (Exception e)
		{
		}
	}    

	public void closeRecStore()
	{
		try
		{
			rstore.closeRecordStore();
		}
		catch (Exception e)
		{
		}
	}

	public void deleteRecStore()
	{
		if (RecordStore.listRecordStores() != null)
		{
			try
			{
				RecordStore.deleteRecordStore(str);
			}
			catch (Exception e)
			{
			}
		}      
	}

	public void writeRecord(String str)
	{
		byte[] rec = str.getBytes();
		try
		{
			rstore.addRecord(rec, 0, rec.length);
		}
		catch (Exception e)
		{
		}
	}

	public void readRecords()
	{
		try
		{
			byte[] recData = new byte[5]; 
			int len;
			
			for(int i = 1; i <= rstore.getNumRecords(); i++)
			{
				if(rstore.getRecordSize(i) > recData.length)
				{
					recData = new byte[rstore.getRecordSize(i)];
				}
				len = rstore.getRecord(i, recData, 0);
				System.out.println("Record " + i + " : " + new String(recData, 0, len));
		  	}
		}
		catch (Exception e)
		{
		}
	}
}

[kelfro]

Hey, I also don't know about the RecordStore class in java. Where did you get this stuff. That means in which book you find the information about it. I have Complete Reference: Java 2, but in this book I am not able to find out any information about the RecordStore Class in java. So, if anyone has the details about it, then please give me that to me also. I am waiting for your reply. Please reply me.

[Zecho]

I am not having that much great knowledge about the RecordStore class in java, but have little information. This class basically represents a record store. And a record store consists of a collection of records. Why did it used, I don't know, but I think that you will able to get more information about it from the site of sun. You will able to get more information about the RecordStore class in java from this site, I suppose.