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Need urgent help in code!

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Join Date: Oct 2008

Posts: 25

Reputation: shubhang is an unknown quantity at this point

Solved Threads: 0

shubhang

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Need urgent help in code!

Nov 19th, 2008

Hi,
I am new at java.
I have made the search class of an address book program
with the functions of add, modify and delete.

Please have a look into the code.

Please also explain the function of

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
 e.printstacktrace();
 e.printstacktrace();

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
import java.io.*;
import java.util.*;
class search
{
	private String str,sval;
	private String arr[]=new String[8];
	private int ch;
	private int pos,ctr;
	clear c1=new clear();
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
 
	public void calc()throws IOException
	{
 
                DataInputStream in=DataInputStream(new FileInputStream("adbk.txt"));
		System.out.println("How would you like to search?");
		System.out.println("1)by fn");
		System.out.println("2)by ln");
		System.out.println("3)by area code");
		System.out.println("4)by city");
		System.out.println("5)by state");
		System.out.println("enter choice:");
		ch=Integer.parseInt(br.readLine());
 
 
		switch(ch)
		{
			case 1:
			{
				System.out.println("enter fn");
				pos=0;
				break;
			}
			case 2:
			{
				System.out.println("enter ln");
				pos=2;
				break;
			}
			case 3:
			{
				System.out.println("enter arcd");
				pos=3;
				break;
			}
			case 4:
			{
				System.out.println("enter city");
				pos=5;
				break;
			}
			case 5:
			{
				System.out.println("enter state");
				pos=6;
				break;
			}
			default:
			{
				System.out.println("error");
				break;
			}
		}
		sval=br.readLine();
 
 
																					//clr here
		while((str=in.readLine())!=null)
		{
 
			StringTokenizer st=new StringTokenizer(str,"_");
			for(int i=0;i<=7;i++)
			{
				arr[i]=st.nextToken();
			}
 
			if(sval==arr[pos])
			{
				ctr++;
				for(int i=0;i<=7;i++)
				{
					System.out.print(arr[i]+" ");
				}
				System.out.println();
			}
 
		}
 
		System.out.println("Total hits="+ctr);
 
	}
	public static void main(String args[])
		{
			search s=new search();
 
			try
			{
				s.calc();
			}
 
			catch(IOException e)
			{
				System.out.println("error");
			}
		}
}
import java.io.*;
import java.util.*;
class search
{
	private String str,sval;
	private String arr[]=new String[8];
	private int ch;
	private int pos,ctr;
	clear c1=new clear();
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

	public void calc()throws IOException
	{
			
                DataInputStream in=DataInputStream(new FileInputStream("adbk.txt"));
		System.out.println("How would you like to search?");
		System.out.println("1)by fn");
		System.out.println("2)by ln");
		System.out.println("3)by area code");
		System.out.println("4)by city");
		System.out.println("5)by state");
		System.out.println("enter choice:");
		ch=Integer.parseInt(br.readLine());
																							

		switch(ch)
		{
			case 1:
			{
				System.out.println("enter fn");
				pos=0;
				break;
			}
			case 2:
			{
				System.out.println("enter ln");
				pos=2;
				break;
			}
			case 3:
			{
				System.out.println("enter arcd");
				pos=3;
				break;
			}
			case 4:
			{
				System.out.println("enter city");
				pos=5;
				break;
			}
			case 5:
			{
				System.out.println("enter state");
				pos=6;
				break;
			}
			default:
			{
				System.out.println("error");
				break;
			}
		}
		sval=br.readLine();


																					//clr here
		while((str=in.readLine())!=null)
		{

			StringTokenizer st=new StringTokenizer(str,"_");
			for(int i=0;i<=7;i++)
			{
				arr[i]=st.nextToken();
			}

			if(sval==arr[pos])
			{
				ctr++;
				for(int i=0;i<=7;i++)
				{
					System.out.print(arr[i]+" ");
				}
				System.out.println();
			}

		}

		System.out.println("Total hits="+ctr);

	}
	public static void main(String args[])
		{
			search s=new search();

			try
			{
				s.calc();
			}

			catch(IOException e)
			{
				System.out.println("error");
			}
		}
}

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Join Date: May 2007

Posts: 4,346

Reputation: Ezzaral has much to be proud of

Solved Threads: 498

Ezzaral

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Industrious Poster

Re: Need urgent help in code!

Nov 19th, 2008

•

Originally Posted by shubhang

Please have a look into the code.

Why? Is there something wrong with it? If so, what specifically?

•

Originally Posted by shubhang

Please also explain the function of
Help with Code Tags

Java Syntax (Toggle Plain Text)
 e.printstacktrace();
e.printstacktrace();

There is no such function as you have written it. There is, however, a printStackTrace() method on Throwable. Read that API link to see what it does.

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Join Date: Oct 2008

Posts: 25

Reputation: shubhang is an unknown quantity at this point

Solved Threads: 0

shubhang

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Re: Need urgent help in code!

Nov 20th, 2008

When I run the program,the search part(HIGHLIGHTED) does not work.
Please tell me where I am going wrong.

Help with Code Tags

(Toggle Plain Text)

import java.io.*;
import java.util.*;
class search
{
	private String str,sval;
	private String arr[]=new String[8];
	private int ch;
	private int pos,ctr;

	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

	public void calc()throws IOException
	{
		BufferedReader in=new BufferedReader(new FileReader("adbk.txt"));			//file read
		//DataInputStream in=DataInputStream(new FileInputStream("adbk.txt"));
		System.out.println("How would you like to search?");
		System.out.println("1)by fn");
		System.out.println("2)by ln");
		System.out.println("3)by area code");
		System.out.println("4)by city");
		System.out.println("5)by state");
		System.out.println("enter choice:");
		ch=Integer.parseInt(br.readLine());
																							

		switch(ch)
		{
			case 1:
			{
				System.out.println("enter fn");
				pos=0;
				break;
			}
			case 2:
			{
				System.out.println("enter ln");
				pos=2;
				break;
			}
			case 3:
			{
				System.out.println("enter arcd");
				pos=3;
				break;
			}
			case 4:
			{
				System.out.println("enter city");
				pos=5;
				break;
			}
			case 5:
			{
				System.out.println("enter state");
				pos=6;
				break;
			}
			default:
			{
				System.out.println("error");
				break;
			}
		}
		sval=br.readLine();
																							//clr here
		while((str=in.readLine())!=null)
		{

			StringTokenizer st=new StringTokenizer(str,"_");
			for(int i=0;i<=7;i++)
			{
				arr[i]=st.nextToken();


			}
			System.out.println();

			if(sval==arr[pos])
			{
				ctr++;
				for(int i=0;i<=7;i++)
				{
					System.out.print(arr[i]+" ");
				}
				System.out.println("");
			}

		}

		System.out.println("Total hits="+ctr);

	}

}

Thanks.

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Join Date: Feb 2006

Posts: 2,281

Reputation: masijade has much to be proud of

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masijade

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Nearly a Posting Maven

Re: Need urgent help in code!

Nov 20th, 2008

Define "does not work".

Java Programmer and Sun Systems Administrator

----------------------------------------------

Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan

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Join Date: Nov 2008

Posts: 249

Reputation: Antenka has a spectacular aura about

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Antenka

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Posting Whiz in Training

Re: Need urgent help in code!

Nov 20th, 2008

It doesn't work because you compare strings using "==". Try this:

 Help with Code Tags 
 java Syntax (Toggle Plain Text) 
if(sval.equals(arr[pos]))
if(sval.equals(arr[pos]))

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