Java

Need help in code

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Join Date: Oct 2008

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shubhang

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Need help in code

Nov 14th, 2008

I am new at java.
I am making an address book program.
Below is a code of the Search class.
Could anyone please look into it?
The program is giving a problem while runtime.

 Help with Code Tags 
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import java.io.*;
import java.util.*;
class search
{
	private String str,sval;
	private String arr[]=new String[8];
	char ch1='y',ch2;
	private int n,ctr;
	clear c1=new clear();
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
 
	public void calc()throws IOException
	{
		DataInputStream in=new DataInputStream(new FileInputStream("adbk.txt"));			//file read
		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:");
		n=Integer.parseInt(br.readLine())-1;
		c1.clr();																			//clr here
 
		switch(n)
		{
			case 1:
			{
				System.out.println("enter fn");
			}
			case 2:
			{
				System.out.println("enter ln");
			}
			case 3:
			{
				System.out.println("enter arcd");
			}
			case 4:
			{
				System.out.println("enter city");
			}
			case 5:
			{
				System.out.println("enter state");
			}
			default:
			{
				System.out.println("error");
				break;
			}
		}
		sval=br.readLine();
 
 
				c1.clr();																			//clr here
 
 
		while(in.available()!=0)
		{
			str=in.readLine();
			StringTokenizer st=new StringTokenizer(str," ");
			for(int i=0;i<8;i++)
			{
				arr[i]=st.nextToken();
			}
 
			if(sval==arr[n])
			{
				ctr++;
				for(int i=0;i<8;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];
	char ch1='y',ch2;
	private int n,ctr;
	clear c1=new clear();
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

	public void calc()throws IOException
	{
		DataInputStream in=new DataInputStream(new FileInputStream("adbk.txt"));			//file read
		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:");
		n=Integer.parseInt(br.readLine())-1;
		c1.clr();																			//clr here

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


				c1.clr();																			//clr here


		while(in.available()!=0)
		{
			str=in.readLine();
			StringTokenizer st=new StringTokenizer(str," ");
			for(int i=0;i<8;i++)
			{
				arr[i]=st.nextToken();
			}

			if(sval==arr[n])
			{
				ctr++;
				for(int i=0;i<8;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");
			}
		}
}

Help will be highly appreciated.

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peter_budo peter_budo is offline

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Re: Need help in code

-1

Nov 14th, 2008

What are the error messages? Post the whole stack.

Learn to see in another's calamity the ills which you should avoid.
Publilius Syrus
(~100 BC)
LJC - London Java Community, Graduate & Undergraduate Software Development Community, JAVAWUG (Java Web User Group), The London Android Group

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Join Date: Oct 2008

Posts: 25

Reputation: shubhang is an unknown quantity at this point

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shubhang

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Re: Need help in code

Nov 14th, 2008

Please try running the program.
It is a part of my address book program.
The class searches records by first name,surname,area code,city and state.
The clear class just prints 100 blank lines to make it look as if the screen has cleared(I did not know of any other method).

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Ezzaral

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Re: Need help in code

Nov 14th, 2008

You really should change

 Help with Code Tags 
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System.out.println("error");
System.out.println("error");

 Help with Code Tags 
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e.printStackTrace();
e.printStackTrace();

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Join Date: Oct 2008

Posts: 25

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shubhang

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Re: Need help in code

Nov 15th, 2008

Sir , but what does this do? e.printStackTrace();
Was this the main problem in the code?

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Join Date: Oct 2008

Posts: 25

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shubhang

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Re: Need help in code

Nov 15th, 2008

Sir,
I tried the

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

,instead of

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
System.out.println("error");
System.out.println("error");

But now I get a compile time error as follows:

C:\Documents and Settings\comp1\My Documents\search.java:49: cannot resolve symbol
symbol : variable e
location: class search
e.printStackTrace();

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Join Date: Oct 2008

Posts: 25

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shubhang

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Re: Need help in code

Nov 15th, 2008

This is the modified code.
It is not working properly.
Please look into it.

 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];
	char ch1='y',ch2;
	private int n,ctr;
	clear c1=new clear();
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
 
	public void calc()throws IOException
	{
		DataInputStream in=new DataInputStream(new FileInputStream("adbk.txt"));			//file read
		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:");
		n=Integer.parseInt(br.readLine());
																							//clr here
 
		switch(n)
		{
			case 1:
			{
				System.out.println("enter fn");
				break;
			}
			case 2:
			{
				System.out.println("enter ln");
				break;
			}
			case 3:
			{
				System.out.println("enter arcd");
				break;
			}
			case 4:
			{
				System.out.println("enter city");
				break;
			}
			case 5:
			{
				System.out.println("enter state");
				break;
			}
			default:
			{
				System.out.println("error");
				break;
			}
		}
		sval=br.readLine();
 
 
		while(in.available()!=0)
		{
			str=in.readLine();
			StringTokenizer st=new StringTokenizer(str," ");
			for(int i=0;i<8;i++)
			{
				arr[i]=st.nextToken();
			}
 
			if(sval==arr[n])
			{
				ctr++;
				for(int i=0;i<8;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)
			{
				e.printStackTrace();
			}
		}
}
import java.io.*;
import java.util.*;
class search
{
	private String str,sval;
	private String arr[]=new String[8];
	char ch1='y',ch2;
	private int n,ctr;
	clear c1=new clear();
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

	public void calc()throws IOException
	{
		DataInputStream in=new DataInputStream(new FileInputStream("adbk.txt"));			//file read
		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:");
		n=Integer.parseInt(br.readLine());
																							//clr here

		switch(n)
		{
			case 1:
			{
				System.out.println("enter fn");
				break;
			}
			case 2:
			{
				System.out.println("enter ln");
				break;
			}
			case 3:
			{
				System.out.println("enter arcd");
				break;
			}
			case 4:
			{
				System.out.println("enter city");
				break;
			}
			case 5:
			{
				System.out.println("enter state");
				break;
			}
			default:
			{
				System.out.println("error");
				break;
			}
		}
		sval=br.readLine();
		
												
		while(in.available()!=0)
		{
			str=in.readLine();
			StringTokenizer st=new StringTokenizer(str," ");
			for(int i=0;i<8;i++)
			{
				arr[i]=st.nextToken();
			}

			if(sval==arr[n])
			{
				ctr++;
				for(int i=0;i<8;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)
			{
				e.printStackTrace();
			}
		}
}

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Join Date: Aug 2007

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jasimp

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Re: Need help in code

Nov 15th, 2008

•

Originally Posted by shubhang

This is the modified code.
It is not working properly.
Please look into it.

That's really not enough information to go by. What specifically isn't working? I'm not seeing any compilation issues so whatever isn't working is most likely a logic error.

"Argyou not with the hand you are dealt in cards or life." ---- Wizard and Glass

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Join Date: Oct 2008

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shubhang

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Re: Need help in code

Nov 15th, 2008

The error i get while runtime is as follows:

 Help with Code Tags 
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Exception in thread "main" java.util.NoSuchElementException
                                   at java.util.StringTokenizer.nextToken(StringTokenizer.java:232)
                                   at search.calc(search.java:70)
                                   at search.main(search.java:93)
Exception in thread "main" java.util.NoSuchElementException
                                   at java.util.StringTokenizer.nextToken(StringTokenizer.java:232)
                                   at search.calc(search.java:70)
                                   at search.main(search.java:93)