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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
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
e.printstacktrace();
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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Originally Posted by shubhang 
Please have a look into the code.
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Originally Posted by shubhang
Please also explain the function ofe.printstacktrace();
When I run the program,the search part(HIGHLIGHTED) does not work.
Please tell me where I am going wrong.
Thanks.
Please tell me where I am going wrong.
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);
}
}
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
----------------------------------------------
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
It doesn't work because you compare strings using "==". Try this:
java Syntax (Toggle Plain Text)
So what if you can see the darkest side of me?
No one would ever change this animal I have become
Help me believe it's not the real me
Somebody help me tame this animal
No one would ever change this animal I have become
Help me believe it's not the real me
Somebody help me tame this animal
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