How to read from a .txt and match the strings.

[dmvsatyakumar]

I Have a file name.txt.
Below is the format of names.txt.

1 SATYA;
2 KUMAR;
3 MOHAN;
4 Venkat;

In my java code i get an integer(say 3).
With that integer(3) i should pick the corresponding name from the names.txt and display on the screen.
How do i do that?

if input is 3 the display must be MOHAN.
if input is 4 the display must be Venkat.
if input is 2 the display must be KUMAR.


Please send few lines of code for this operation.

[r035198x]

I Have a file name.txt.
Below is the format of names.txt.

1 SATYA;
2 KUMAR;
3 MOHAN;
4 Venkat;

In my java code i get an integer(say 3).
With that integer(3) i should pick the corresponding name from the names.txt and display on the screen.
How do i do that?

if input is 3 the display must be MOHAN.
if input is 4 the display must be Venkat.
if input is 2 the display must be KUMAR.


Please send few lines of code for this operation.

You write the code first and post it. Use

BufferedReader br = new BufferedReader(new FileReader("fileName.txt")); 

to open the file
and

br.readLine(); 

to read a line from the file

[dmvsatyakumar]

You write the code first and post it. Use

BufferedReader br = new BufferedReader(new FileReader("fileName.txt")); 

to open the file
and

br.readLine(); 

to read a line from the file

I want without BufferedReader. i.e, with InputStreamRead er.

Can you suggest me a way to through this.

[r035198x]

I want without BufferedReader. i.e, with InputStreamRead er.

Can you suggest me a way to through this.

That is very bad practice. You should use a Scanner, BufferedReader or RandomAccessFil e for this.

Why do you want to use InputStreamRead er?

[dmvsatyakumar]

That is very bad practice. You should use a Scanner, BufferedReader or RandomAccessFil e for this.

Why do you want to use InputStreamRead er?

We have restricted pacakge access.We use our own packages derived from java api. Hence we cant use all the classes in the Java API.

[r035198x]

We have restricted pacakge access.We use our own packages derived from java api. Hence we cant use all the classes in the Java API.

I don't understand this. You have access to InputStreamRead er but not to RandomAccessFil e or FileReader? What other io classes are you not allowed to use then because the InputStreamRead er alone cannot read a file.


Here is an exctract of the API specs


An InputStreamRead er is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specifiedcharse t .The charset that it uses may be specified by name or may be given explicitly, or the platform's default charset may be accepted.

Each invocation of one of an InputStreamRead er's read() methods may cause one or more bytes to be read from the underlying byte-input stream. To enable the efficient conversion of bytes to characters, more bytes may be read ahead from the underlying stream than are necessary to satisfy the current read operation.

For top efficiency, consider wrapping an InputStreamRead er within a BufferedReader. For example: BufferedReader in = new BufferedReader( new InputStreamRead er(System.in));