Read Multiple Commandlines in Java

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I am trying to read inputs from command line.
My Input is somewhat like this :

# the total size of physical memory (units are B, KB, MB, GB)
512MB 2 # the following are memory allocations
{
abc = alloc(1KB);
{
y_ = alloc(128MB);
x1 = alloc(128MB);
y_ = alloc(32MB);
for (i = 0; i < 256; i++) abc[i] = alloc(512kB);
x1 = alloc(32MB); x2 = alloc(32MB); x3 = alloc(32MB);
x1.next = x2; x2.next = x3; x3.next = x1;
}
abc = alloc(256MB);
}

How can I access each line ?

Any Help???

Posted 10-May-13 8:32am

NSSDNS

Updated 10-May-13 8:38am

Richard C Bishop

v2

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Comments

NSSDNS 12-May-13 22:11pm

I have used this code but I am not sure how I can handle EOF .
Here I handled it with '}' but if multiple loops in input then it will stop executing after 1st '}'.

for(int getlnst=0; getlnst<100; getlnst++)
{
InputInstArray[getlnst] = InstStorageBuf.readLine();
LinesCounter = LinesCounter+1;
if(InputInstArray[getlnst].equals("}"))
break;
}

Filipe Marques 13-May-13 4:42am

So, yours input came from a file? - http://stackoverflow.com/questions/7413830/java-read-line-from-file - You can get each linde from file and do what you want to do with it. Filipe

NSSDNS 13-May-13 10:36am

No , I am collecting my all data in buffer & from there I am using it.

Filipe Marques 13-May-13 11:29am

Why you do not check if the return buffer is empty (yourBuffer.length) or is null? I'm suppose if you reach the EOF, buffer will came null or empty.

NSSDNS 13-May-13 16:57pm

Yes, if I am checking with EOF its not working. I could not find any method for reading buffer length.

Do you mind to share me some sample code with use of it?

Filipe Marques 13-May-13 17:25pm

http://docs.oracle.com/javase/1.4.2/docs/api/java/io/BufferedReader.html
Here you havê the documentation about BufferedReader class. In method readLine(), if the result is null (InputInstArray[getlnst] == null) then you reach the end of your buffer. Filipe

NSSDNS 14-May-13 10:39am

String InputInstArray[] = new String[100];
BufferedReader InstStorageBuf= new BufferedReader(new InputStreamReader(System.in));
//Read Input Instructions
for(int getlnst=0; getlnst<100; getlnst++) {
InputInstArray[getlnst] = InstStorageBuf.readLine();
LinesCounter = LinesCounter+1;
//if(InputInstArray[getlnst].equals("}"))
if(InstStorageBuf.readLine()==null)
break; }

Here is my code. My all data is in buffer & now I am trying to fetch it in array but its not working:(

Filipe Marques 14-May-13 13:10pm

Please, see my update. Filipe

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Filipe Marques · Answer 1 · 2013-05-11T05:26:00

Hi,

Try this:

Java

public class Main {
	public static void main(String[] args) {
		String initialString = "line1\nline2\nline3";
		System.out.println(initialString);
		System.out.println();
		
		// Get each line of your initialString
		String[] eachString = initialString.split("\n");
		for(int i = 0; i < eachString.length; i++) {
			System.out.println("My line " + i + ": " + eachString[i]);
		}
	}
}

[UPDATE]