it works with 1 part, but when i put it into an arraylist, it wont compile


for (int i = 0; i<FileList.size(); i++)
{

...

String.split(" ") doesnt work. what would the syntax for the tab deliminater be?

I have a tab delimilated txt file. how can i read only the second part of the file. ex

10.0.0.0 hostname date

i want to read in the hostname only

what function can i use to do this?

Runtime() has private access in java.lang.Runtime
Runtime r = new Runtime();


why am i getting this error?

I am trying to write a program that will monitor my routers and servers and notify me when they go down. I am looking for a way to ping the host and read the reply. The InetAddress.isReachable...

i read it again and i still understand the same thing.

i obiously dont understand how to use it.

can you help me out or not.

yes and according to the instructions that is how u should use it.

array is an arraylist<string>


for (int i = 0; i<array.size(); i++)
{
System.out.println(array.get(i).split(" "));

}

the file is tab separated into three sections.

section1 section2 section3

i only want to read section2

I have a file that is tab separated. i read it in as an arraylist<string> how can i print out only the second section of the file?

i have a 2d array. i know the position. how can i print it out.

i just need to print out 1 single element not the entire array.

I have a 2d char array and i need to find the position of a specific char in the array. what method can i use.

return Arrays.binarySearch(this.matrixCopy, "S");

does not work it keeps...

so what function can i use to read in a single char at a time?

What is wrong with this code. when it do system.out.println(matrix[0][0] i should get 1 char i get the entire line.


int r =Integer.parseInt(line.substring(0));
int c = 10;
...

i have a file with 2 int's i need to assign them to a variables. the int's are separeated by a space. what method can i use to read each int separeate and then assign it to a variable.

got it working now, but it is printing out the wrong thing.


private void printFile()
{

for(int i=0; i<matrix.size(); i++)
{
...

line is getting a value, but for some reason matrix is not being populated. "i" always stays at 0. and there is info on the file it is reading from

this is what im getting when i compile:

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at...

i tried the scanner thing and nothing.


String fName = "c:\\game.txt";
ArrayList<ArrayList<String>> matrix = new ArrayList<ArrayList<String>>();




private void...

what is wrong with this code. it does not read the input file correctly.

[/code]
private void readFile()
{
String fName = "c:\\game.txt";
ArrayList<ArrayList<String>> matrix = new...

[/code]
String data;
String[][] matrix = new String[4][4];


private void readFile()
{
try
{
Scanner s = new Scanner(this.fname);

changed matrix and next to string. now it compiles but when i try running it goes into an endless loop?

why wont this work? i have a txt file that i need to read into a matrix. i want to read into a char array so i can analyze each char separate.

[/code]
String fname = "c:\\game.txt";
char[][]...

i eventually want to read the file into a 2d array. i want to be able to find a particular character in the matrix.

How do i read a txt file into a char array. what i have so far only give me blank lines
[/code]

String fname = "c:\\game.txt";
char data;
int row = 2;
int col = 4;
...

on the above code i got the following output:


File: pathcanonical path: c:\testing.txt can write:false can readfalse

yes ur code works, but i already have a predefined list of files. i am not creating the files. the files are already there.

yes i have permission. it shouldnt matter,but i create blank files just for testing to make sure it actually deletes.

i am using XP pro SP3

in fileDelete()

inside the for loop after the File f statement i also have:
f.delte();

complete code


private ArrayList<String> Files2Delete = new ArrayList<String>();
private String fName = "c:\\TestFile.txt";

public Files()
{
this.fileCollection();
...

it shows the files in the arraylist

c:\testing.txt
c:\whatever\testing2.txt
c:\something\else\testing3.txt

i am adding a list of files like

c:\testing.txt
c:\whatever\testing2.txt
c:\something\else\testing3.txt

and so forth.

they are files no directories. just a list of files.

yes i already tried that, but my question is would the code work. i usually program with c# not java. so is my code above fine. basically does f.delete() is that the correct funtion to delete...

Why wont this delete the files in the arraylist. i checked the arraylist and the files are there. i even added a "\\" to the files and still nothing. i dont get any errors.



private void...

What is wrong with my code. it poulates the arraylist with only the filename "c:\testfile.txt" i need it to populate it with the contents of the file.


private ArrayList<String> Files2Delete =...

for some reason my code is not going into the for loop. i completely skips it. any ideas??



private ArrayList<Investment> investments = new ArrayList<Investment>();

public String...

but i still dont have a return statement!!. how do i add it. I need to return yesterdays date??

I am new to programing. i know how to return a date


public Date yesterday()
{

if(this.day == 1)
{
if(this.Check("Mar", this.month))
{

i got it to work, but it only works 8 now = 0, but i want 9 to =1 and 10 to = 2 and so forth. so basically i want the array to go in a loop.