[java]String Object Problem

[Pyro.699]

Hello,

I used the code:



File f = new File(file);
FileReader fr = new FileReader(f);
LineNumberReader lnreader = new LineNumberReader(fr);

String line = "";

while ((line = lnreader.readLine()) != null){
String[] spl = line.split("(?<!\\\\)\\.");


to read each line of a file and then split it accordingly. I end up with a String[] with 4 sections. spl[0] to spl[3], what i need to do is check to see if spl[0] is equal to another string like:



if(spl[0] == "This")


Ive tried several things like:



if(spl[0] == "This"){}
if(spl[0].equalsIgnoreCase("This")){}
if(spl[0].toLowerCase("This")){}


I have a feeling that spl[0] is not a string object or anything.

Thanks
~Cody Woolaver

[mike_g]

Maybe something like:

if (spl[0].toLowerCase().equals("this"))
You cant use the equality operator in strings in Java. instead use the string .equals() method.

Cheers.

[Pyro.699]

Ill try to go into more depth with my program because it didnt work...

This is the file that is being read


Process.List..a7fad20aa0662e9ee31e39ea7367e4b1
Process.Kill{pid}.523543.8a766fdadc85232b26fbcacfc 4256137
Process.Kill{name}.gedit.aa8f8f8c89bb8f7d1695694a9 6dc9a75


This section reads the lines and splits them bassed on "." as long as its not "\."


File f = new File(file);
FileReader fr = new FileReader(f);
LineNumberReader lnreader = new LineNumberReader(fr);

String line = "";

while ((line = lnreader.readLine()) != null){
String[] spl = line.split("(?<!\\\\)\\.");
//Main ======= spl[0]
//Secondary == spl[1]
//Command ==== spl[2]
//Hash ======= spl[3]

This is the section of code that process' the lines


//The Process Command
else if(spl[0].equalsIgnoreCase("Process")){
//List
if(spl[1].equalsIgnoreCase("List")){
Process p1 = Runtime.getRuntime().exec("ps -u cody");
InputStreamReader reader = new InputStreamReader ( p1.getInputStream () );
BufferedReader buf_reader = new BufferedReader ( reader );
String lne,total="";

while ((lne = buf_reader.readLine ()) != null)
{
total += lne+"\n";
}

System.out.println("Process:List");
addToUpFile("["+spl[3]+"]\n"+total);
}
//Kill{pid}
else if(spl[1].equalsIgnoreCase("Kill{pid}"))
{
//TODO make sure the process existed to begin with
Process p2 = Runtime.getRuntime().exec("kill "+spl[0]);
p2.waitFor();
//TODO make sure that the process is gone now that the application has been run
//TODO send return data base on previous results
System.out.println("Process:Kill{pid}");
addToUpFile("["+spl[3]+"]\n"+"Done!");
}
//Kill{name}
else if(spl[1].equalsIgnoreCase("Kill{name}")){
//TODO ... All of this section -.- im too lazzy to do it right now
//TODO basically use 'ps -u cody' to get the process' and then search eachline and get the pid, kill that
//TODO send return value
System.out.println("Process:Kill{name}");
addToUpFile("["+spl[3]+"]\n"+"Done!");
}
}

[pp.]

I have a feeling that spl[0] is not a string object or anything.

What kind of thing is spl[0], then?

[Pyro.699]

It is suppose to be a string object, but its not acting as one.

[pp.]

It is suppose to be a string object, but its not acting as one.

Java - like most other languages - can determine the type of any given object. There's no need to suppose anything about an object in the program. With a modest amount of coding, you can determine the type and the value of any object.

[Pyro.699]

Then can you explain why the code above doesn't seem to work?

[pp.]

Sorry, I have neither the time, the capability nor the inclination to analyse your code for you.

I gave you the very broad hint that you have all tools at your disposal to determine the cause of the problem you wish to solve. The hint consisted of adding a few lines of debugging code to your program which tells you the class and the value of the item you suppose to be a string.