Runtime.getRuntime().exec and quoted strings?

Question

Attempting to execute a command containing a quoted string. Being very new to Java I'm guessing I'm not doing it right. Below are two code bits the first one works the second doesn't. So the question is "How do I use quoted strings in a command with .exec?"
// this one works
try {               
p = Runtime.getRuntime().exec("ls -l tst.java");
p.waitFor();
System.out.println("Done!");
catch(Throwable e) {                                  
system.out.println("Errors!");
// this one fails
try {               
p = Runtime.getRuntime().exec("ls -l \"tst.java\"");
p.waitFor();
System.out.println("Done!");
catch(Throwable e) {                                  
system.out.println("Errors!");

Answer 1

I don't know if it is too late for the answer, but I think I know what the problem is.
You are using exec(String) method, and passed String parameter is parsed using StringTokenizer class. This means that when you use quotes as in "file1 file2", StringTokenizer parses this as "file1 and then file2" so it is not understandable command.
To solve the problem, do not use exec(String) method, use exec(String[])
Using this you can send separate command and separate parameters as in following example:
If you want to send (in Unix)
grep "SHOW lotid" text.txt
(using exec("grep \"SHOW lotid\" text.txt") would not work)
Do the following
exec(new String[]{"grep", "SHOW lotid", "text.txt"});
This avoids parsing problem when quotes are used.
Mehmed