How to run a java class in console

[peter tong]

I have a class in directory c:\Workspace\RegExTest\bin\RegexTestHarness.class

if I go to directory c:\Workspace\RegExTest\bin and then type
java RegexTestharness
the class can be run successfully.

but if I run in another place and try to run like
java c:\Workspace\RegExTest\bin\RegexTestHarness
or
java -cp c:\Workspace\RegExTest\bin\RegexTestHarness

both return error, so what is the correct syntax to run the class without go to its directory first?
Also, if run in eclipse, there is error "No console."
the class is just copy from tutorial as follow:

import java.io.Console;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class RegexTestHarness {

    public static void main(String[] args){
        Console console = System.console();
        if (console == null) {
            System.err.println("No console.");
            System.exit(1);
        }
        while (true) {

            Pattern pattern = 
            Pattern.compile(console.readLine("%nEnter your regex: "));

            Matcher matcher = 
            pattern.matcher(console.readLine("Enter input string to search: "));

            boolean found = false;
            while (matcher.find()) {
                console.format("I found the text" +
                    " \"%s\" starting at " +
                    "index %d and ending at index %d.%n",
                    matcher.group(),
                    matcher.start(),
                    matcher.end());
                found = true;
            }
            if(!found){
                console.format("No match found.%n");
            }
        }
    }
}

[Thakur Sachin Singh]

set classpath variable for javac and java command .

for this set PATH=C:\Program Files\Java\jdk1.6.0\bin;

now you can compile and run the file on windows machine.

[Jesper de Jong]

Try a command like:

java -cp c:\Workspace\RegExTest\bin RegexTestHarness

Note that the parameter to the -cp is the directory that contains the class file (c:\Workspace\RegExTest\bin). After that is a space, and then the class name.