Remote debugging with eclipse

Debugging java application or web application on server is very painful with a lot of reasons. Here I set the server and client the same computer.

I used eclipse here so make sure you installed eclipse

Setup Server:

Assume you've finished your java code and looks like below:

public class ForInterview {

        public static void main(String[] args) {

String a = "ARMZM2G002825";

float b = genIndex(a);

float d = (float) 5.020802E24;

System.out.println(b == d);

int c = 'Z' - '\u0030';

System.out.println(c);

    }

}

Export the project/ForInterview.jar into some directory where you regard as the server. You can save it on your local machine or remote server. 

Then run 

    java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8000 -jar    ForInterview.jar 

You'll see Listening for transport dt_socket at address: 8000

Now the server is waiting for debug command. 

// From java5 you can run  -agentlib:jdwp instead of -Xdebug -Xrunjdwp

Setup Client:

Right click on eclipse Run->Debug Configuration->Remote Java Application and setup the client as the graph below:

You can change whatever Host or Port as the server needed. But I think if the server require permission, there might be a problem, I haven't try that.