Java Class Won't Execute At Command Line

[Preston Thornton]

Hi, everyone,

I am working to sew together a two java programs, and I need to have them execute at the command (DOS prompt, for example) so that I can integrate it into HP Openview Operations as a Monitor program. I was able to test and run the program in Eclipse fine, and not at the command prompt. Here is the code and class files.

package Cmdline;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
 
public class RuntimeExec {
public StreamWrapper getStreamWrapper(InputStream is, String type){
            return new StreamWrapper(is, type);
}
private class StreamWrapper extends Thread {
    InputStream is = null;
    String type = null;
    String message = null;
 
    public String getMessage() {
            return message;
    }
 
    StreamWrapper(InputStream is, String type) {
        this.is = is;
        this.type = type;
    }
 
    public void run() {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            StringBuffer buffer = new StringBuffer();
            String line = null;
            while ( (line = br.readLine()) != null) {
                buffer.append(line);//.append("\n");
            }
            message = buffer.toString();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }
}
 
// this is where the action is
public static void main(String[] args) {
            Runtime rt = Runtime.getRuntime();
            RuntimeExec rte = new RuntimeExec();
            StreamWrapper error, output;
 
            try {
                        Process proc = rt.exec("ping localhost");
                        error = rte.getStreamWrapper(proc.getErrorStream(), "ERROR");
                        output = rte.getStreamWrapper(proc.getInputStream(), "OUTPUT");
                        int exitVal = 0;
 
                        error.start();
                        output.start();
                        error.join(3000);
                        output.join(3000);
                        exitVal = proc.waitFor();
                        System.out.println("Output: "+output.message.substring(0, 40)+"\nError: "+error.message);
            } catch (IOException e) {
                        e.printStackTrace();
            } catch (InterruptedException e) {
                        e.printStackTrace();
            }
            }
}

Class Files:
03/11/2012 11:30 AM 1,493 RuntimeExec$StreamWrapper.class
03/11/2012 11:30 AM 2,124 RuntimeExec.class

Windows CMD prompt:

c:\Users\lthornton>"c:\Program Files\Java\jdk1.6.0_20\bin\java" RuntimeExec
Exception in thread "main" java.lang.NoClassDefFoundError: RuntimeExec
Caused by: java.lang.ClassNotFoundException: RuntimeExec
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: RuntimeExec.  Program will exit.

c:\Users\lthornton>"c:\Program Files\Java\jdk1.6.0_20\bin\java" RuntimeExec$StreamWrapper
Exception in thread "main" java.lang.NoClassDefFoundError: RuntimeExec$StreamWrapper
Caused by: java.lang.ClassNotFoundException: RuntimeExec$StreamWrapper
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: RuntimeExec$StreamWrapper.  Program will exit.

I know its something I am over looking.
Thanks for your help in advance.

L Thornton

[Tina Smith]

The full package name should be included in the name of the class where main() is located.
In your case you want to run "java Cmdline.RuntimeExec"

You may also want to consider adding java to your PATH environment variable, and not capitalizing any part of your package name.

[Preston Thornton]

Thanks! I will make the adjustment and give it a try.

L Thornton

[Randall Twede]

i dont use package statements much but what i remember is you have to cd to the folder one up from the package folder.
for example if the files are in myStuff\cmdLine, you need to cd to myStuff then type java cmdLine/RuntimeExec

[Rob Spoor]

Randall Twede wrote:type java cmdLine/RuntimeExec

java cmdLine.RuntimeExec of course.