Runtime Class method exec()

[vishwas bhatt]

Hi every one .
I want to execute "java.exe" from java Programe
Code ("but not working") :
Runtime rt = Runtime.getRuntime();
rt.exec("c:\\jdk1.2.2\\bin\\java.exe");

what's the problem in this ?

[Brett Anthoine]

Hi,
Exec throws an IOException, it is necessary to use a try - catch :

import java.io.*;
public class test {
  
 public static void main(String a[]){
        
        Runtime rt = Runtime.getRuntime();
        try{       
            rt.exec("e:\\j2sdk1.4.0\\bin\\java.exe");
        }
        catch(IOException e) {System.out.println(e);}
    }
}  

Hope it solves your problem
Bye

[Dirk Schreckmann]

Originally posted by vishwas bhatt:
Code ("but not working") :
Runtime rt = Runtime.getRuntime();
rt.exec("c:\\jdk1.2.2\\bin\\java.exe");

If your problem centers around a new console window not opening itself for you, this will work on WinXP (and I think one or two flavors of NT - but I don't think all Windows operating systems):
rt.exec("cmd /c start c:\\jdk1.2.2\\bin\\java.exe");
Good Luck.

[Dirk Schreckmann]

Note: Of course, you'd have to provide "java.exe" with its required argument(s) - otherwise the new console window will just open, run "java.exe" which displays its simple help information, and then the console window will close as the program ("java.exe") has finished executing.
Good Luck.