Using GUI Runtime.exec() another GUI, later come up, previous gone

Question

I try to run
try {
     Runtime rt = Runtime.getRuntime();
     Process process = rt.exec("1.bat");
InputStream stdin = process.getInputStream();
InputStreamReader isr = new InputStreamReader(stdin);
BufferedReader br = new BufferedReader(isr);
String line = null;
System.out.println("<OUTPUT>");
while ( (line = br.readLine()) != null)
System.out.println(line);
     int exitVal = process.exitValue();
     System.out.println("Process exitValue: " + exitVal);                         
catch (Throwable e) {
     e.printStackTrace();
1.bat file have
================
del *.class
set path=%path%;c:\j2sdk1.4.2\bin
javac IDE.java
java IDE
I run the Runtime.exec code in Swing GUI, I will compile another
Swing GUI (IDE.java) and run it. It work, but after when IDE GUI popup,
all the button in the first calling GUI is gone, anyone have solution for it ? Thanks in advance.

Answer 1

Your code is probably being executed in the event thread of the first application, thus blocking any and all screen updates.
You should wrap the code in a separate Thread and start it in parallell.