This section provides a tutorial example on how to use 'javaw' tool to launch a Java program without the output console window.
If you launch a Java application with "java" in a command window, JVM will use that command window as the console.
If you launch a Java application with "java" in a different way, "java" will create new command window
and use it as the console.
If you don't want console, you can user "javaw" launch your application. "javaw" works exactly like "java"
except that it will not create any console.
Here is what I did to test the "javaw" tool.
1. Compile ShowMemory.java and copy ShowMemory.class to c:\herong.
2. Go to Start > Run, type "java -classpath c:\herong ShowMemory", and click OK.
3. You should see a command window showing up displaying the program output.
"java" tool created this window as the console.
4. Go to Start > Run, type "javaw -classpath c:\herong ShowMemory", and click OK.
5. You should see no command window showing up. But what happens to my program? Is it still running?
6. Go to Start > Run, type "taskmgr", and click OK. The Windows Task Manager windows shows up.
7. Go to "Process" tab, you should see two Java processes: "java" and "javaw". This answers my previous
question. "javaw" is still running ShowMemory without any console as expected.
Through this tutorial, we should remember that when you use "javaw" to launch an application, no console
window will be created and data sent to the standard output stream will not be displayed. So "javaw" is good tool
for applications that do not need the console window, like GUI applications and server applications.
