How to open another application from a java programme

How can I open some other application like "Textpad"
from a java programme.
Actually I want to open a particular java file in Textpad editor from my java programme.
How Can I do that?
Thanks

Thanks for the code,
I tried that but got this error
java.io.IOException: CreateProcess: C://ProgramFiles/TextPad4/TextPad.exe D://Pi
yush/BeanCreator/Parts.java error=3
at java.lang.Win32Process.create(Native Method)
at java.lang.Win32Process.<init>(Win32Process.java:64)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:272)
at java.lang.Runtime.exec(Runtime.java:195)
at java.lang.Runtime.exec(Runtime.java:152)
at pack.CreateBean.CreateFile(CreateBean.java:327)
Any idea!! What that means

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How to open another application from a java programme

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