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Editorial Team
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Asked: 2026-05-28T14:44:49+00:00

I am using jdj 1.7,netbeans 7 versions. I wrote a program that’s working fine.

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I am using jdj 1.7,netbeans 7 versions. I wrote a program that’s working fine. Now i want to clear the console window after many outputs in the console. I tried the below line Runtime.getRuntime().exec("cls"); also tried with exec(“clear”). But i am getting these errors: 

Exception in thread "main" java.io.IOException: Cannot run program "cls": CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
at java.lang.Runtime.exec(Runtime.java:593)
at java.lang.Runtime.exec(Runtime.java:431)
at java.lang.Runtime.exec(Runtime.java:328)
at Periodical.main(Book.java:88)

Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.(ProcessImpl.java:81)
at java.lang.ProcessImpl.start(ProcessImpl.java:30)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)

What’s the problem here. How can i clear the console? Thank you

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1 Answer

  1. Editorial Team

    If you want to keep it portable you might want to use a library like jcurses. That will save you the trouble of having to detect what kind of console/terminal you are on and will give you a lot of other nice features like cursor and color control.

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