How clear console using java

[AimsLife]

Hi,

I am using Jdk1.5 for development. I need to clear java console after
printing 100 lines of test on console. I tried below code it is
working for compiling java (.java) but it through exception
(IOException).

try {
Process dir = Runtime.getRuntime().exec("cls");
BufferedReader bufr_in = new BufferedReader(new
InputStreamReader(dir.getInputStream()));
String readLine = "";
if( ( readLine = bufr_in.readLine() ) != null )
{
System.out.println(readLine);
while( ( readLine = bufr_in.readLine() ) != null )
System.out.println (readLine);
}

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Above code throws exception at run time.

java.io.IOException: Cannot run program "cls": CreateProcess error=2,
The system cannot find the file specified
at java.lang.ProcessBuilder.start(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at atm.Driver.main(Driver.java :52)
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.<init>(Unknown Source)
at java.lang.ProcessImpl.start(Unknown Source)
... 5 more

Please guide me, where I am going wrong thing? And how I can clear
console through my code?

Regards,
-aimslife

 

[manishsw]

Hi,

I am using Jdk1.5 for development. I need to clear java console after
printing 100 lines of test on console. I tried below code it is
working for compiling java (.java) but it through exception
(IOException).

try {
Process dir = Runtime.getRuntime().exec("cls");
BufferedReader bufr_in = new BufferedReader(new
InputStreamReader(dir.getInputStream()));
String readLine = "";
if( ( readLine = bufr_in.readLine() ) != null )
{
System.out.println(readLine);
while( ( readLine = bufr_in.readLine() ) != null )
System.out.println (readLine);
}

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Above code throws exception at run time.

java.io.IOException: Cannot run program "cls": CreateProcess error=2,
The system cannot find the file specified
at java.lang.ProcessBuilder.start(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at atm.Driver.main(Driver.java :52)
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.<init>(Unknown Source)
at java.lang.ProcessImpl.start(Unknown Source)
... 5 more

Please guide me, where I am going wrong thing? And how I can clear
console through my code?

Regards,
-aimslife

http://www.rgagnon.com/javadetails/java-0469.html

 

[Roedy Green]

need to clear java console after
printing 100 lines of test on console.

see http://mindprod.com/jgloss/console.html

You just emit a string of linefeeds.

 

[Roedy Green]

java.io.IOException: Cannot run program "cls": CreateProcess error=2,

cls is not a program. It is a an internal command to the command
processor.

You must spawn a command processor with cls as a parameter. However,
than is not a platform independent way to solve you problem.

see http://mindprod.com/jgloss/exec.html

 

[AimsLife]

Thanks, all!

Regards,
-aimslife
..