CODEWITHSUNDEEP
java
Jerry Lum
Jerry Lum

Reputation: 33

Process, How to use Outputstream to send the message two times

This is my code:

Process p=Runtime.getRuntime().exec("something command"); 

String s;

JFrame frame = new JFrame();
frame.setSize(600, 400);
JTextField A = new JTextField();
A.addActionListener(new ActionListener(){

@Override
public void actionPerformed(ActionEvent e) {
    String s = A.getText();
    System.out.println("I send a text: " + s);
    try{
         p.getOutputStream().write(s.getBytes());
         p.getOutputStream().close();
    }catch(Exception ex){
        ex.printStackTrace();
    }
    A.setText("");
}    
});
frame.add(A);
frame.setVisible(true);


// Read command standard input
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((s = stdInput.readLine()) != null) {
   System.out.println(s);
}

I want to use p.getOutputStream() to send the message two times, but the problem is I need to close the OutputStream to send. I can't send again because it have been closd. Can I reconnect the OutputStream or no need to close the OutputStream?

Thx:)

Upvotes: 0

Views: 540

Answers (1)

Elliott Frisch
Elliott Frisch

Reputation: 201447

Instead of calling close(), you can call flush() which flushes this output stream and forces any buffered output bytes to be written out. Then you can close(), after you've written your messages the desired number of times.

Upvotes: 1

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