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// Create a process and pipe data through it. waitFor() the process
// in a different thread than the one that created it.
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
public class Process_3 implements Runnable
{
Process p;
public void run()
{
try
{
Runtime r = Runtime.getRuntime();
String[] a = { "sed", "-e", "s/Hello/Goodbye/" };
synchronized (this)
{
p = r.exec(a);
this.notifyAll();
}
OutputStream os = p.getOutputStream();
PrintStream ps = new PrintStream(os);
ps.println("Hello World");
ps.close();
}
catch (Exception ex)
{
System.out.println(ex.toString());
System.exit(1);
}
}
public static void main(String[] args)
{
try
{
Process_3 p3 = new Process_3();
Thread t = new Thread(p3);
t.start();
synchronized (p3)
{
while (p3.p == null)
p3.wait();
}
InputStream is = p3.p.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String result = br.readLine();
if (! "Goodbye World".equals(result))
{
System.out.println("bad 1");
return;
}
result = br.readLine();
if (result != null)
{
System.out.println("bad 2");
return;
}
int c = p3.p.waitFor();
System.out.println(c == 0 ? "ok" : "bad 3");
}
catch (Exception ex)
{
System.out.println(ex.toString());
}
}
}
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