libjava/testsuite/libjava.lang/Process_3.java

   1 // Create a process and pipe data through it.  waitFor() the process
   2 // in a different thread than the one that created it.
   3 import java.io.BufferedReader;
   4 import java.io.InputStream;
   5 import java.io.InputStreamReader;
   6 import java.io.OutputStream;
   7 import java.io.PrintStream;
   8
   9
  10 public class Process_3 implements Runnable
  11 {
  12   Process p;
  13
  14   public void run()
  15   {
  16     try
  17       {
  18         Runtime r = Runtime.getRuntime();
  19         String[] a = { "sed", "-e", "s/Hello/Goodbye/" };
  20         synchronized (this)
  21           {
  22             p = r.exec(a);
  23             this.notifyAll();
  24           }
  25         OutputStream os = p.getOutputStream();
  26         PrintStream ps = new PrintStream(os);
  27         ps.println("Hello World");
  28         ps.close();
  29       }
  30     catch (Exception ex)
  31       {
  32         System.out.println(ex.toString());
  33         System.exit(1);
  34       }
  35   }
  36
  37   public static void main(String[] args)
  38   {
  39     try
  40       {
  41         Process_3 p3 = new Process_3();
  42         Thread t = new Thread(p3);
  43         t.start();
  44         synchronized (p3)
  45           {
  46             while (p3.p == null)
  47               p3.wait();
  48           }
  49
  50         InputStream is = p3.p.getInputStream();
  51         InputStreamReader isr = new InputStreamReader(is);
  52         BufferedReader br = new BufferedReader(isr);
  53         String result = br.readLine();
  54         if (! "Goodbye World".equals(result))
  55           {
  56             System.out.println("bad 1");
  57             return;
  58           }
  59         result = br.readLine();
  60         if (result != null)
  61           {
  62             System.out.println("bad 2");
  63             return;
  64           }
  65         int c = p3.p.waitFor();
  66         System.out.println(c == 0 ? "ok" : "bad 3");
  67       }
  68     catch (Exception ex)
  69       {
  70         System.out.println(ex.toString());
  71       }
  72   }
  73 }