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       }
  34   }
  35
  36   public static void main(String[] args)
  37   {
  38     try
  39       {
  40         Process_3 p3 = new Process_3();
  41         Thread t = new Thread(p3);
  42         t.start();
  43         synchronized (p3)
  44           {
  45             while (p3.p == null)
  46               p3.wait();
  47           }
  48
  49         InputStream is = p3.p.getInputStream();
  50         InputStreamReader isr = new InputStreamReader(is);
  51         BufferedReader br = new BufferedReader(isr);
  52         String result = br.readLine();
  53         if (! "Goodbye World".equals(result))
  54           {
  55             System.out.println("bad 1");
  56             return;
  57           }
  58         result = br.readLine();
  59         if (result != null)
  60           {
  61             System.out.println("bad 2");
  62             return;
  63           }
  64         int c = p3.p.waitFor();
  65         System.out.println(c == 0 ? "ok" : "bad 3");
  66       }
  67     catch (Exception ex)
  68       {
  69         System.out.println(ex.toString());
  70       }
  71   }
  72 }