libjava/testsuite/libjava.lang/Process_1.java

   1 // Create a process and read from its standard output.
   2 //
   3 import java.io.BufferedReader;
   4 import java.io.InputStream;
   5 import java.io.InputStreamReader;
   6
   7
   8 public class Process_1
   9 {
  10   public static void main(String[] args)
  11   {
  12     try
  13       {
  14         Runtime r = Runtime.getRuntime();
  15         String s = "Hello World";
  16         String[] a = { "echo", s };
  17         Process p = r.exec(a);
  18         InputStream is = p.getInputStream();
  19         InputStreamReader isr = new InputStreamReader(is);
  20         BufferedReader br = new BufferedReader(isr);
  21         String result = br.readLine();
  22         if (! s.equals(result))
  23           {
  24             System.out.println("bad 1");
  25             return;
  26           }
  27         result = br.readLine();
  28         if (result != null)
  29           {
  30             System.out.println("bad 2");
  31             return;
  32           }
  33         int c = p.waitFor();
  34         System.out.println(c == 0 ? "ok" : "bad 3");
  35       }
  36     catch (Exception ex)
  37       {
  38         System.out.println(ex.toString());
  39       }
  40   }
  41 }