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1 16 package org.apache.juddi.uuidgen; 17 18 import java.io.IOException ; 19 import java.io.BufferedReader ; 20 import java.io.InputStreamReader ; 21 22 28 public final class Win32UUIDGen implements UUIDGen 29 { 30 33 public String uuidgen() 34 { 35 String [] uuids = this.uuidgen(1); 36 return uuids[0]; 37 } 38 39 42 public String [] uuidgen(int nmbr) 43 { 44 String [] uuids = new String [nmbr]; 45 46 try 47 { 48 Runtime r = Runtime.getRuntime(); 49 Process p = r.exec("uuidgen -n" + nmbr); 50 BufferedReader x = new BufferedReader (new InputStreamReader (p.getInputStream())); 51 52 for (int i = 0; i < nmbr; ++i) 53 uuids[i] = x.readLine(); 54 } 55 catch (IOException ex) 56 { 57 ex.printStackTrace(); 58 throw new RuntimeException (ex.getMessage()); 59 } 60 61 return uuids; 62 } 63 64 65 66 67 68 69 70 public static void main(String args[]) 71 { 72 UUIDGen uuidgen = new Win32UUIDGen(); 73 74 long start = System.currentTimeMillis(); 75 76 for (int i = 1; i <= 250; ++i) 78 System.out.println( i + ": " + uuidgen.uuidgen()); 79 80 long end = System.currentTimeMillis(); 81 82 System.out.println("Generation (and display) of 250 UUID's took "+(end-start)+" milliseconds."); 83 84 85 start = System.currentTimeMillis(); 86 87 String [] ids = uuidgen.uuidgen(250); 89 for (int i = 1; i < 250; ++i) 90 System.out.println( i + ": " + ids[i]); 91 92 end = System.currentTimeMillis(); 93 94 System.out.println("Generation (and display) of 250 UUID's took "+(end-start)+" milliseconds."); 95 } 96 } 97
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