1 files changed, 40 insertions, 0 deletions
diff --git a/Master/Reference Architectures and Patterns/hjp5/examples/Listing4804.java b/Master/Reference Architectures and Patterns/hjp5/examples/Listing4804.java
new file mode 100644
index 0000000..ede4464
--- /dev/null
+++ b/Master/Reference Architectures and Patterns/hjp5/examples/Listing4804.java
@@ -0,0 +1,40 @@
+/* Listing4804.java */
+
+import java.security.*;
+
+public class Listing4804
+{
+  /**
+   * Konvertiert ein Byte in einen Hex-String.
+   */
+  public static String toHexString(byte b)
+  {
+    int value = (b & 0x7F) + (b < 0 ? 128 : 0);
+    String ret = (value < 16 ? "0" : "");
+    ret += Integer.toHexString(value).toUpperCase();
+    return ret;
+  }
+
+  public static void main(String[] args)
+  {
+    try {
+      //Zufallszahlengenerator erstellen
+      SecureRandom rand = SecureRandom.getInstance("SHA1PRNG");
+      byte[] data = new byte[8];
+      //Startwert initialisieren
+      rand.setSeed(0x123456789ABCDEF0L);
+      for (int i = 0; i < 10; ++i) {
+        //Zufallszahlen berechnen
+        rand.nextBytes(data);
+        //Ausgeben
+        for (int j = 0; j < 8; ++j) {
+          System.out.print(toHexString(data[j]) + " ");
+        }
+        System.out.println();
+      }
+    } catch (Exception e) {
+      System.err.println(e.toString());
+      System.exit(1);
+    }
+  }
+}
+\ No newline at end of file