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test/java/util/HashSet/Serialization.java

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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.ByteArrayInputStream;
  25 import java.io.ByteArrayOutputStream;
  26 import java.io.IOException;
  27 import java.io.ObjectInputStream;
  28 import java.io.ObjectOutputStream;
  29 import java.util.HashSet;
  30 import java.util.Random;
  31 import java.util.concurrent.ThreadLocalRandom;
  32 
  33 /*
  34  * @test
  35  * @bug 8016252
  36  * @summary Verify that a serialized HashSet may successfully be deserialized.

  37  */
  38 public class Serialization {
  39 
  40     private static final int NUM_SETS = 43;
  41     private static final int MAX_CAPACITY = 257;
  42     private static final float MAX_LOAD_FACTOR = 100.0F;
  43 
  44     private static final Random rnd = ThreadLocalRandom.current();
  45 
  46     private static HashSet<Integer> createHashSet() {
  47         int capacity = rnd.nextInt(MAX_CAPACITY);
  48         float loadFactor = Float.MIN_VALUE + rnd.nextFloat()*MAX_LOAD_FACTOR;
  49         HashSet<Integer> hashSet = new HashSet<Integer>(capacity, loadFactor);
  50         float multiplier = 2*rnd.nextFloat(); // range [0,2]
  51         int size = (int)(capacity*loadFactor*multiplier);
  52         for (int i = 0; i < size; i++) {
  53             hashSet.add(rnd.nextInt());
  54         }
  55         return hashSet;
  56     }




  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.ByteArrayInputStream;
  25 import java.io.ByteArrayOutputStream;
  26 import java.io.IOException;
  27 import java.io.ObjectInputStream;
  28 import java.io.ObjectOutputStream;
  29 import java.util.HashSet;
  30 import java.util.Random;
  31 import java.util.concurrent.ThreadLocalRandom;
  32 
  33 /*
  34  * @test
  35  * @bug 8016252
  36  * @summary Verify that a serialized HashSet may successfully be deserialized.
  37  * @key randomness
  38  */
  39 public class Serialization {
  40 
  41     private static final int NUM_SETS = 43;
  42     private static final int MAX_CAPACITY = 257;
  43     private static final float MAX_LOAD_FACTOR = 100.0F;
  44 
  45     private static final Random rnd = ThreadLocalRandom.current();
  46 
  47     private static HashSet<Integer> createHashSet() {
  48         int capacity = rnd.nextInt(MAX_CAPACITY);
  49         float loadFactor = Float.MIN_VALUE + rnd.nextFloat()*MAX_LOAD_FACTOR;
  50         HashSet<Integer> hashSet = new HashSet<Integer>(capacity, loadFactor);
  51         float multiplier = 2*rnd.nextFloat(); // range [0,2]
  52         int size = (int)(capacity*loadFactor*multiplier);
  53         for (int i = 0; i < size; i++) {
  54             hashSet.add(rnd.nextInt());
  55         }
  56         return hashSet;
  57     }


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