Add code for module 1, part 2, video 7

Author: SvenWoltmann

src/main/java/eu/happycoders/datastructures/module2/p2_lists/v07_empty_lists/EmptyListBenchmark.java

@@ -0,0 +1,24 @@
+package eu.happycoders.datastructures.module2.p2_lists.v07_empty_lists;
+
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+
+import java.util.concurrent.TimeUnit;
+
+@State(Scope.Thread)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+
+@Warmup(iterations = 2, time = 5)
+@Measurement(iterations = 5, time = 5)
+@Fork(1)
+public class EmptyListBenchmark {
+
+
+}

src/main/java/eu/happycoders/datastructures/module2/p2_lists/v07_empty_lists/EmptyListBenchmarkSolution.java

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+package eu.happycoders.datastructures.module2.p2_lists.v07_empty_lists;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Level;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+@State(Scope.Thread)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+
+@Warmup(iterations = 2, time = 5)
+@Measurement(iterations = 5, time = 5)
+@Fork(1)
+public class EmptyListBenchmarkSolution {
+
+  private List<String> list;
+
+  @Param({"ArrayList", "List.of()", "emptyList()"})
+  private String listType;
+
+  @Setup(Level.Trial)
+  public void setup() {
+    list = switch (listType) {
+      case "ArrayList" -> new ArrayList<>();
+      case "List.of()" -> List.of();
+      case "emptyList()" -> Collections.emptyList();
+      default -> throw new IllegalStateException();
+    };
+  }
+
+  @Benchmark
+  public int size() {
+    return list.size();
+  }
+
+  @Benchmark
+  public boolean isEmpty() {
+    return list.isEmpty();
+  }
+
+  @Benchmark
+  public int indexOf() {
+    return list.indexOf("element");
+  }
+
+  @Benchmark
+  public boolean contains() {
+    return list.contains("element");
+  }
+
+  @Benchmark
+  public void iteration(Blackhole blackhole) {
+    for (String s : list) {
+      blackhole.consume(s);
+    }
+  }
+}

src/main/java/eu/happycoders/datastructures/module2/p2_lists/v07_empty_lists/EmptyListsSandbox.java

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+void main() {
+
+
+}