Git init

.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.idea
+*.iml
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
+
+### Builds ###
+app.jar

MANIFEST.mf

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+Manifest-Version: 1.0
+Created-By: zinch
+Main-class: Main

Makefile

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+all:
+	rm -rf target
+	javac -d target -sourcepath src src/Main.java src/**/*
+	cd target; jar cfm app.jar ../MANIFEST.mf *.class ./**/*.class
+	mv target/app.jar ./
+	rm -rf target

src/Characters/Character.java

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+package Characters;
+
+import Entity.*;
+
+import java.util.Objects;
+
+public abstract class Character extends Entity {
+  private final Gender gender;
+
+  public Character(String name, Gender gender) {
+    this.name = name;
+    this.gender = gender;
+  }
+
+  public final String getGender() {
+    switch (this.gender) {
+      case MAN -> {
+        return "Он";
+      }
+      case WOMAN -> {
+        return "Она";
+      }
+      default -> {
+        return "";
+      }
+    }
+  }
+
+  public abstract String feel();
+  public abstract String grab(IGrabbable obj);
+  public abstract String moveTo(Entity obj);
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    Character character = (Character) o;
+    return Objects.equals(this.name, character.name) && this.gender == character.gender;
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(this.name, this.gender);
+  }
+}

src/Characters/FrenBok.java

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+package Characters;
+
+import Entity.*;
+import Items.Item;
+
+public class FrenBok extends Character {
+  public FrenBok() {
+    super("Фрекен Бок", Gender.WOMAN);
+  }
+
+  @Override
+  public String moveTo(Entity obj) {
+    return String.format("%s кинулась на %s", this.getGender(), obj);
+  }
+
+  @Override
+  public String feel() {
+    return String.format("%s взревела от бешенства", this);
+  }
+
+  @Override
+  public String grab(IGrabbable obj) {
+    return String.format("%s взяла %s", this.getGender(), obj);
+  }
+
+  public String grabCharacter(IGrabbableCharacter character) {
+    return String.format("%s схватила %s за %s", this.getGender(), character.getName(), character.getGrabbablePart());
+  }
+
+  public String pushCharacterBehindItem(Character character, Item item) {
+    return String.format("%s вытолкнула %s за %s", this.getGender(), character, item);
+  }
+}

src/Characters/Gender.java

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+package Characters;
+
+public enum Gender {
+  MAN,
+  WOMAN
+}

src/Characters/IGrabbableCharacter.java

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+package Characters;
+
+import Entity.IGrabbable;
+
+public interface IGrabbableCharacter extends IGrabbable {
+  String getGrabbablePart();
+}

src/Characters/Karlson.java

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+package Characters;
+
+import Entity.*;
+import Items.Container;
+
+public class Karlson extends Character implements IGrabbableCharacter {
+  public Karlson() {
+    super("Кралсон", Gender.MAN);
+  }
+
+  @Override
+  public String feel() {
+    return String.format("%s дрогнул губой и надулся", this);
+  }
+
+  @Override
+  public String moveTo(Entity obj) {
+    return String.format("%s сделал шаг к %s", this.getGender(), obj);
+  }
+
+  @Override
+  public String grab(IGrabbable obj) {
+    return String.format("%s взял %s", this, obj);
+  }
+
+  public String grabFrom(Container container) {
+    return String.format("%s взял одну %s из %s", this.getGender(), container.getInnerItem(), container);
+  }
+
+  @Override
+  public String getGrabbablePart() {
+    return "шиворот";
+  }
+}

src/Entity/Entity.java

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+package Entity;
+
+import java.util.Objects;
+
+public abstract class Entity {
+  protected String name;
+  public final String getName() {
+    return this.name;
+  }
+
+  @Override
+  public String toString() {
+    return this.name;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    Entity entity = (Entity) o;
+    return Objects.equals(name, entity.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name);
+  }
+}

src/Entity/IGrabbable.java

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+package Entity;
+
+public interface IGrabbable {
+  String getName();
+}

src/Items/Container.java

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+package Items;
+
+import java.util.Objects;
+
+public class Container extends Item {
+  private final Item innerItem;
+
+  public Container(String name, Item item) {
+    super(name);
+    this.innerItem = item;
+  }
+
+  public Item getInnerItem() {
+    return this.innerItem;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    if (!super.equals(o)) return false;
+    Container container = (Container) o;
+    return Objects.equals(innerItem, container.innerItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(super.hashCode(), innerItem);
+  }
+}

src/Items/Item.java

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+package Items;
+
+import Entity.*;
+
+import java.util.Objects;
+
+public class Item extends Entity implements IGrabbable {
+  public Item(String name) {
+    this.name = name;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    Item item = (Item) o;
+    return Objects.equals(this.name, item.name);
+  }
+}

src/Main.java

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+import Characters.FrenBok;
+import Characters.Karlson;
+import Items.Container;
+import Items.Item;
+
+public class Main {
+  public static void main(String[] args) {
+    // Персонажи
+    Karlson karlson = new Karlson();
+    FrenBok frenBok = new FrenBok();
+
+    // Предметы
+    Item kitchenHob = new Item("плита");
+    Item meatball = new Item("тефтелька");
+    Container fryingPan = new Container("сковородка", meatball);
+    Item door = new Item("дверь");
+
+    System.out.println(karlson.feel() + '.');
+    System.out.println(karlson.moveTo(kitchenHob) + '.');
+    System.out.println(karlson.grabFrom(fryingPan) + '.');
+    System.out.println("Вот этого ему не следовало делать.");
+    System.out.println(frenBok.feel() + '.');
+    System.out.println(frenBok.moveTo(karlson) + '.');
+    System.out.println(frenBok.grabCharacter(karlson) + '.');
+    System.out.println(frenBok.pushCharacterBehindItem(karlson, door) + '.');
+  }
+}