public class ConcretePrototype implements Cloneable {
  String name;
  public ConcretePrototype(String name) {
    this.name = name;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }

  public Object clone() throws CloneNotSupportedException  {
    return super.clone();
  }
}

public class Client {
  public static void main(String[] args) {
    try {
      ConcretePrototype tanaka = new ConcretePrototype("tanaka");
      ConcretePrototype hirokazu = new ConcretePrototype("hirokazu");

      ConcretePrototype[] clones = new ConcretePrototype[10];
      for (int i=0;i<clones.length;i++) {
        if (i % 2 == 0) {
          clones[i] = (ConcretePrototype)tanaka.clone();
        } else {
          clones[i] = (ConcretePrototype)hirokazu.clone();
        }
      }
      // 表示
      for (int i=0;i<clones.length;i++) {
        System.out.println(clones[i].getName());
      }
    } catch (CloneNotSupportedException e) {
      e.printStackTrace();
    }
  }
}

C:\JavaHello\Prototype>java Client
tanaka
hirokazu
tanaka
hirokazu
tanaka
hirokazu
tanaka
hirokazu
tanaka
hirokazu

C:\JavaHello\Prototype>