manyobjects.java

来自「thinking in patterns」· Java 代码 · 共 31 行

//: flyweight:ManyObjects.java

class DataPoint {
  private static int count = 0;
  private int id = count++;
  private int i;
  private float f;
  public int getI() { return i; }
  public void setI(int i) { this.i = i; }
  public float getF() { return f; }
  public void setF(float f) { this.f = f; }
  public String toString() {
    return "id: " + id + ", i = " + i + ", f = " + f;
  }
}

public class ManyObjects {
  static final int size = 1000000;
  public static void main(String[] args) {
    DataPoint[] array = new DataPoint[size];
    for(int i = 0; i < array.length; i++)
      array[i] = new DataPoint();
    for(int i = 0; i < array.length; i++) {
      DataPoint dp = array[i];
      dp.setI(dp.getI() + 1);
      dp.setF(47.0f);
    }
    System.out.println(array[size -1]);
  }
} ///:~