非静态实例初始化（Mugs.java）

bob.bee

package com.bobbee;
class Mug
{
  public Mug(int marker)
  {
    System.out.println("Mug(" + marker + ")");
  }
  void f(int marker) {
    System.out.println("f(" + marker + ")");
  }
}
public class Mugs
{
  Mug mug1;
  Mug mug2;
  {
    mug1 = new Mug(1);
    mug2 = new Mug(2);
    System.out.println("mug1 & mug2 initialized");
  }
  public Mugs() {
      System.out.println("Mugs()");
  }
  public Mugs(int i) {
      System.out.println("Mugs(int)");
  }
  public static void main(String[] args)
  {
    System.out.println("Inside main()");
    new Mugs();
    System.out.println("new Mugs() completed");
    new Mugs(1);
    System.out.println("new Mugs(1) completed");
  }
} /* Output:
*///:~
最后的输出为：
Inside main()Mug(1)Mug(2)mug1 & mug2 initializedMugs()new Mugs() completedMug(1)Mug(2)mug1 & mug2 initializedMugs(int)new Mugs(1) completed


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