testb.java

来自「JAVA编程百例书中各章节的所有例子的源代码,包括套接字编程」· Java 代码 · 共 39 行

package ch10.section02;

public class TestB {
  public static void main(String[] args) {
    SingletonB instance1 = SingletonB.GetInstance("Sub1");
    if (instance1 == null) {
      System.out.println("There is no such instance in registry !");
    }
    else {
      System.out.println(instance1.getClass());
    }

    try {
      SingletonB instance2 = new SubSingletonB();
      System.out.println("We had created a new instance named \"Sub1\" now");
    }
    catch (SingletonException e) {
      System.out.println(e.getMessage());
    }

    instance1 = SingletonB.GetInstance("Sub1");
    if (instance1 == null) {
      System.out.println("There is no such instance in registry !");
    }
    else {
      System.out.println(instance1.getClass());
    }

    try {
      SingletonB instance3 = new SubSingletonB();
      System.out.println("We had created a new instance named \"Sub1\" now");
    }
    catch (SingletonException e) {
      System.out.println(e.getMessage());
    }

  }
}