单例模式测试类

public class SingletonTest {

  private int value;
  private static SingletonTest instance;。
  private SingletonTest(){
    System.out.println("正在执行构造器。。。");
  }
  public static SingletonTest getInstance(){
    if(instance==null){
      instance=new SingletonTest();
    }
    return instance;
  }
  public int getValue() {
    return value;
  }
  public void setValue(int value) {
    this.value = value;
  }

  public static void main(String[]args){
    SingletonTest t1=SingletonTest.getInstance();
    SingletonTest t2=SingletonTest.getInstance();
    t2.setValue(1);
    System.out.println(t1==t2);
  }

}