关于Java 设计模式 单例模式 Singleton

1、SingleObject.java

package com.ssm.cts.pattern.singleton;

public class SingleObject {
  private static SingleObject instance;

  private SingleObject() {
  }

  public static synchronized SingleObject getInstance() {
    if (instance == null) {
      instance = new SingleObject();
    }
    return instance;
  }

  public void initConfig() {
    System.out.println("初始化配置");
  }
}

2、Demo.java

package com.ssm.cts.pattern.singleton;

public class Demo {
  // 测试
  public static void main(String[] args) {

    SingleObject obj = SingleObject.getInstance();
    obj.initConfig();
  }
}