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public class SingleObject { private static SingleObject instance = new SingleObject(); private SingleObject() { } public static SingleObject getInstance() { return instance; } public void showMessage() { System.out.println("?????????" + instance); } } ?????????????
public class SingletonPatternDemo { public static void main(String[] args) { for (int i = 0; i < 3; i++) { SingleObject instance = SingleObject.getInstance(); instance.showMessage(); } } } ?????????????????
com.freedom.pattern.singleton.SingleObject@47089e5f com.freedom.pattern.singleton.SingleObject@47089e5f com.freedom.pattern.singleton.SingleObject@47089e5f
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