package studyjava; public class TGD { public static void main(String[] args) { // GiantDragos dragos = new GiantDragos(); GiantDragos dragos = GiantDragos.getInstance(); GiantDragos dragos2 = GiantDragos.getInstance(); //都是同一个对象 System.out.println(dragos == dragos2); GD gd = GD.getGtest(); GD gd2 = GD .getGtest(); System.out.println(gd==gd2); } }