学习内容:设计并实现加法器类 Adder 代码示例: package 实验三; import java.util.Scanner; public class Adder { private int num; public Adder(int a) { num=a; System.out.println("Adder Constructor run"); } public void setNum(int num) { this.num=num; } public final int ge…
1.享元模式: 1.共享元素模式,也就是说:一个系统中如果有多处用到了相同的一个元素,那么我们应该只存储一份此元素,而让所有地方都引用这一个元素. 2.Java中String就是根据享元模式设计的,而那个存储元素的地方就叫做 "字符串常量池--String Pool". public class A…
学习任务:设计并实现大数类 BigNum 代码示例: import java.util.Scanner; public class BigNum { private double num; public BigNum(double c) { num=c; System.out.println("BigNum Constructorrun"); } public void setNum(double c) { num=c; } public final double getNum() {…
var test = "Class01"; function Class01(privateValue, publicValue) { var _this = this; if (this.constructor.name !== 'Class01') { throw new Error('类只能被实例化'); } /*统计实例化次数的自执行函数*/ (function newClass() { Class01.count++; /*统计实例化的次数*/ Class01.intance…
0down votefavorite I have created a Database Abstraction Layer over PDO to refrain from creating multiple queries around my scripts which would be pretty hard to maintain. My DBAL is not very broad; It takes care of simple tasks such as INSERTING,…
