Go学习第五天

Golang中面向对象类的表示与封装

package mainimport "fmt"// 如果类名首字母大写，表示其他包也能够访问
type Hero struct {// 如果类的属性首字母大写，表示该属性是对外能够访问的，否则的话只能够类的内部访问Name  stringAd    intLevel int
}
/*
func (this Hero) GetName() {fmt.Println("Name = ", this.Name)
}func (this Hero) SetName(newName string) {// this 是调用该方法的对象的一个副本（拷贝）this.Name = newName
}func (this Hero) Show() {fmt.Println("Name = ", this.Name)fmt.Println("Ad = ", this.Ad)fmt.Println("Level = ", this.Level)
}*/func (this *Hero) GetName() {fmt.Println("Name = ", this.Name)
}func (this *Hero) SetName(newName string) {// 此时，this就不是副本而是一个指针this.Name = newName
}func (this *Hero) Show() {fmt.Println("Name = ", this.Name)fmt.Println("Ad = ", this.Ad)fmt.Println("Level = ", this.Level)
}func main() {hero := Hero{Name:  "大将军",Ad:    111,Level: 10,}hero.Show()fmt.Println("========================")hero.SetName("小将军")hero.Show()}

Golang中面相对象继承

package mainimport "fmt"// 定义父类
type Human struct {name stringsex  string
}func (this *Human) Eat() {fmt.Println("Human.Eat()...")
}func (this *Human) Walk() {fmt.Println("Human.Walk()...")
}
// ============================type SuperMan struct {Human // SuerMan类型继承Human类方法level int
}// 重定义父类的方法Eat()
func (this *SuperMan) Eat() {fmt.Println("SuperMan.Eat()...")
}func (this *SuperMan) Fly() {fmt.Println("SuperMan.Fly()...")
}func (this *SuperMan) PrintMan() {fmt.Println("name = ", this.name)fmt.Println("sex = ", this.sex)fmt.Println("level = ", this.level)
}func main() {h := Human{"张三", "男"}h.Eat()h.Walk()fmt.Println("=====================")//s := SuperMan{Human{"李四","女",},11,}var s SuperMans.name = "李四"s.sex = "女"s.level = 11s.Walk() // 父类的方法s.Eat()  // 子类的方法s.Fly()  // 子类的方法fmt.Println("=====================")s.PrintMan()}

Golang中面向对象多态的实现与基本要素

package mainimport "fmt"// 本质是一个指针
type AnimalIF interface {Sleep()           // 让动物睡觉GetColor() string // 获取动物的颜色GetType() string  // 获取动物的类型
}// ===============================
// 具体的类
type Cat struct {color string
}
func (this *Cat) Sleep() {fmt.Println("Cat is Sleep")
}
func (this *Cat) GetColor() string {return this.color
}
func (this *Cat) GetType() string {return "Cat"
}// ===============================
// 具体的类
type Dog struct {color string
}
func (this *Dog) Sleep() {fmt.Println("Dog is Sleep")
}
func (this *Dog) GetColor() string {return this.color
}
func (this *Dog) GetType() string {return "Dog"
}// ===============================func showAnimal(animal AnimalIF)  {animal.Sleep()fmt.Println("color = ", animal.GetColor())fmt.Println("type = ", animal.GetType())
}func main() {//var animal AnimalIF // 接口的数据类型，父类指针////animal = &Cat{"Green"}//animal.Sleep() // 调用的就是Cat的Sleep()方法////animal = &Dog{"Yellow"}//animal.Sleep() // 调用的就是Dog的Sleep()方法cat := Cat{"Green"}showAnimal(&cat)fmt.Println("-----")dog := Dog{"Yellow"}showAnimal(&dog)fmt.Println("-----")
}