typescript 如何在一个类中实现多个接口？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/46075181/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
提示：将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间：2020-10-21 04:52:12 来源:igfitidea点击:
How do I implement multiple interfaces in a class?
提问by Kewin Dousse
I want to implement both the interfaces in the generic class. How do I do that?
我想在泛型类中实现这两个接口。我怎么做？
interface first {
name: string,
age: number
}
interface second {
product: string,
available: boolean,
amount: number
}
class generics <T>{
}
回答by Kewin Dousse
Use a ,to separate the interfaces you want to implement. That gives the following class declaration :
使用 a,分隔要实现的接口。这给出了以下类声明：
class generics <T> implements first, second
Here is the complete code :
这是完整的代码：
interface first {
name: string,
age: number
}
interface second {
product: string,
available: boolean,
amount: number
}
class generics <T> implements first, second {
name: string;
age: number;
product: string;
available: boolean;
amount: number;
}
回答by Joshua Samuel
create a specific type in multiple classes with interface.
在具有接口的多个类中创建特定类型。
interface Calculated{
calculate(input1: number,input2: number): void;
}
class Add implements Calculated{ //addition class
calculate(input1: number, input2: number){
console.log("The Addition of" + " " + input1 + "+" + input2 + "=" + (input1 + input2));
}
}
class Subtract implements Calculated{ //subtraction class
calculate(input1: number, input2: number){
console.log("The subtraction of" + " " + input1 + "-" + input2 + "=" + (input1 - input2));
}
}
class Mulitiple implements Calculated{ //multiplication class
calculate(input1: number, input2: number){
console.log("The multiplication of" + " " + input1 + "*" + input2 + "=" + (input1 * input2));
}
}
class Divide implements Calculated{ //division class
calculate(input1: number, input2: number){
console.log("The division of" + " " + input1 + "/" + input2 + "=" + (input1 / input2));
}
}
class Calculator{ //calculator
input1: number;
input2: number;
condition: Calculated; //interface type specification
constructor (input1: number, input2: number, condition: Calculated) {
this.input1 = input1;
this.input2 = input2;
this.condition = condition;
const operateObj = this.condition;
operateObj.calculate(this.input1,this.input2);
}
}
//calculator calling....
const calculatorObj = new Calculator(100, 75.0,new Add); //(it should be input1 & input2 & like to you perform)
// if you need addition use Add
// if you need subtraction use Subtract
// if you need multiplication use Mulitiple
// if you need division use Divide
