public class Puppy { public voidpuppy(String name) { System.out.println("我的小狗名字是:"+name); } public static void main(String[] args) { // TODO Auto-generated method stub Puppy dognamePuppy= new Puppy(); dognamePuppy.puppy("Tony"); } }
#include <iostream> using namespace std; class A { int a; public: A(int i) { a = i; cout<<"A Constructor"<<endl; } void disp() { cout<<"a="<<a<<endl; } }; class B { int b; public: B(int i) { b = i; cout<<"B Constructor"<<endl; } void disp() { cout<<"...
public class persontext { public static void main(String[] args) { person b=new person(17,"tom"); //b.setAge(12); String d=b.getName(); int c=b.getAge(); System.out.println(c); System.out.println(d); } } 这里就运用到了构造器,创建了一个构造器,通过构造器创建对象并且对对象完成...
functionhello(name){return'Hello '+name+'!';}// Function invocationconstmessage=hello('World'); hello('World')就是一个函数直接调用:hello可以解析成一个函数对象,紧跟着是用括号括起来的World参数。 函数直接调用和通过对象属性obj.myFunc()是不同的,它叫做方法调用method invocation(后边介绍的第2种类型)...
// bark methodbark:function(){console.log("Woof!"); } }; // access methoddog.bark(); // Output: Woof! Run Code In the above example, thedogobject has two keys:nameandbark. Since thebarkkey holds a function, we refer to it as amethod. ...
Within an instance method or a constructor, this is a reference to the current object— the object whose method or constructor is being called. You can refer to any member of the current object from within an instance method or a constructor by using this. Using this with a Field The ...
class Planet { constructor(name) { this.name = name; } getName() { console.log(this === earth); // => true return this.name; } } const earth = new Planet('Earth'); // method invocation. the context is earth earth.getName(); // => 'Earth' 2.2 陷阱:将对象中的方法抽离 ...
importjava.util.*;publicclassBookTest{publicstaticvoidmain(String[] args){//Book book = new Book("A Tale of Two Cities", 1895);Bookbook=newBook("A Tale of Two Cities"); System.out.println(book.title); System.out.println(book.pubYear); ...
The "this" keyword in Java is used as a reference to the current object, within an instance method or a constructor. Yes, you can call methods using it. But, you should call them only from instance methods (non-static). Example In the following example, the Student class has a private...
Constructor Instances of classes are constructed by a special method of the class, usually of the same name as the class, called aconstructor. This methodâs explicit job is to initialize any information (state) the instance will need. ...