3、thiskeyword thiskeyword可用于在不论什么实例方法内指向当前对象,也可指向对其调用当前方法的对象,或者在须要当前类型对象引用时使用。 注:当一个类的属性名或成员变量与訪问该属性的方法參数名同样时,则须要使用thiskeyword来訪问类中的属性。以区分类的属性和方法中的參数。 4、superkeyword 因为子类不能继承父...
Java - 'this' Reference (or, Object)In Java, this is an Object which holds the Reference of another Object which invokes the member function.Example without using 'this' Reference in Javaimport java.util.Scanner; class ThisKeyword { private int a; private int b; void getData(int a, int...
class Demo { public void getName() { System.out.println("Studytonight"); } public Demo display() { // return current object return this; } public static void main(String[] args) { Demo d = new Demo(); Demo d1 = d.display(); d1.getName(); } } ...
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In this example, theappendandreversemethods both return theStringBuilderExampleobject, allowing them to be chained together in a single expression. In conclusion, thethiskeyword is an important part of Java programming and can be used in a variety of ways to improve the clarity and readability of...
1)通过thiskeyword能够明白的訪问成员变量。解决与局部变量重名的矛盾! (成员变量与局部变量冲突的时候) class Student{ int id; public Student(int id){ this.id=id; } public int getId(){ return this.id; } } 构造方法中的參数是id,它是一个局部变量与成员变量id重名。
[javase学习笔记]-7.6 thiskeyword的原理,这一节我们来讲一个keyword。就是thiskeyword。我们还是通过样例来看吧:classPerson{privateStringname;privateintage;Person(Stringn,inta){name=n;age=a;}public
The most common reason for using the this keyword is because a field is shadowed by a method or constructor parameter. For example, the Point class was written like this public class Point { public int x = 0; public int y = 0; //constructor public Point(int a, int b) { x = a;...
java语言给了keywordthis这个功能,那就是用this调用构造函数,并且也是通过參数不同选择调用不同的构造函数. 我们来看一个样例: classPerson{privateStringname;privateintage;Person()//构造方法1{System.out.println("person run");}Person(Stringname)//构造方法2{this.name=name;}Person(Stringname,intage)//构造...
Java关键字是对Java编译器有特殊含义的字符串,是编译器和程序员的一个约定,程序员利用关键字来告诉编译器其声明的变量类型、类、方法特性等信息。Java语言共定义了如下所示的关键字。本文主要介绍Java this 关键字(keyword)。 Java 关键字 例如: 使用this访问当前实例的属性x: ...