“这个”之间的差异和"超级" Java中的关键字

问题描述：

关键字此和超级之间有什么区别？

What is the difference between the keywords this and super?

两者都用于访问类的构造函数吗？您能否解释一下？

Both are used to access constructors of class right? Can any of you explain?

答

让我们考虑一下这种情况

Lets consider this situation

class Animal {
  void eat() {
    System.out.println("animal : eat");
  }
}

class Dog extends Animal {
  void eat() {
    System.out.println("dog : eat");
  }
  void anotherEat() {
    super.eat();
  }
}

public class Test {
  public static void main(String[] args) {
    Animal a = new Animal();
    a.eat();
    Dog d = new Dog();
    d.eat();
    d.anotherEat();
  }
}

输出将是

animal : eat
dog : eat
animal : eat

第三行是打印animal：eat因为我们正在调用 super.eat（）。如果我们调用 this.eat（），它将打印为dog：eat。

The third line is printing "animal:eat" because we are calling super.eat(). If we called this.eat(), it would have printed as "dog:eat".

“这个”之间的差异和"超级" Java中的关键字

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