在同一个类的另一个方法中调用一个方法 [英] Calling a method inside another method in same class

问题描述

Bruce Eckel在他的"Thinking in Java，4th Ed."的第428页(有关类型信息的章节)中，具有以下示例:

In page 428 (the chapter about Type Information) of his "Thinking In Java, 4th Ed.", Bruce Eckel has the following example:

public class Staff extends ArrayList<Position> {
    public void add(String title, Person person) {
        add(new Position(title, person));
    }
/* rest of code snipped */

也许我有点累，但是我看不到add()方法中对add()的调用是如何工作的.我一直认为它应该有一个引用，或者是一个静态方法(并且我在ArrayList或List中找不到静态add()).我想念什么?

Maybe I'm a bit tired, but I can't see how the call to add() inside the add() method works. I keep thinking that it should have a reference, or be a static method (and I can't find a static add() in ArrayList or List). What am I missing?

我刚刚为自己进行了测试，发现这可行:

I just tested for myself, and found that this works:

// Test2.java
public class Test2 {
    public void testMethod() {
        testMethod2();
    }

    public void testMethod2() {
        System.out.println("Here");
    }

    public static void main(String[] args) {
        Test2 t = new Test2();
        t.testMethod();
    }
}

推荐答案

对于这样的方法，Java隐式假定对当前对象的引用.所以

Java implicitly assumes a reference to the current object for methods called like this. So

// Test2.java
public class Test2 {
    public void testMethod() {
        testMethod2();
    }

    // ...
}

与

// Test2.java
public class Test2 {
    public void testMethod() {
        this.testMethod2();
    }

    // ...
}

我希望使用第二个版本来更清楚地说明您要做什么.

I prefer the second version to make more clear what you want to do.

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