Java 在另一个内部调用构造函数
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Java calling constructor within another
提问by Anshin
could someone help me with calling the first constructor and putting it in the second and third? I may have some problems with the syntax, it seems...
有人可以帮我调用第一个构造函数并将其放在第二个和第三个中吗？我的语法可能有一些问题，似乎......
采纳答案by DaoWen
Your linked example is really long and I'm getting confused by all the non-English comments, so I'll just give you a short example. If you want to call another constructor within a constructor, you just use the thiskeyword. Here's a sample class that uses thisto delegate the work of the "default" (no-arg) constructor to a 1-arg constructor:
你链接的例子真的很长，我对所有非英语评论感到困惑，所以我只给你一个简短的例子。如果要在构造函数中调用另一个构造函数，只需使用this关键字。这是一个示例类，用于this将“默认”（无参数）构造函数的工作委托给 1-arg 构造函数：
public class MyClass {
public final int X;
public MyClass() {
this(1); // Use X=1 by default
}
public MyClass(int x) {
X = x;
}
}
This technique is covered in Using the thisKeyword: Using thiswith a Constructorin Oracle's Java Tutorials.
在 Oracle 的 Java 教程中使用this关键字：this与构造函数一起使用中介绍了此技术。
