Topic: 小弟初学JAVA,希望有哪位仁义大哥赐教. (如何使用this来使构造方法覆盖?) |
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1.小弟初学JAVA,希望有哪位仁义大哥赐教. (如何使用this来使构造方法覆盖?) | Copy to clipboard |
Posted by: LLL_QQQ Posted on: 2004-09-13 15:31 import java.io.* public class Student(){ String name1,name2; int age; public Student(String s1,String s2 ,int n){ name1=s1; name2=s2; age=n; } public Student (String s1,String s2;){ this(s1,s2,20); } public Student(){ this("Unknown"); } public static void main(String[] args){ Student s=new Student; System.out.println(s.name1+s.name2+s.age); } } 如何使用this来使构造方法覆盖?(这个程序如何改?) :) |
2.Re:小弟初学JAVA,希望有哪位仁义大哥赐教. (如何使用this来使构造方法覆盖?) [Re: LLL_QQQ] | Copy to clipboard |
Posted by: why Posted on: 2004-09-13 17:34 Why would you think you should use this? Can't it be import java.io.* public class Student(){ String name1,name2; int age; public Student(String s1, String s2, int n){ name1=s1; name2=s2; age=n; } public Student (String s1,String s2){ name1=s1; name2=s2; age=20; } public Student(){ name1="Unknown"; // name2=null; // age=0; } public static void main(String[] args){ Student s=new Student; System.out.println(s.name1+s.name2+s.age); } } If you want to use a method to initialize the object, just add a private method to do so private setDefault(String s1,String s2 ,int n) { //... } |
3.Re:小弟初学JAVA,希望有哪位仁义大哥赐教. (如何使用this来使构造方法覆盖?) [Re: LLL_QQQ] | Copy to clipboard |
Posted by: LLL_QQQ Posted on: 2004-09-13 18:55 非常感谢总版主!小弟清楚了 ^_^ |
4.Re:小弟初学JAVA,希望有哪位仁义大哥赐教. (如何使用this来使构造方法覆盖?) [Re: LLL_QQQ] | Copy to clipboard |
Posted by: alpacino Posted on: 2004-09-21 16:54 构造函数不能被继承,所以也不存在构造函数重置这一说 |
5.Re:小弟初学JAVA,希望有哪位仁义大哥赐教. (如何使用this来使构造方法覆盖?) [Re: LLL_QQQ] | Copy to clipboard |
Posted by: april518 Posted on: 2004-09-24 16:46 this 指代所创建的对象,未创建对象之前何来的this呢?随便说说不知道对不对,见笑见笑了! |
6.Re:小弟初学JAVA,希望有哪位仁义大哥赐教. (如何使用this来使构造方法覆盖?) [Re: LLL_QQQ] | Copy to clipboard |
Posted by: LLL_QQQ Posted on: 2004-09-25 02:02 谢谢大家! |
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