以下代码的输出结果如何？ [英] What will be the output of this following code
问题描述
package Demo;
import java.util.Scanner;
public class Demo
{
public String name;
public String mobile;
public static void met(Demo[] s)
{
for(Demo d:s)
{
System.out.println(d);
}
}
public String toString()
{
return name+" "+mobile;
}
public static void main(String args[])
{
Demo s[]=new Demo[3];
Scanner demo=new Scanner(System.in);
for(int i=0;i<s.length;i++)
{
s[i]=new Demo();
s[i].name=demo.nextLine();
s[i].mobile=demo.nextLine();
}
met(s);
}
}
我的尝试： < br $>
解释以下代码的输出
What I have tried:
explain the output of the following code
推荐答案
你有什么想法解释代码行吗？按行是？
每一行都需要一段解释！例如：
Do you have any idea how much work explaining code line by line is?
Every single line needs a paragraph of explanation! For example:
int next = r.Next();
创建一个名为next的新变量，它可以包含一个整数值。从先前声明的Random实例r，调用Next方法获取一个新的随机数，并将其分配给next变量。
可以你想象我们需要多长时间才能解释一个像你的例子一样的非常短的代码片段，一行一行？
不会发生这种情况。如果您有特定问题，请询问有关它的问题。但首先考虑一下 - 你想坐下45分钟并且没有充分的理由输入逐行描述吗？
此外，这是你的家庭作业，不是我们的：我们不做你的作业：这是有原因的。它就是为了让你思考你被告知的事情，并试着理解它。它也在那里，以便您的导师可以识别您身体虚弱的区域，并将更多的注意力集中在补救措施上。
亲自尝试，你可能会发现它不是和你想的一样困难！
如果遇到具体问题，请询问相关问题，我们会尽力提供帮助。但是我们不打算为你做这一切！
Create a new variable called "next" which can hold a integer value. From the previously declared Random instance "r", call the "Next" method to get a new random number, and assign it to the "next" variable.
Can you imagine how long it would take us to explain even a very short code fragment like your example, line by line?
No. It is not going to happen. If you have a specific problem, then ask a question about it. But think first - would you want to sit down for 45 minutes and type up a line-by-line description for no good reason?
And besides, this is your homework, not ours: We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.
Try it yourself, you may find it is not as difficult as you think!
If you meet a specific problem, then please ask about that and we will do our best to help. But we aren't going to do it all for you!
什么是以下代码的输出
有一种简单的方法可以得到答案：运行代码！
There is an easy way to get the answer: Run the code !
解释以下代码的输出
了解代码执行的最佳方法是在执行时观察它，这是究竟是什么调试器。
你的代码没有你想象的那样，或者你不明白为什么！
有一个几乎通用的解决方案：一步一步地在调试器上运行你的代码，检查变量。
调试器在这里向你展示你的代码在做什么，你的任务是与它应该做的比较。
调试器中没有魔法，它不知道你应该做什么，它没有找到错误，它只是通过向你展示帮助你什么是g在上面。当代码没有达到预期的效果时，你就接近了一个错误。
要查看你的代码在做什么：只需设置断点并查看代码是否正常运行，调试器允许你执行第1行第1行，并在执行时检查变量。
调试器 - 维基百科，免费的百科全书 [ ^ ]
http://docs.oracle.com/javase/7/docs/technotes/tools/windows /jdb.html [ ^ ]
https： //www.jetbrains.com/idea/help/debugging-your-first-java-application.html [ ^ ]
调试器仅显示您的代码正在执行的操作，您的任务是与什么进行比较应该这样做。
The best way to understand what the code is doing is to watch it as it execute, this is exactly what does the debugger.
Your code do not behave the way you expect, or you don't understand why !
There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.
Debugger - Wikipedia, the free encyclopedia[^]
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/jdb.html[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]
The debugger is here to only show you what your code is doing and your task is to compare with what it should do.
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