用Java中的现有数组创建二维数组 [英] Creating two Dimensional array with existing arrays in java
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问题描述
我有四个字符串数组,我想创建一个由3列和动态行组成的二维数组。
I have four arrays of strings and I would like to create a two dimensional array of 3 columns and dynamic rows.
这些数组就像:
String[] first_name;
String[] last_name;
String[] unit;
String[] phone_number;
Object[][] obj = new Object[first_name.length()][3]
我的问题是如何实现以下目标:
My problem is how do I achieve something like this:
obj = {first_name[index] + " " + last_name[index], unit[index], phone_number[index]}
请帮忙!!!
推荐答案
我假设通过动态行来表示它取决于关于 first_name
数组中元素的数量。
I am assuming that by dynamic rows you mean that it depends on the number of elements in the first_name
array.
所以您可以简单地迭代:
So you could simply iterate:
String[][]obj = new String[first_name.length][3];
for (int i = 0; i < first_name.length; i++)
{
obj[i][0] = first_name[i] + " " + last_name[i];
obj[i][1] = unit[i];
obj[i][2] = phone_number[i];
}
但是,这种方法不是很好。您应该考虑创建一个名为 Employee
的对象,该对象作为3个字段,然后只有一个 Employee
However, this approach is not very good. You should consider creating an object for example named Employee
which as the 3 fields, and then you just have an array of Employee
例如:
public class Employee
{
String name;
String unit;
String phoneNumber;
public Employee(String name, String unit, String phoneNumber)
{
//... rest of constructor to copy the fields
}
//... setters and getters
}
然后有:
Employee[] employees = new Employee[first_name.length];
for (int i = 0; i < first_name.length; i++)
{
employees[i] = new Employee(first_name[i] + " " + last_name[i], unit[i], phone_number[i]);
}
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