有没有一种方法可以将三个一维数组转换为多维数组。例如，我有三个数组（文本、转发、地理）如何合并它们，使其显示为：-
我想要合并的数组是一些类似于text='hello'，'hello'的行。retweets='2,5'和geo='19912299293'。
并且应该导致：-
combined =
[hello, 2, 19912
hello, 5, 929293]
因此。。。所有阵列的大小都相同。我知道我应该以某种方式循环通过for循环，但不太确定如何实现它
感谢您的回复。
int count = ...;
String [] text = new String [count];
int [] retweets = new int [count];
int [] geo = new int [count];
// Fill arrays with data here
Object [] combined = new Object [count * 3];
for (int i = 0, j = 0; i < count; i++)
{
combined [j++] = text [i];
combined [j++] = retweets [i];
combined [j++] = geo [i];
}
public static void main(String[] args) {
String[] array1 = { "hello1", "A2", "X19912" };
String[] array2 = { "hello2", "B2", "Y19912" };
String[] array3 = { "hello3", "C2", "Z19912" };
String[] copyArrays = new String[array1.length + array2.length
+ array3.length];
System.arraycopy(array1, 0, copyArrays, 0, array1.length);
System.arraycopy(array2, 0, copyArrays, array1.length, array2.length);
System.arraycopy(array3, 0, copyArrays, array1.length + array2.length,
array3.length);
String[][] array = new String[3][3];
int index = 0;
for (int i = 0; i < array.length; i++)
for (int j = 0; j < array[i].length; j++) {
array[i][j] = copyArrays[index++];
}
for (int i = 0; i < array.length; i++) {
for (int j = 0; j < array[i].length; j++) {
System.out.print(array[i][j] + " ");
}
System.out.println();
}
}
输出：
hello1 A2 X19912
hello2 B2 Y19912
hello3 C2 Z19912
此代码将首先将给定的数组复制到一个新数组中。然后，它将使用for循环将copyArrays的所有元素插入到一个2d数组中。
String[] text =...;
int[] retweets =...;
int[] geo =...;
int len = text.length;
List<List<Object>> items = new ArrayList<>();
for (int i = 0; i < len; i++) {
List<Object> item = new ArrayList<>();
item.add(text[i]);
item.add(retweets[i]);
item.add(geo[i]);
items.add(item);
}
"toTableFormTheArrays"的一个聪明方法是：
public static String[][] to2DArray(String[]... yourArrays){
return yourArrays;
}
then the code is:
String[] text = {"hello", "hello"};
String[] retweets = {2, 5};
String[] geo = {19912, 929293};
String[][] yourTableForm2DArray = to2DArray(text, retweets, geo);
注意：可以更改类型，可能会为其他D多次调用2个Darray。
String[] text = {"hello", "hello"};
int[] retweets = {2, 5};
int[] geo = {19912, 929293};
//create table of strings for each array
Object[][] combined = new Object[text.length][3];
//load information into table, converting all information into Strings
for(int row = 0; row<text.length; row++){
combined[row][0] = text[row];
combined[row][1] = retweets[row];
combined[row][2] = geo[row];
}
这将创建一个看起来像这样的多维数组：
[[hello, 2, 19912], [hello, 5, 929293 ]]