在Java中数组的长度是不可变的。因此，您需要将所需的部分复制到一个新数组中。 使用java.util.Arrays类中的copyOfRange方法:

int[] newArray = Arrays.copyOfRange(oldArray, startIndex, endIndex);

startIndex是要复制的范围的初始索引，包括。 endIndex是要复制的范围的最终索引，独占。(这个索引可以在数组之外)

例如:

   //index   0   1   2   3   4
int[] arr = {10, 20, 30, 40, 50};
Arrays.copyOfRange(arr, 0, 2);          // returns {10, 20}
Arrays.copyOfRange(arr, 1, 4);          // returns {20, 30, 40}
Arrays.copyOfRange(arr, 2, arr.length); // returns {30, 40, 50} (length = 5)

在Java中数组的长度是不可变的。因此，您需要将所需的部分复制到一个新数组中。 使用java.util.Arrays类中的copyOfRange方法:

int[] newArray = Arrays.copyOfRange(oldArray, startIndex, endIndex);

startIndex是要复制的范围的初始索引，包括。 endIndex是要复制的范围的最终索引，独占。(这个索引可以在数组之外)

例如:

   //index   0   1   2   3   4
int[] arr = {10, 20, 30, 40, 50};
Arrays.copyOfRange(arr, 0, 2);          // returns {10, 20}
Arrays.copyOfRange(arr, 1, 4);          // returns {20, 30, 40}
Arrays.copyOfRange(arr, 2, arr.length); // returns {30, 40, 50} (length = 5)

你可以试试:

System.arraycopy(sourceArray, 0, targetArray, 0, targetArray.length);// copies whole array

// copies elements 1 and 2 from sourceArray to targetArray
System.arraycopy(sourceArray, 1, targetArray, 0, 2); 

系统请参见javadoc。

您可以将数组包装为列表，并请求它的子列表。

MyClass[] array = ...;
List<MyClass> subArray = Arrays.asList(array).subList(index, array.length);

如果您使用的是Java 1.6或更高版本，则可以使用数组。copyOfRange复制数组的一部分。来自javadoc:

Copies the specified range of the specified array into a new array. The initial index of the range (from) must lie between zero and original.length, inclusive. The value at original[from] is placed into the initial element of the copy (unless from == original.length or from == to). Values from subsequent elements in the original array are placed into subsequent elements in the copy. The final index of the range (to), which must be greater than or equal to from, may be greater than original.length, in which case false is placed in all elements of the copy whose index is greater than or equal to original.length - from. The length of the returned array will be to - from.

这里有一个简单的例子:

/**
 * @Program that Copies the specified range of the specified array into a new 
 * array.
 * CopyofRange8Array.java 
 * Author:-RoseIndia Team
 * Date:-15-May-2008
 */
import java.util.*;
public class CopyofRange8Array {
    public static void main(String[] args) {
       //creating a short array
       Object T[]={"Rose","India","Net","Limited","Rohini"};
        // //Copies the specified  short array upto specified range,
        Object T1[] = Arrays.copyOfRange(T, 1,5);
        for (int i = 0; i < T1.length; i++) 
            //Displaying the Copied short array upto specified range
            System.out.println(T1[i]);
    }

}

是的，你可以使用Arrays.copyOfRange

它做的是同样的事情(注意有一个副本:你不改变初始数组)。