拆分一个向量并填充其他元素，以便具有特定的长度

def split_and_pad_vector(vector, target_length, padding_value):
    if len(vector) < target_length:
        vector.extend([padding_value] * (target_length - len(vector)))
    elif len(vector) > target_length:
        vector = vector[:target_length]
    return vector

# 示例用法
original_vector = [1, 2, 3]
target_length = 5
padding_value = 0
result = split_and_pad_vector(original_vector, target_length, padding_value)
print(result)

import java.util.Arrays;

public class VectorUtils {
    public static int[] splitAndPadVector(int[] vector, int targetLength, int paddingValue) {
        if (vector.length < targetLength) {
            int[] paddedVector = Arrays.copyOf(vector, targetLength);
            Arrays.fill(paddedVector, vector.length, targetLength, paddingValue);
            return paddedVector;
        } else if (vector.length > targetLength) {
            return Arrays.copyOf(vector, targetLength);
        } else {
            return vector;
        }
    }

    // 示例用法
    public static void main(String[] args) {
        int[] originalVector = {1, 2, 3};
        int targetLength = 5;
        int paddingValue = 0;
        int[] result = splitAndPadVector(originalVector, targetLength, paddingValue);
        System.out.println(Arrays.toString(result));
    }
}