Guava Ints concat() 函数

Guava’s Ints .concat() 方法用于将作为参数传递的数组合并成一个数组。该方法返回每个提供的数组的值，并将其合并为一个数组。例如，concat(new int[] {a, b}, new int[] {}, new int[] {c})返回数组{a, b, c}。

语法:

public static int[] concat(int[]... arrays)

参数：该方法接受 arrays 作为参数，代表零个或多个int数组。

返回值： 该方法返回一个单一的数组，包含源数组的所有值，按顺序排列。

示例1:

// Java code to show implementation of
// Guava's Ints.concat() method
  
import com.google.common.primitives.Ints;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating 2 Integer arrays
        int[] arr1 = { 1, 2, 3, 4, 5 };
        int[] arr2 = { 6, 2, 7, 0, 8 };
  
        // Using Ints.concat() method to combine
        // elements from both arrays into a single array
        int[] res = Ints.concat(arr1, arr2);
  
        // Displaying the single combined array
        System.out.println("Combined Array: "
                           + Arrays.toString(res));
    }
}

输出:

Combined Array: [1, 2, 3, 4, 5, 6, 2, 7, 0, 8]

示例2:

// Java code to show implementation of
// Guava's Ints.concat() method
  
import com.google.common.primitives.Ints;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating 4 Integer arrays
        int[] arr1 = { 1, 2, 3 };
        int[] arr2 = { 4, 5 };
        int[] arr3 = { 6, 7, 8 };
        int[] arr4 = { 9, 0 };
  
        // Using Ints.concat() method to combine
        // elements from both arrays into a single array
        int[] res = Ints.concat(arr1, arr2, arr3, arr4);
  
        // Displaying the single combined array
        System.out.println("Combined Array: "
                           + Arrays.toString(res));
    }
}

输出:

Combined Array: [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]

参考: https://google.github.io/guava/releases/22.0/api/docs/com/google/common/primitives/Ints.html#concat-int:A…-