Guava – Chars.concat()方法与实例

Guava Chars.concat() 方法与实例

Guava库中Chars类的concat()方法是用来将许多数组的值连接成一个单一的数组。这些要串联的char数组被指定为该方法的参数.

例如。 concat(new char[] {a, b}, new char[] {}, new char[] {c}
返回阵列{a, b, c}。

语法:

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

参数: 本方法接受 arrays 作为参数,即本方法要连接的char数组。

返回值: 该方法返回一个单一的char数组,其中包含所有指定的char数组值的原始顺序。

以下程序说明了concat()方法的使用。

示例 1:

// Java code to show implementation of
// Guava's Chars.concat() method
  
import com.google.common.primitives.Chars;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating 2 Character arrays
        char[] arr1 = { 'H', 'E', 'L', 'L', 'O' };
        char[] arr2 = { 'G', 'E', 'E', 'K', 'S' };
  
        // Using Chars.concat() method to combine
        // elements from both arrays into a single array
        char[] res = Chars.concat(arr1, arr2);
  
        // Displaying the single combined array
        System.out.println(Arrays.toString(res));
    }
}

输出:

[H, E, L, L, O, G, E, E, K, S]

示例 2:

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

输出:

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

参考文献: https://google.github.io/guava/releases/18.0/api/docs/com/google/common/primitives/Chars.html#concat(char[]…)

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