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Java Guava Doubles.concat()用法及代码示例


Guava库中Doubles类的concat()方法用于将许多数组的值连接到一个数组中。这些要串联的双精度数组被指定为此方法的参数。

For example: concat(new double[] {a, b}, new double[] {}, new double[] {c}
returns the array {a, b, c}.

用法:


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

参数:此方法接受数组作为参数,该数组是此方法要连接的双精度数组。

返回值:此方法返回单个double数组,该数组按其原始顺序包含所有指定的double数组值。

以下示例程序旨在说明concat()方法的使用:

范例1:

// Java code to show implementation of 
// Guava's Doubles.concat() method 
  
import com.google.common.primitives.Doubles; 
import java.util.Arrays; 
  
class GFG { 
  
    // Driver's code 
    public static void main(String[] args) 
    { 
        // Creating 2 Double arrays 
        double[] arr1 = { 1.2, 2.3, 3.5, 4.4, 5.1 }; 
        double[] arr2 = { 6.2, 2.1, 7.2, 0.4, 8.7 }; 
  
        // Using Doubles.concat() method to combine 
        // elements from both arrays into a single array 
        double[] res = Doubles.concat(arr1, arr2); 
  
        // Displaying the single combined array 
        System.out.println(Arrays.toString(res)); 
    } 
}
输出:
[1.2, 2.3, 3.5, 4.4, 5.1, 6.2, 2.1, 7.2, 0.4, 8.7]

范例2:

// Java code to show implementation of 
// Guava's Doubles.concat() method 
  
import com.google.common.primitives.Doubles; 
import java.util.Arrays; 
  
class GFG { 
  
    // Driver's code 
    public static void main(String[] args) 
    { 
        // Creating 4 Double arrays 
        double[] arr1 = { 1.2, 2.3, 3.4 }; 
        double[] arr2 = { 4.5, 5.6 }; 
        double[] arr3 = { 6.4, 7.6, 8.7 }; 
        double[] arr4 = { 9.7, 0.8 }; 
  
        // Using Doubles.concat() method to combine 
        // elements from both arrays into a single array 
        double[] res 
            = Doubles.concat(arr1, arr2, arr3, arr4); 
  
        // Displaying the single combined array 
        System.out.println(Arrays.toString(res)); 
    } 
}
输出:
[1.2, 2.3, 3.4, 4.5, 5.6, 6.4, 7.6, 8.7, 9.7, 0.8]

参考: https://google.github.io/guava/releases/19.0/api/docs/com/google/common/primitives/Doubles.html#concat(double[]…)



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注:本文由纯净天空筛选整理自Sahil_Bansall大神的英文原创作品 Java Guava | Doubles.concat() method with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。