Java番石榴 |带有示例的 Doubles.contains() 方法

Guava 库中Doubles 类的contains()方法用于检查指定的值是否存在于指定的 double 值数组中。要搜索的双精度值和要搜索的双精度数组都作为参数。

句法：

public static boolean contains(double[] array,
                               double target)

参数：此方法接受两个强制参数：

• 数组：这是一个双精度值数组，其中要搜索的目标值。
• 目标：这是要在数组中搜索的双精度值。

返回值：此方法返回一个布尔值，说明目标双精度值是否存在于指定的双精度数组中。如果目标值存在于数组中，则返回True 。否则返回False 。

下面的程序说明了 contains() 方法的使用：

示例 1：

// Java code to show implementation of
// Guava's Doubles.contains() method
  
import com.google.common.primitives.Doubles;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating a Double array
        double[] arr = { 5.2, 4.2, 3.4, 2.3, 1.5 };
  
        double target = 3.4;
  
        // Using Doubles.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Doubles.contains(arr, target))
            System.out.println("Target is present"
                               + " in the array");
        else
            System.out.println("Target is not present"
                               + " in the array");
    }
}

输出：

Target is present in the array

示例 2：

// Java code to show implementation of
// Guava's Doubles.contains() method
  
import com.google.common.primitives.Doubles;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating a Double array
        double[] arr = { 2.3, 4.4, 6.5, 8.6, 10.7 };
  
        double target = 7.5;
  
        // Using Doubles.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Doubles.contains(arr, target))
            System.out.println("Target is present"
                               + " in the array");
        else
            System.out.println("Target is not present"
                               + " in the array");
    }
}

输出：

Target is not present in the array

参考：
https://google.github.io/guava/releases/19.0/api/docs/com/google/common/primitives/Doubles.html#contains(double[], %20double)