Java番石榴 |带有示例的 Booleans.contains() 方法

Guava 库中Booleans 类的contains()方法用于检查指定的值是否存在于指定的布尔值数组中。要搜索的布尔值和要在其中搜索的布尔数组都作为参数。

句法 ：

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

参数：此方法接受两个强制参数：

• array：这是一个布尔值数组，其中要搜索的目标值。
• target：这是要在数组中搜索是否存在的布尔值。

返回值：此方法返回一个布尔值，说明目标布尔值是否存在于指定的布尔数组中。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 Booleans.contains() method
  
import com.google.common.primitives.Booleans;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating a Boolean array
        boolean[] arr = { false, true, false,
                          true, true };
  
        boolean target = true;
  
        // Using Booleans.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Booleans.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 Booleans.contains() method
  
import com.google.common.primitives.Booleans;
import java.util.Arrays;
  
class GFG {
  
    // Driver's code
    public static void main(String[] args)
    {
  
        // Creating a Boolean array
        boolean[] arr = { true, true, true,
                          true, true };
  
        boolean target = false;
  
        // Using Booleans.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Booleans.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/20.0/api/docs/com/google/common/primitives/Booleans.html#contains-boolean:A-boolean-