Guava – Booleans.contains()方法及示例
Guava库中Booleans类的contains()方法用于检查一个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搜索的布尔数组都作为一个参数。
语法:
public static boolean contains(boolean[] array,
boolean target)
参数:该方法接受两个强制性参数。
- array:这是一个布尔值的数组,目标值将在其中被搜索。
- target:是要在数组中搜索的布尔值。
返回值: 该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,它返回True。否则,它返回false。
下面的程序说明了contains()方法的使用。
例子-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
例子 – 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
参考资料:
https://google.github.io/guava/releases/20.0/api/docs/com/google/common/primitives/Booleans.html#contains-boolean:A-boolean-