Java番石榴 |带有示例的 Booleans.countTrue() 方法
Guava 库中Booleans 类的countTrue()方法用于统计作为参数传递的指定布尔值中为真值的个数。
句法:
public static int countTrue(boolean... values)
参数:此方法接受布尔值,其中要计算真实值。
返回值:此方法返回一个整数值,它是真值的计数。
示例 1:
// Java code to show implementation of
// Guava's Booleans.countTrue() 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 };
// Using Booleans.countTrue() method to
// get the number of values that are true
System.out.println(Booleans.countTrue(arr));
}
}
输出:
3
示例 2:
// Java code to show implementation of
// Guava's Booleans.countTrue() 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, false,
false, false };
// Using Booleans.countTrue() method to
// get the number of values that are true
System.out.println(Booleans.countTrue(arr));
}
}
输出:
0
参考: https://google.github.io/guava/releases/20.0/api/docs/com/google/common/primitives/Booleans.html#countTrue-boolean…-