Guava – Longs.contains()方法与实例

Guava的Longs类的Longs.contains()方法是用来检查一个值，即目标值是否存在于数组中。这个目标值和数组被作为该方法的参数。这个方法返回一个布尔值，说明目标值是否是

语法:

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

参数: 这个方法接受两个参数。

返回值： 如果对于i的某个值，存在于i True 索引的值等于目标值，则该方法返回 th 异常情况。 False .

该方法不抛出任何异常。

示例1:

// Java code to show implementation of// Guava's Longs.contains() method  import com.google.common.primitives.Longs;import java.util.Arrays;  class GFG {      // Driver's code    public static void main(String[] args)    {        // Creating a long array        long[] arr = { 5L, 4L, 3L, 2L, 1L };          long target = 3L;          // Using Longs.contains() method to search        // for an element in the array. The method        // returns true if element is found, else        // returns false        if (Longs.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 Longs.contains() method  import com.google.common.primitives.Longs;import java.util.Arrays;  class GFG {    // Driver's code    public static void main(String[] args)    {        // Creating a long array        long[] arr = { 2L, 4L, 6L, 8L, 10L };          long target = 7L;          // Using Longs.contains() method to search        // for an element in the array. The method        // returns true if element is found, else        // returns false        if (Longs.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/21.0/api/docs/com/google/common/primitives/Longs.html#contains-long:A-long-