Guava – Longs.join()方法与实例

Guava – Longs.join()方法与实例

The join() method of Guava库中的Longs类 ,用于组合或连接所有给定的长值,用一个 separator 。这些长值被作为参数传递给这个方法。这个方法也把分隔符作为参数。该方法返回一个字符串,它是对指定的长值进行连接操作的结果。

例如。 join(“-“, 1L, 2L, 3L) 返回字符串 “1-2-3″。

语法:

public static String join(String separator, long… array)

参数: 该方法接受两个强制性参数。

  • separator: 它是出现在连接的长值之间的字符。
  • array: 这是一个要连接的长值的数组。

返回值: 该方法返回一个字符串,包含所有给定的长值,用分隔符分开。

下面的程序说明了这个方法的使用。

示例1:

// Java code to show implementation of
// Guava's Longs.join() 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 = { 2, 4, 6, 8, 10 };
  
        // Using Longs.join() method to get a
        // string containing the elements of array
        // separated by a separator
        System.out.println(Longs.join("#", arr));
    }
}

输出:

2#4#6#8#10

示例2:

// Java code to show implementation of
// Guava's Longs.join() 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 = { 3, 5, 7, 9, 11 };
  
        // Using Longs.join() method to get a
        // string containing the elements of array
        // separated by a separator
        System.out.println(Longs.join("*", arr));
    }
}

输出:

3*5*7*9*11

参考:

https://google.github.io/guava/releases/21.0/api/docs/com/google/common/primitives/Longs.html#join-java.lang.String-long…-

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