爪哇番石榴| Longs.concat()方法，带示例
原文:https://www . geesforgeks . org/Java-guava-longs-concat-method-with-examples/
番石榴库中 Longs 类的 concat() 方法用于将多个数组的值连接成一个数组。这些要连接的长数组被指定为此方法的参数。
例如: concat(new long[] {1，2}、new long[] {3，4，5}、new long[] {6，7} 返回数组{1，2，3，4，5，6，7}。
语法:
public static long[] concat(long[]... arrays)
参数:该方法接受数组作为参数，这是该方法要连接的长数组。
返回值:这个方法返回一个长数组，这个长数组包含所有指定的长数组值的原始顺序。
下面的程序说明了 concat()方法的使用:
例 1:
// Java code to show implementation of
// Guava's Longs.concat() method
import com.google.common.primitives.Longs;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating 2 Long arrays
long[] arr1 = { 1, 2, 3, 4, 5 };
long[] arr2 = { 6, 2, 7, 0, 8 };
System.out.println("Long Array 1: "
+ Arrays.toString(arr1));
System.out.println("Long Array 2: "
+ Arrays.toString(arr2));
// Using Longs.concat() method to combine
// elements from both arrays
// into a single array
long[] res = Longs.concat(arr1, arr2);
// Displaying the single combined array
System.out.println("Combined Array: "
+ Arrays.toString(res));
}
}
Output:
Long Array 1: [1, 2, 3, 4, 5]
Long Array 2: [6, 2, 7, 0, 8]
Combined Array: [1, 2, 3, 4, 5, 6, 2, 7, 0, 8]
例 2:
// Java code to show implementation of
// Guava's Longs.concat() method
import com.google.common.primitives.Longs;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating 4 long arrays
long[] arr1 = { 1, 2, 3 };
long[] arr2 = { 4, 5 };
long[] arr3 = { 6, 7, 8 };
long[] arr4 = { 9, 0 };
System.out.println("Long Array 1: "
+ Arrays.toString(arr1));
System.out.println("Long Array 2: "
+ Arrays.toString(arr2));
System.out.println("Long Array 3: "
+ Arrays.toString(arr3));
System.out.println("Long Array 4: "
+ Arrays.toString(arr4));
// Using Longs.concat() method to combine
// elements from both arrays
// into a single array
long[] res
= Longs
.concat(arr1, arr2, arr3, arr4);
// Displaying the single combined array
System.out.println("Combined Array: "
+ Arrays.toString(res));
}
}
Output:
Long Array 1: [1, 2, 3]
Long Array 2: [4, 5]
Long Array 3: [6, 7, 8]
Long Array 4: [9, 0]
Combined Array: [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
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