流toArray()返回包含此流元素的数组。这是终端操作,即可能会遍历流以产生结果或副作用。执行终端操作后,流管线被视为已消耗,无法再使用。
用法:
Object[] toArray()
返回值:该函数返回一个包含此流元素的数组。
示例1:
// Java code for Stream toArray()
import java.util.*;
import java.util.stream.Stream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating a Stream of Integers
Stream<Integer> stream = Stream.of(5, 6, 7, 8, 9, 10);
// Using Stream toArray()
Object[] arr = stream.toArray();
// Displaying the elements in array arr
System.out.println(Arrays.toString(arr));
}
}
输出:
[5, 6, 7, 8, 9, 10]
示例2:
// Java code for Stream toArray()
import java.util.*;
import java.util.stream.Stream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating a Stream of Strings
Stream<String> stream = Stream.of("Geeks", "for",
"Geeks", "GeeksQuiz");
// Using Stream toArray()
Object[] arr = stream.toArray();
// Displaying the elements in array arr
System.out.println(Arrays.toString(arr));
}
}
输出:
[Geeks, for, Geeks, GeeksQuiz]
示例3:
// Java code for Stream toArray()
import java.util.*;
import java.util.stream.Stream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating a Stream of Strings
Stream<String> stream = Stream.of("Geeks", "for",
"gfg", "GeeksQuiz");
// Using Stream toArray() and filtering
// the elements that starts with 'G'
Object[] arr = stream.filter(str
-> str.startsWith("G"))
.toArray();
// Displaying the elements in array arr
System.out.println(Arrays.toString(arr));
}
}
输出:
[Geeks, GeeksQuiz]
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注:本文由纯净天空筛选整理自Sahil_Bansall大神的英文原创作品 Stream toArray() in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。