在Java中流式传输的数组
先决条件: Java中的流
使用 Arrays.stream() :
句法 :
public static Stream getStream(T[] arr)
{
return Arrays.stream(arr);
}
where, T represents generic type.
示例 1: Arrays.stream() 将字符串数组转换为流。
// Java code for converting string array
// to stream using Arrays.stream()
import java.util.*;
import java.util.stream.*;
class GFG {
public static void main(String[] args)
{
// Converting String array to stream
String[] arr = { "Geeks", "for", "Geeks" };
// Using Arrays.stream to convert an
// array into Stream
Stream stm = Arrays.stream(arr);
// Displaying elements in Stream
stm.forEach(str -> System.out.print(str + " "));
}
}
输出:
Geeks for Geeks
示例 2: Arrays.stream() 将 int 数组转换为流。
// Java code for converting string array
// to stream using Arrays.stream()
import java.util.*;
import java.util.stream.*;
class GFG {
public static void main(String[] args)
{
// Converting int array to stream
int arr[] = { 1, 2, 3, 4, 5 };
IntStream stm = Arrays.stream(arr);
stm.forEach(a -> System.out.print(a + " "));
}
}
输出:
1 2 3 4 5
示例 3: Arrays.stream() 将 long 和 double 数组转换为流。
// Java code for converting string array
// to stream using Arrays.stream()
import java.util.*;
import java.util.stream.*;
class GFG {
public static void main(String[] args)
{ // Converting long array to stream
long[] arrL = { 3L, 5L, 6L, 8L, 9L };
LongStream stmL = Arrays.stream(arrL);
stmL.forEach(number -> System.out.print(number + " "));
System.out.println();
// Converting double array to stream
double[] arrD = { 1, 2, 3, 4, 5 };
DoubleStream stmD = Arrays.stream(arrD);
stmD.forEach(d -> System.out.print(d + " "));
}
}
输出:
输出:
3 5 6 8 9
1.0 2.0 3.0 4.0 5.0
使用 Stream.of()、IntStream.of()、LongStream.of() 和 DoubleStream.of() :
句法 :
public static Stream getStream(T[] arr)
{
return Stream.of(arr);
}
where, T represents generic type.
Syntax of other functions is similar
注意:对于对象数组,Stream.of() 内部使用 Arrays.stream()。
示例 1: Arrays.stream() 将字符串数组转换为流。
// Java code for converting string array
// to stream using Stream.of()
import java.util.*;
import java.util.stream.*;
class GFG {
public static void main(String[] args)
{
// Converting String array to stream
String[] arr = { "Geeks", "for", "Geeks" };
// Using Arrays.stream to convert an
// array into Stream
Stream stm = Stream.of(arr);
// Displaying elements in Stream
stm.forEach(str -> System.out.print(str + " "));
}
}
输出:
Geeks for Geeks
示例 2: Arrays.stream() 将 int 数组转换为流。
// Java code for converting string array
// to stream using IntStream.of()
import java.util.*;
import java.util.stream.*;
class GFG {
public static void main(String[] args)
{
// Converting int array to stream
int arr[] = { 1, 2, 3, 4, 5 };
IntStream stm = IntStream.of(arr);
stm.forEach(a -> System.out.print(a + " "));
}
}
输出:
1 2 3 4 5
示例 3: Arrays.stream() 将 long 和 double 数组转换为流。
// Java code for converting string array
// to stream using DoubleStream.of()
import java.util.*;
import java.util.stream.*;
class GFG {
public static void main(String[] args)
{ // Converting long array to stream
long[] arrL = { 3L, 5L, 6L, 8L, 9L };
LongStream stmL = LongStream.of(arrL);
stmL.forEach(number -> System.out.print(number + " "));
System.out.println();
// Converting double array to stream
double[] arrD = { 1, 2, 3, 4, 5 };
DoubleStream stmD = DoubleStream.of(arrD);
stmD.forEach(d -> System.out.print(d + " "));
}
}
输出:
输出:
3 5 6 8 9
1.0 2.0 3.0 4.0 5.0