Java Arrays stream(double[] a)Method

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Description

The Java Arrays stream(double[] a) method returns a sequential DoubleStream with the specified array as its source.

Declaration

Following is the declaration for java.util.Arrays.stream(double[] a) method

public static DoubleStream stream(double[] array)

Parameters

a − This is the array, assumed to be unmodified during use.

Return Value

This method returns a stream for the array elements.

Exception

NA

Java Arrays stream(double[] a, int fromIndex, int toIndex) Method

Description

The Java Arrays stream(double[] a, int fromIndex, int toIndex) method returns a sequential DoubleStream with the specified range of the specified array.

Declaration

Following is the declaration for java.util.Arrays.stream(double[] a, int fromIndex, int toIndex) method

public static DoubleStream stream(double[] array, int fromIndex, int toIndex)

Parameters

• a − This is the array, assumed to be unmodified during use.

• fromIndex − This is the index of the first element, inclusive, to be covered.

• toIndex − This is the index of the last element, exclusive, to be covered

Return Value

This method returns a stream for the array elements.

Exception

• ArrayIndexOutOfBoundsException − if fromIndex < 0 or toIndex > array.length

Getting stream of Array of doubles Example

The following example shows the usage of Java Arrays stream(double[]) method. First, we've created an array of doubles. Using stream() method, array is printed thereafter.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {
      // initialize array
      double arr[] = { 11.0, 54.0, 23.0, 32.0, 15.0, 24.0, 31.0, 12.0 };

      System.out.print("Array: [ ");

      // use the stream to print each item
      Arrays.stream(arr).forEach(i -> System.out.print(i + " "));
      
      System.out.print("]");
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Array: [ 11.0 54.0 23.0 32.0 15.0 24.0 31.0 12.0 ]

Getting stream of Array of doubles using Range Example

The following example shows the usage of Java Arrays stream(double[], int, int) method. First, we've created an array of doubles. Using stream() method, array is printed thereafter.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {
      // initialize array
      double arr[] = { 11.0, 54.0, 23.0, 32.0, 15.0, 24.0, 31.0, 12.0 };

      System.out.print("Array: [ ");

      // use the stream to print each item
      Arrays.stream(arr, 0, arr.length).forEach(i -> System.out.print(i + " "));
      
      System.out.print("]");
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Array: [ 11.0 54.0 23.0 32.0 15.0 24.0 31.0 12.0 ]

Getting stream of Sub-Array of doubles Example

The following example shows the usage of Java Arrays stream(double[], int, int) method. First, we've created an array of doubles. Using stream() method, a sub-array is printed thereafter.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {
      // initialize array
      double arr[] = { 11.0, 54.0, 23.0, 32.0, 15.0, 24.0, 31.0, 12.0 };

      System.out.print("Array: [ ");

      // use the stream to print each item
      Arrays.stream(arr, 0, 5).forEach(i -> System.out.print(i + " "));
      
      System.out.print("]");
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Array: [ 11.0 54.0 23.0 32.0 15.0 ]