Collections Java Tutorial

You can now use it to iterate over an array or a collection without the index.
Use this syntax to iterate over an array:

for (componentType variable: arrayName)
Where arrayName is the reference to the array,
componentType is the component type of the array, and
variable is a variable that references each component of the array.

import java.util.Arrays;
public class MainClass {
  public static void main(String[] arg) {
    double[] data = new double[50]; // An array of 50 values of type double
    Arrays.fill(data, 1.0);                     // Fill all elements of data with 1.0
    
    for (double d: data) { 
      System.out.println(d);
    }
    
  }
}
1.0
1.0