/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Arrays;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int[] x = {0,1,2,3};
        // int to double
        double[] doublesArray = Arrays.stream(x).asDoubleStream().toArray();
 
        //int to string
        String[] stringArray = Arrays.stream(x).mapToObj(String::valueOf).toArray(String[]::new);
 
        // string to double
        double[] doublesArrayFromString = Arrays.stream(stringArray).mapToDouble(Double::valueOf).toArray();
 
        Arrays.stream(doublesArray).forEach(System.out::println);
        Arrays.stream(stringArray).forEach(System.out::println);
        Arrays.stream(doublesArrayFromString).forEach(System.out::println);
	}
}

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