Integer[] to int[] java code example

Example 1: list to int array in java 8

int[] array = list.stream().mapToInt(i->i).toArray();

Example 2: java int to int array

int number = 110101; 
String temp = Integer.toString(number);
int[] numbers = new int[temp.length()];
for (int i = 0; i < temp.length(); i++) {
    numbers[i] = temp.charAt(i) - '0';
}

Example 3: how to convert primitive int to Integer in java

public class IntToIntegerExample {
  	public static void main(String[] args) {
    int i = 10;    
    Integer intObj = new Integer(i);
    System.out.println(intObj);
  }
}

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