put items from string into integet array java code example

Example 1: convert array string to number

// CONVERT ARRAY STRING TO ARRAY NUMBER
const arrStr = ["1", "3", "5", "9"];
const nuevo = arrStr.map((i) => Number(i));
console.log(nuevo);
// [1,3,5,9];

Example 2: how to convert array to int

int i, k = 0;
for (i = 0; i < n; i++)
    k = 10 * k + a[i];