how to get api using string as input in java code example

Example 1: how to get input from the console in c++

int age;
cin >> age;

Example 2: adding a variable to a string without using + in javascript

let a = 5;
let b = 10;
console.log(`The sum of a and b is ${a+b} and the multiplication is ${a*b}`); 
// The sum of a and b is 15 and the multiplication is 50