How to convert String to Integer or int in Java?

There a two ways to convert String object to integer value.

1. Using Integer.parseInt()

This method takes a String object as parameter and returns it primitive type int value.

String s = "100";

int i = Integer.parseInt(s);

System.out.println("Integer value is " + i);

2. Using Integer.valueOf()

This method takes a String object as parameter and returns an object of Integer class.

String s = "100";

Integer i = Integer.valueOf(s);

System.out.println("Integer value is " + i);