how to replace first character of string in java code example

Example 1: java remove first character from string

String string = "Hello World";

//Remove first character
string.substring(1); //ello World

//Remove last character
string.substring(0, string.length()-1); //Hello Worl

//Remove first and last character
string.substring(1, string.length()-1); //ello Worl

Example 2: get first character of string java

var string = "freeCodecamp";

string.charAt(0); // Returns "f"