how to uppercase the first letter of a string in ajva code example

Example 1: init cap java

String str = "java";
str = str.substring(0, 1).toUpperCase() + str.substring(1);
// str = "Java"

Example 2: java method to capitalize first letter

String str = "java";
String cap = str.substring(0, 1).toUpperCase() + str.substring(1);
// cap = "Java"