Java | Data Types: Java data types are strings, numbers and boolean values. One by One: Strings: The strings are nothing but collection of characters and also text is in between double quotes. Numbers: The numbers are sub divided into int, float, double and long. Ex: 10 is int, 3.14F is float, it takes up to 7 decimal positions, 2.414343 is double, it takes up to 15 decimal positions and 1234565432112345L is long Boolean: There are two boolean values, those are true and false. Here is the Code: import java.io.*; class Main { public static void main (String[] args) { // String System.out.println("cool"); // Integer System.out.println(1); // float takes up to 7 decimal positions System.out.println(3.1421242323243554545F); // double takes up to 15 decimal positions System.out.println(2.4143245423242342321); // long System.out.println(12345432123454321L); // boolean System.ou