VERRRRRRY Basic Introduction to Java Programming

1. Basic Program Structure

Every Java program starts with a class, and the main method is the entry point of the program. Here's a simple example:

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello, World!");
    }

Java Control Flow: If Statements and Loops

If Statements

Basic If Statement

The simplest form of decision making:

public class BasicIf {
    public static void main(String[] args) {

Java Variables, Operators, and Types

Primitive Data Types

Java has eight primitive data types that store simple values. Here's a comprehensive overview:

public class PrimitiveTypes {
    public static void main(String[] args) {
        // Integer types
        byte smallNumber = 127;          // 8-bit, range: -128 to 127

You need to memorize each of these pandas functions.

It's suggested that you write them all donw longhand, add summary of what the function does, in your own words. Then create a 3by5 flash card for each one.

• loc()
• iloc()
• head(n)
• tail(n)
• info()

To make Zed fonts bigger or whatever,

in file ~/.config/zed/settings.json

// Zed settings
//
// For information on how to configure Zed, see the Zed

If the discussion above sounds like gobbledygook to you, consider the famous Heinlein quote:

A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.

Presumably Heinlein meant his list to be representative and fluid rather than exhaustive and static. Presumably he also meant to suggest a capacity for generalized learning of new skills, including the

12 THINGS THAT REQUIRE ZERO TALENT

• Being On Time
• Making An Effort
• Being High Energy
• Having A Positive Attitude
• Being Passionate
• Using Good Body Language
• Being Coachable
• Doing A Little Extra