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Java SE (Standard Edition)

☕ Java SE (Standard Edition)

? Quick Overview

Java SE (Standard Edition) is the core and foundation of the Java platform. It provides the basic libraries, tools, and APIs required to build desktop applications, console programs, and core Java-based systems.

? Key Concepts

  • Core Java language fundamentals
  • Object-Oriented Programming (OOP)
  • JVM, JRE, and JDK architecture
  • Standard libraries (java.lang, java.util, java.io, etc.)
  • Platform-independent execution

? Syntax / Theory

Java SE includes everything needed to write, compile, and run basic Java programs. Programs are compiled into bytecode using the Java compiler (javac) and executed by the Java Virtual Machine (JVM).

? Code Example

? View Code Example 
// Basic Java SE program structure
public class Main {
public static void main(String[] args) {
System.out.println("Hello from Java SE");
}
}

? Live Output / Explanation

The program starts execution from the main method. The JVM loads the class, and the System.out.println statement prints the message to the console.

? Another Example (Using Core Library)

? View Code Example 
// Using Java SE standard library (java.util)
import java.util.Date;

public class Demo {
public static void main(String[] args) {
Date today = new Date();
System.out.println(today);
}
}

? Explanation

This example demonstrates the use of a built-in Java SE class. The Date class is part of the standard Java library and provides date and time functionality.

✅ Tips & Best Practices

  • Always start learning Java with Java SE
  • Understand JVM, JRE, and JDK clearly
  • Practice core libraries before moving to frameworks
  • Write clean and readable code

? Try It Yourself

  • Write a program to display your name and age
  • Use Scanner class to take user input
  • Create a simple calculator using Java SE