← All Courses/ICSE 2026JAVALesson 1 of 3

Java for ICSE Class 10 (Board Mastery)

Module 1: Strings in Java & Memory Management · Complete chapter-wise video lectures, whiteboard breakdowns, and ICSE Section B practice problems.

Module Progress: 33% Completed1 / 3 Lectures Done

BLOCK #1

1. String Memory & Immutability (SCP vs Heap)

Duration: 18:42 · Format: SCREEN · Exclusive Video

● LIVE STREAM READY🔒 APP EXCLUSIVE (UNLISTED)

ID: 0r1Srnkg_40

💻 Interactive Code Sandbox (JAVA)

public class StringMemory {
    public static void main(String[] args) {
        String s1 = "Vastavik";
        String s2 = "Vastavik";
        String s3 = new String("Vastavik");
        
        System.out.println("s1 == s2 : " + (s1 == s2));       // true (same SCP reference)
        System.out.println("s1 == s3 : " + (s1 == s3));       // false (distinct Heap object)
        System.out.println("s1.equals(s3) : " + s1.equals(s3)); // true (value equality)
    }
}

Exec Time: 0.0msMemory: 0MB

TERMINAL OUTPUT (STDOUT):
// Click 'Run Code' to execute and see output...

🎨 CONCEPT WHITEBOARD

Visual Diagram & Architecture Notes

📥 Download

Whiteboard Breakdown: String Constant Pool is located inside Heap space. String literals point to SCP; new String() allocates in general Heap.

Click to Zoom & Annotate

⚡ 60s REEL RECAP

Speed Recap & Key Takeaways

Quick Exam Points

3 Key Points To Memorize:

Strings are IMMUTABLE in Java — modifying a string creates a new instance.
String literals are stored in the String Constant Pool (SCP).
== compares object references, .equals() compares value content.

Play 60s Vertical ReelInstant Concept Summary

📝 PRACTICE SIR

Interactive Lesson Assessment

What will be printed by: String a = "Hello"; String b = new String("Hello"); System.out.println(a == b);

🤖 VASTAVIK AI TUTOR

Instant Doubt Clarification

Have a doubt regarding this video lecture or code? Ask below and receive instant step-by-step guidance.

Q: Why does s1 == s3 evaluate to false when both have 'Vastavik'?AI Resolved

Because `s1` refers to a pooled String literal in the String Constant Pool (SCP), while `new String("Vastavik")` explicitly creates a brand-new object in Heap memory outside SCP. The `==` operator strictly compares reference memory addresses, not the characters. To compare characters, always use `.equals()`.

10 mins ago

💬 DISCUSSION

Student & Tutor Comments (2)

Rohan Verma2 hours ago

The explanation of String Constant Pool vs Heap made it crystal clear for my board exam revision!

Prof. Anjali RoyTutor1 hour ago

Glad to hear that Rohan! Remember to write both the definition and a 2-line example when this question appears in Section A.

Sneha Patel5 hours ago

Is new String() ever recommended if SCP saves memory?

Prof. Anjali RoyTutor4 hours ago

Generally no; string literals are preferred for performance and memory. new String() is rarely needed unless explicitly forcing a separate object.