How it works: State Management: activeViz keeps track of which concept (Definition, Concatenation, Immutability, Usage) the user wants to see. immutableStep controls the stages of the Immutability demo (initial state vs. after "modification"). Navigation (viz-nav): Simple buttons update the activeViz state when clicked. The active class highlights the current selection. Conditional Rendering (renderVisualization): A switch statement checks the activeViz state and returns the appropriate JSX for that visualization. Visualizations: Definition: Uses side-by-side boxes to contrast numbers and strings, highlighting the double quotes. Shows characters combining into a quoted string. Concatenation: Shows two string variables, then visually combines their literal values using the + symbol, resulting in the new string. Immutability: This is the most interactive. It uses divs styled as "memory boxes" with simulated IDs. Clicking the "Simulate Modification" button updates the immutableStep state. This triggers conditional rendering: the original box fades, a new box appears, and the arrow (simulated by points-to span) changes target, visually demonstrating that a new object is created. Usage: Uses a grid layout with icons and example code snippets to quickly show common real-world applications. CSS: Provides the styling to make the elements look like diagrams, boxes, arrows, highlights, etc. It uses Flexbox and Grid for layout. This component provides a focused, interactive way to grasp the fundamental concepts of Java Strings visually, directly addressing the request for visualization and interaction within a single component.

with the constraint of height 600px and width 580px fixed.