Java vs C# Collections, Casting, and Loops Explained

“Type safety is power.” 💪🧠

In this article, we compare how Java ☕ and C# 🔷 handle collections, type casting, and control flow. Understanding these concepts helps you write safe and clean code.

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📂 Arrays vs List

Java ☕

• Arrays: fixed size, can store primitives and objects
• ArrayList: dynamic size, stores objects
• Generic collections use <Type> for type safety

C# 🔷

• Arrays: fixed size, stores value or reference types
• List<T>: dynamic, strongly typed generic collection
• Generic collections enforce compile-time type safety
  
  array: int[] numbers = new int[3]; 
  array list: List<int> numbers = new List<int>();

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🔁 Casting (Type Conversion)

Casting means convert one data type to another data type.

Java ☕

• Implicit casting: automatic, smaller → larger type
• Explicit casting: manual, larger → smaller type

C# 🔷

• Implicit casting: automatic, e.g., int → double
• Explicit casting: manual, e.g., double → int
• C# supports as and is keywords for safe reference casting

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📦 Boxing & Unboxing

Java ☕

• Autoboxing: converts primitive → wrapper class automatically
• Unboxing: wrapper class → primitive

C# 🔷

• Boxing: converts value type → object type
• Unboxing: object type → value type
• Useful when storing value types in generic collections or object references

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⚡ Control Flow: foreach, break, continue

Java ☕

• for, while, do-while loops
• foreach loop iterates arrays/collections
• break: exits loop, continue: skips current iteration

C# 🔷

• for, while, do-while loops
• foreach loop iterates arrays or generic collections
• break exits the loop, continue skips current iteration

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🎯 Key Takeaway

• Java arrays are fixed, C# has arrays + List<T>
• Both languages support implicit and explicit casting
• C# boxing/unboxing is similar to Java autoboxing/unboxing
• Control flow statements work similarly in both languages
• Type safety is crucial for fewer runtime errors 💪
  
  
  

  

  Compare Java and C# collections, type casting, boxing/unboxing, and control flow loops in a simple developer-friendly guide.