Implicit Casting

Implicit casting is when Java automatically converts a smaller data type into a larger one - no manual cast needed.

Order

Safe and automatic - no data loss.

byte → short → int → long → float → double

Example

int x = 20;
double y = x; // x → double (automatically)
System.out.println(y); // 20

Notes

• Happens automatically when moving from a smaller to a larger type
• Java handles it because there’s no risk of losing data
• Also works with characters:

  char c  = 'A';
  int code = c; // 'A' → 65

Tip

If the conversion goes from smaller to larger, Java handles it for you.

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Parent: _Casting & Types