Primitive Types in Java

From the Java cheat sheet · Variables & Data Types · verified Jul 2026

Java's eight built-in value types.

java

// Quick Reference
int i = 42;
long l = 42L;
double d = 3.14;
float f = 3.14f;
boolean b = true;
char c = 'A';

💡 int and double are the defaults; long needs L and float needs f suffixes.

⚡ char uses single quotes; double quotes always make a String, never a char.

📌 Primitives hold values directly and cannot be null (unlike wrapper objects).

🟢 Underscores in literals (1_000_000) are ignored by the compiler, purely visual.

typesprimitives

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