Javamedium

Static nested class vs inner class: what’s the difference?

Answer

A static nested class does not hold an implicit reference to the outer instance; it can be created without an outer object. An inner class holds a reference to the outer instance, which can increase memory usage and lead to leaks if misused.

Related questions

Java

JIT compilation: what is it and why do Java apps “warm up”?

#java#jit#performance

Java

Generational garbage collection: why does the JVM split memory into young/old?

#java#gc#jvm

Java

HashMap vs ConcurrentHashMap: when should you use each?

#java#collections#concurrency

Java

StringBuilder vs StringBuffer: what’s the difference?

#java#string#performance

Java

Try-with-resources: what does it require and why is it useful?

#java#exceptions#resources

Java

`synchronized` vs `ReentrantLock`: what are the differences?

#java#concurrency#locks