How much memory does a variable of type Integer occupy in a computer's memory?

In Java, the Integer type is a wrapper class for the primitive type int. The primitive int occupies 4 bytes (32 bits) of memory.

However, the Integer object takes up more memory, as it contains JVM object overhead (such as the object header) and a field to store the int value.

It can be roughly estimated that an Integer object occupies about 16-24 bytes depending on the JVM implementation and platform, but the exact size depends on the JVM and architecture.

When talking about the primitive int, it always occupies 4 bytes.