The basic difference is that primitive variables store the actual values, whereas reference variables store the addresses of the objects they refer to. Let’s assume that a class Person is already defined. If you …

Sep 13, 2010 · Where does the Java JVM store primitive variables, and how is the memory used by primitives freed after use? I guess it is on the stack?

The types of the Java programming language are divided into two categories: primitive types and reference types. The primitive types [...] are the boolean type and the numeric types. The numeric …

Jun 15, 2012 · When declaring any primitive type data like int or double they get initialized to 0 or 0.0. Why can we not set them to null?

Feb 12, 2015 · 3 I want know that the type of variable in my class for example: int x=1; char c=5; System.out.println(x+c);// out put is 6 but i want to know the type of x+c, whether it belongs to integer …

May 10, 2021 · I understand object variables store references (mem address) and primitive variable types store values but doesnt a primitive still need a mem addr to locate the value? Therefore does a …

Aug 22, 2016 · Does it have a value? I am trying to understand what is the state of a declared but not-initialized variable/object in Java. I cannot actually test it, because I keep getting the "Not Initialized"

Sep 11, 2012 · Is there a "typeof" like function in Java that returns the type of a Primitive Data Types (PDT) variable or an expression of operands PDTs? instanceof seems to work for class …

Apr 15, 2025 · In Java, we can directly use String to declare a string variable name and specify its value. We do not have to define the string as an array by using new keyword, even though String is non …

Oct 22, 2010 · Java is a statically typed language, so the compiler does most of this checking for you. Once you declare a variable to be a certain type, the compiler will ensure that it is only ever assigned …