Passing by reference means we pass the real reference to the variable in memory. Java object references are passed by value. All object references in Java are passed by value.

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want.

Java naming conventions for variables, methods and reference types are where things get a little more complicated. For example, you can start a Java variable with a dollar sign or an underscore -- but ...

Java stores object values in heap memory; references to the value are stored in the stack. Another way to create strings is to use the new keyword, as in the following example. String s1 = new String( ...