You might know that Java passes by value, but it helps to understand why. Here's what happens when you pass mutable and immutable object references in Java.

For a variable of reference type, a reference is stored in the variable and the object referred to by the reference is stored elsewhere. Variables that store references are often called reference ...

String s1 = new String("Hello world!"); That code will create an s1 string object and a reference variable. As noted, Java strings are immutable. Once created, a string using string class cannot be ...