Java language

Java language

1. Operators

   • Assignment Operators
   • Compound Assignment Operators
   • Relational Operators
   • "Equality" Operators
   • Arithmetic Operators
   • String Concatenation Operator
   • Increment and Decrement Operators
   • Ternary (Conditional Operator)
   • Logical Operators
     • Bitwise Operators: & 11, | (10,01,11), ^ (10,01)
     • Short-Circuit Operators: &&, ||
     • non-short-circuit Operators: &, | same as &&, || but evaluates both sides of the expression, always!
     • Logical Operators ^ exclusive-OR, ! boolean invert

2. switch statements rules

   • can evaluate only to enums or the byte, short, int, and char data types
   • The case constant must be a literal or final variable, or a constant expression, including an enum
   • If the condition in a switch statement matches a case constant, execution will run through all code in the switch following the matching case statement until a break statement or the end of the switch statement is encountered.
   • The default keyword should be used in a switch statement if you want to run some code when none of the case values match the conditional value.
   • The default block can be located anywhere in the switch block, so if no case matches, the default block will be entered, and if the default does not contain a break, then code will continue to execute (fall-through) to the end of the switch or until the break statement is encountered.