Which is faster switch case or if else?

As it turns out, the switch statement is faster in most cases when compared to if-else , but significantly faster only when the number of conditions is large. The primary difference in performance between the two is that the incremental cost of an additional condition is larger for if-else than it is for switch .

No you can’t . The case labels of a switch need to be compile time evaluable constant expressions with an integral type.

The switch statement compares the String object in its expression with the expressions associated with each case label as if it were using the String. equals method; consequently, the comparison of String objects in switch statements is case sensitive .

You can use char ‘s for the switch expression and cases as well .

JavaScript has both. In a switch statement, the comparison with the cases is via === , and a string instance is not === to a string primitive . …that will turn it back into a primitive, whereupon your switch works.

You can’t switch on conditions like x. contains() . Java 7 supports switch on Strings but not like you want it. Use if etc.19 Tem 2012

Nope, switch statement requires compile time constants . The statement message. Contains(“test”) can evaluate true or false depending on the message so it is not a constant thus cannot be used as a ‘case’ for switch statement.