Switch Case Java String

When java reaches a break keyword it breaks out of the switch block.

Switch case java string. When a match is found and the job is done it s time for a break. In order for the stringswitchdemo example to accept any month regardless of case month is converted to lowercase with the tolowercase method and all the strings associated with the case labels. Java program to use string class in switch case statements. Beginning with jdk 7 we can use a string literal constant to control a switch statement which is not possible in c c.

Each case is followed by the value to be compared to and a colon. The following rules apply to a switch statement the variable used in a switch statement can only be integers convertable integers byte short char strings and enums. Switch case statement is used when we have number of options or choices and we may need to perform a different task for each choice. Using a string based switch is an improvement over using the equivalent sequence of if else statements.

Switch statement existed before java 7 as well but it supported only int and enum types. After java 7 release switch statement support string class also. Java switch case with string. 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.

Java switch case uses string equals method to compare the passed value with case values so make sure to add a null check to avoid nullpointerexception. There is no need for more testing. Java switch with string with examples and topics on functional interface anonymous class lambda for list lambda for comparable default methods method reference java date and time java nashorn java optional stream filter etc. The java compiler generates generally more efficient bytecode from switch statements that use.

According to java 7 documentation for strings in switch java compiler generates more efficient byte code for string in switch statement than chained if else if statements. You can have any number of case statements within a switch. Consequently the comparison of string objects in switch statements is case sensitive. The syntax of switch case statement looks like this switch variable or an integer expression case constant.

String in switch case in java last updated.