Java 11 and 12 – New Features

Another syntax for switch expressions

Apart from using -> to specify the return value, a switch expression can also use a colon (:) to mark the beginning of the code to execute and a break statement to return a value. Here's an example:

class Planet { 
    private static long damage; 
    public void use(SingleUsePlastic plastic) { 
        damage += switch(plastic) { 
            case STRAW : break 10;      // Use colon (:) to start code,                                          // Use break to return val 
            case BAG   : break 11; 
            case SPOON, FORK, KNIFE : break 7; 
            case PLATE : int radius = 6;         // no need                                                 // of using curly brace
                         break (radius < 10 ? 15 : 20); // Using                                                        // break to  
                                                      // return a value 
            case BOTTLE : break 20; 
        }; 
    } 
}