Convert the switch statement in the second question to an if statement with multiple alternatives. Solution Switch sometimes has clear performance advantages over an if-statement. Consider this example. The values 0 through 4 are tested many times. Usually no cases in the switch or the if -statement are matched. So the switch statement is executed faster. Switch can slow down a method. If one case is most common, checking it first in an if -statement is worth trying. Java that times switch, if-statement public class Program { public static void main(String[] args) { long t1 = System.currentTimeMillis(); // ... Use switch int total = 0; for (int i = 0; i < 100000000; i++) { switch (i) { case 0: total--; break; case 1: total -= 2; break; case 2: case 3: case 4: total++; break; } } long t2 = System.currentTimeMillis(); // ... Use if-else int total2 = 0; for (int i = 0; i < 100000000; i+ ...
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