switch case algorithm java code example

Example 1: java switch

int day = 4;
switch (day) {
  case 6:
    System.out.println("Today is Saturday");
    break;
  case 7:
    System.out.println("Today is Sunday");
    break;
  default:
    System.out.println("Looking forward to the Weekend");
}
// Outputs "Looking forward to the Weekend"

Example 2: switch statement in java

// switch case in java example programs
public class SwitchStatementExample
{
   public static void main(String[] args)
   {
      char grade = 'A';
      switch(grade) {
          case 'A' :
              System.out.println("Distinction.");
              break;
          case 'B' :
          case 'C' :
              System.out.println("First class.");
              break;
          case 'D' :
              System.out.println("You have passed.");
          case 'F' :
              System.out.println("Fail. Try again.");
              break;
          default :
              System.out.println("Invalid grade");
      }
      System.out.println("Grade is: " + grade);
   }
}

Example 3: switch expression java

System.out.println(
        switch (day) {
            case MONDAY, FRIDAY, SUNDAY -> 6;
            case TUESDAY                -> 7;
            case THURSDAY, SATURDAY     -> 8;
            case WEDNESDAY              -> 9;
            default -> throw new IllegalStateException("Invalid day: " + day);
        }
    );