The enhancement of switch in Java 14, finally can not write break

Faced with such a if statement, do you feel uncomfortable?

 if (flag == 1) {
  log.info("didispace.com: 1");
} else if (flag == 2) {
  log.info("didispace.com: 2");
} else if (flag == 3) {
  log.info("didispace.com: 3");
} else if (flag == 4) {
  log.info("didispace.com: 4");
} else {
  log.info("didispace.com: x");
}

Are you thinking of using switch to improve it?

 switch(flag) {
  case 1: 
    log.info("didispace.com: 1"); 
    break;
  case 2:
    log.info("didispace.com: 2");
    break;
  case 3:
    log.info("didispace.com: 3");
    break;
  case 4:
    log.info("didispace.com: 4");
    break;
  default:
    log.info("didispace.com: x");
}

Are you comfortable? Do you still feel uncomfortable?

Try out the enhancements to Switch expressions in Java 14 and continue the transformation:

 switch(flag) {
  case 1  -> log.info("didispace.com: 1");
  case 2  -> log.info("didispace.com: 2");
  case 3  -> log.info("didispace.com: 3");
  case 4  -> log.info("didispace.com: 4");
  default -> log.info("didispace.com: x");
}

Are you comfortable now? In Java 14's switch expression enhancements, support for Lambda syntax was introduced, making each case branch more concise. At the same time, the easy to forget break can also be omitted.

Tips: The JEP 361 feature here was finalized in JDK 14 after two preview versions of JDK 12 and JDK 13, so some functions will also be seen in JDK 12 and JDK 13, but for real use, it is recommended to use JDK 14 and later versions.

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