crwdns149843:0crwdne149843:0

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crwdns149847:0crwdne149847:0

crwdns149849:0crwdne149849:0

Optional<String> opt = getOptionalString();
String wrappedString = opt.get();

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Optional<String> opt = getOptionalString();
if (opt.isPresent()) {
    String wrappedString = opt.get();
    // more code
}

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Optional<String> optionalString = optionalString();
String someString;
if (optionalString.isPresent()) {
    someString = optionalString.get();
} else {
    someString = DEFAULT_STRING;
}

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String someString = getOptionalString().orElse(DEFAULT_STRING);

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Optional<String> optionalString = optionalString();
String someString;
if (optionalString.isPresent()) {
    someString = optionalString.get();
} else {
    someString = myPlugin.defaultString();
}

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String someString = getOptionalString().orElseGet(myPlugin::defaultString);

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Optional<String> optionalString = optionalString();
if (!optionalString.isPresent()) {
    throw new MyException();
}
String someString = optionalString.get();

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String someString = getOptionalString().orElseThrow(MyException::new);

Note

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crwdns149879:0crwdne149879:0

crwdns149881:0crwdne149881:0

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Optional<String> optionalString = getOptionalString();
if (optionalString.isPresent()) {
    myPlugin.doSomethingWithString(optionalString.get());
}

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Optional<String> optionalString = getOptionalString();
optionalString.ifPresent(s -> myPlugin.doSomethingWithString(s));

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getOptionalString().ifPresent(myPlugin::doSomethingWithString);

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crwdns149887:0crwdne149887:0

crwdns149863:0crwdne149863:0

Optional<String> optionalString = getOptionalString();
if (optionalString.isPresent()) {
    String someString = optionalString.get();
    if (stringTester.isPalindromic(someString)) {
        myPlugin.doSomethingWithString(someString);
    }
}

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getOptionalString()
      .filter(stringTester::isPalindromic)
      .ifPresent(myPlugin::doSomethingWithString);

Note

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crwdns149891:0crwdne149891:0

crwdns149893:0crwdne149893:0

crwdns149863:0crwdne149863:0

Optional<String> optionalString = getOptionalString();
if (optionalString.isPresent()) {
    String someString = optionalString.toLowerCase();
    myPlugin.doSomethingWithString(someString);
}

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getOptionalString()
      .map(s -> s.toLowerCase())
      .ifPresent(myPlugin::doSomethingWithString);

Tip

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crwdns149897:0crwdne149897:0

crwdns149899:0crwdne149899:0

• crwdns149901:0crwdne149901:0

• crwdns149903:0crwdne149903:0

• crwdns149905:0crwdne149905:0

crwdns149907:0crwdne149907:0

if (optionalPlayer.isPresent()) {
    Player player = optionalPlayer.get();
    Optional<Pet> optionalPet = petRegistry.getPetForPlayer(player);
    if (optionalPet.isPresent()) {
        Pet pet = optionalPet.get();
        if (petHelper.canSpawn(pet)) {
            petHelper.spawnPet(pet);
        }
    }
}

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optionalPlayer
      .flatMap(petRegistry::getPetForPlayer)
      .filter(petHelper::canSpawn)
      .ifPresent(petHelper::spawnPet);

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