打印数组列表中布尔值响应的相反部分

Question

我正在做一个保护动物的项目。预订动物时，我想打印一份可预订动物的名单。数组列表有几个元素，包括名称和是否保留。我想我需要的是打印可用的生物。我对使用Java非常陌生，这个网站给了我很大的帮助，但是我似乎找不到任何我想要的方法。

initializeDogList();
initializeMonkeyList();

// Adds dogs to a list for testing
public static void initializeDogList() {
Dog dog1 = new Dog("Spot", "German Shepherd", "male", "1", "25.6", "05-12-2019", "United States", "in service", false, "United States");
Dog dog2 = new Dog("Rex", "Great Dane", "male", "3", "35.2", "02-03-2020", "United States", "Phase I", false, "United States");
Dog dog3 = new Dog("Bella", "Chihuahua", "female", "4", "25.6", "12-12-2019", "Canada", "in service", true, "Canada");
dogList.add(dog1);
dogList.add(dog2);
dogList.add(dog3);
}
// Adds monkeys to a list for testing
//Optional for testing
public static void initializeMonkeyList() {
Monkey monkey1 = new Monkey("Clyde", "Guenon", "5.1", "8.4", "19.6", "male", "2", "15.3", "08-21-2019", "Australia", "Phase III", true, "Canada");
Monkey monkey2 = new Monkey("Chia", "Macaque", "4.8", "10.2", "19.3", "female", "1", "13.4", "11-15-2018", "United Kingdom", "in service", false, "United Kingdom");
Monkey monkey3 = new Monkey("Pat", "Tamarin", "5.5", "10.6", "13.7", "female", "3", "18.2", "01-04-2021", "United States", "intake", false, "United States");
monkeyList.add(monkey1);
monkeyList.add(monkey2);
monkeyList.add(monkey3);
}

public static void reserveAnimal(Scanner scanner) {
System.out.println("Enter the animal type");
String type = scanner.nextLine();
if (type.equals("Monkey") || type.equals("monkey")) {
for (int i = 0; i < monkeyList.size(); i++) {
if (monkeyList.get(i).getReserved());
System.out.println(monkeyList.get(i));
}
System.out.println("Enter name: ");
String name = scanner.nextLine();
for (Monkey obj: monkeyList) {
if (obj.name.equals(name)) {
obj.reserved = true;
return;
}
}
System.out.println("Sorry that Monkey is not in our list");
}
if (type.equals("Dog") || type.equals("dog")) {
for (int i = 0; i < dogList.size(); i++) {
if (dogList.get(i).getReserved())
System.out.println(dogList.get(i));
}
System.out.println("Enter name: ");
String name = scanner.nextLine();
for (Dog obj: dogList) {
if (obj.name.equals(name)) {
obj.reserved = true;
return;
}
}
System.out.println("Sorry that Dog is not in our list");
}
}

Answer 1

如果您想还原布尔值，只需在其前面使用!(也称为NOT条件)。

。

!monkeyList.get(i).getReserved()

Answer 2

我不确定我是否理解你的问题，但如果你想反转一个布尔变量简单使用!variable。