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我已经创建了ArrayList,并且我想使用二进制搜索通过注册号搜索狗的详细信息。我尝试使用Collections.binarySearch
,但无法弄清楚。如何使用注册号码搜索狗的详细信息,如姓名和品种?通过BinarySearch在ArrayList中搜索
DogSort.java
public class DogSort {
private static Scanner scanner = new Scanner(System.in);
public static void main(String[] args) {
ArrayList<Dog> listDog = new ArrayList<Dog>();
listDog.add(new Dog("Max", "German Shepherd", "1001"));
listDog.add(new Dog("Gracie","Rottweiler","1003"));
listDog.add(new Dog("Sam", "Beagle", "1002"));
}
}
Dog.java
class Dog {
private String name;
private String breed;
private String registrationNumber;
public Dog(String name, String breed, String registrationNumber) {
this.name = name;
this.breed = breed;
this.registrationNumber = registrationNumber;
}
public String getName() {
return this.name;
}
public String getBreed() {
return this.breed;
}
public String getRegistrationNumber() {
return this.registrationNumber;
}
public void setName(String name) {
this.name = name;
}
public void setBreed(String breed) {
this.breed = breed;
}
public void setRegistrationNumber(String registrationNumber) {
this.registrationNumber = registrationNumber;
}
@Override
public String toString() {
return this.name;
}
}
https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#binarySearch-java.util.List-T-java.util.Comparator-该部分是目前还不清楚?你尝试了什么代码? – markspace
我曾尝试阅读Oracle文档,然后发布了问题。如果我不明白doc,我不应该在这里发表问题吗? – jParmar
我试过'Collections.binarySearch(listDog,“1002”);'但它不会工作,因为我知道它应该与Dog类的参数匹配,但我不知道如何仅通过一个参数进行搜索? – jParmar