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[英]Java Linked List of Objects. How can I keep count of each unique object?
[英]How can I keep a object in linked list node?
我有一個項目,項目想要一個學生管理系統。 我開始做。 每個學生必須有 3 個屬性(id、name、surname),我必須在鏈表中保留一個節點。 如何將這 3 個屬性保留在一個節點中,以及如何建立該連接?
在 Java 中閱讀有關 Inheritance、Generics 的信息。 你可以這樣做:
List<Student> students = new LinkedList<>();
students.add(new Student(1, "name1", "surname1"));
students.add(new Student(2, "name2", "surname2"));
students.add(new Student(3, "name3", "surname3"));
並像這樣打印它們:
for (Student student : students) {
System.out.println(student);
}
和學生 class:
public static class Student {
private long id;
private String name;
private String surname;
public Student(long id, String name, String surname) {
this.id = id;
this.name = name;
this.surname = surname;
}
@Override
public String toString() {
return "Student{" +
"id=" + id +
", name='" + name + '\'' +
", surname='" + surname + '\'' +
'}';
}
}
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