題目

代碼

package lesson.l10_oop;/*** Illustration** @author DengQing* @version 1.0* @datetime 2022/7/1 9:57* @function*/
public class Student {int number;int state;int score;public static final int NUM = 20;public static void main(String[] args) {
//        對象數組Student[] students = new Student[NUM];for (int i = 0; i < NUM; i++) {
//            給數組元素賦值students[i] = new Student();
//            給Student對象的屬性賦值students[i].number = i + 1;
//            [1-9]:(_9-1+1)+1students[i].state = (int) (Math.random() * 9) + 1;
//            [0-100]students[i].score = (int) (Math.random() * 99);}Student student = new Student();
//        查找學生信息student.searchState(students, 3);
//        冒泡排序student.bubbleSort(students);student.print(students);}//    查找學生信息public void searchState(Student[] students, int state) {System.out.println(state + "年紀的學生信息：");for (Student s :students) {if (s.state == state) {System.out.print(s.toString() + "\n");}}}//    打印數組public void print(Student[] students) {for (Student s :students) {System.out.println(s.toString());}}//冒泡排序public void bubbleSort(Student[] students) {System.out.println("冒泡排序：");for (int i = 0; i < students.length - 1; i++) {for (int j = 0; j < students.length - 1 - i; j++) {if (students[j].score > students[j + 1].score) {Student temp = students[j];students[j] = students[j + 1];students[j + 1] = temp;}}}}//交換public void exchange(Student a, Student b) {a.number = a.number ^ b.number;b.number = a.number ^ b.number;a.number = a.number ^ b.number;a.state = a.state ^ b.state;b.state = a.state ^ b.state;a.state = a.state ^ b.state;a.score = a.score ^ b.score;b.score = a.score ^ b.score;a.score = a.score ^ b.score;}//打印Student@Overridepublic String toString() {return "Student{" +"number=" + number +", state=" + state +", score=" + score +'}';}
}

內存解析