根据学生的年龄和学号进行排序

﹏ヽ暗。殇╰゛Y 2022-04-24 08:28 230阅读 0赞

创建一个Student的类

里面有Id、Age 、Name

根据年龄排序，若年龄相同比较学号。

import java.util.ArrayList;
    import java.util.List;
    //Student类包含学号、姓名、年龄
    class Student {
        private int id;
        private String name;
        private int age;
    	public Student(int id, String name, int age) {
    		
    		this.id = id;
    		this.name = name;
    		this.age = age;
    	}
    	
    	public int getId() {
    		return id;
    	}
    	public void setId(int id) {
    		this.id = id;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public int getAge() {
    		return age;
    	}
    	public void setAge(int age) {
    		this.age = age;
    	}
    	@Override
    	public String toString() {
    		return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
    	}
        
        
    }
    public class StudentSortByAgeId {
    	public static void main(String[] args) {
    		List<Student> list = new ArrayList<Student>();
    		list.add(new Student(168216, "韩一", 19));
    		list.add(new Student(168217, "徐二", 20));
    		list.add(new Student(168212, "张三", 18));
    		list.add(new Student(168214, "李四", 19));
    		list.add(new Student(168213, "王五", 19));
    		// 使用冒泡排序算法
    		for (int i = 0; i < list.size() - 1; i++) {
    			for (int j = 0; j < list.size() - 1 - i; j++) {
    				if (list.get(j).getAge() > list.get(j + 1).getAge()) {
    					Student student = list.get(j);
    					list.set(j, list.get(j + 1));
    					list.set(j + 1, student);
    				} else if (list.get(j).getAge() == (list.get(j + 1).getAge())) {
    					while (list.get(j).getId() > list.get(j + 1).getId()) {
    						Student student = list.get(j);
    						list.set(j, list.get(j + 1));
    						list.set(j + 1, student);
    					}
    				}
    			}
    		}
    		for (Student stu : list) {
    			System.out.println(stu);
    		}
    	}
    
    }