会python真的可以为所欲为0(回)
403天前
这里还有人吗1(回)
589天前这里还有人吗0(回)
589天前
每天面对着电脑屏幕，敲打键盘。我所面对的并不只是代码，而是一种生活方式。0(回)
813天前到处都是羊，不想上班0(回)
893天前
鸽子
0(回)
897天前1.主类 |
package s0224TreeMap; |
import java.util.TreeMap; |
//TreeMap的键必须可排序,要么键是comparable接口实现类的实例,要么给定比较器 |
public class Main { |
public static void main(String [] args){ |
Student a1=new Student("小明",50); |
Student a2=new Student("小张",80); |
Student a3=new Student("小往",90); |
Student a4=new Student("小会",70); |
TreeMap<Student,String> map=new TreeMap<Student, String>( //执行比较 |
(Student s1,Student s2)->s1.getScore()-s2.getScore() ); |
|
map.put(a1,"01"); |
map.put(a2,"01"); |
map.put(a3,"01"); |
map.put(a4,"01"); |
System.out.println(map.keySet()); |
} |
} |
2.Student类 |
package s0224TreeMap; |
public class Student { |
private String name; |
private int score; |
|
|
public Student(String name, int score) { |
super(); |
this.name = name; |
this.score = score; |
} |
public String toString() |
{ |
return this.name+" 成绩"+this.score+"\n"; |
} |
public String getName() { |
return name; |
} |
public void setName(String name) { |
this.name = name; |
} |
public int getScore() { |
return score; |
} |
public void setScore(int score) { |
this.score = score; |
} |
|
} |
