完善随机生成不重复学生ID并排序
来源：6-8 学生选课--- 实现学生序列排序
cloudddd_
2016-01-29 10:31
public class CollectionSort {
public void sort3(){
List<Student> studentList = new ArrayList<Student>();
List<Integer> i = new ArrayList<Integer>();
Random r = new Random();
int n;
for(int j=0;j<3;j++){
do{
n = r.nextInt(1000);
}while(i.contains(n));
i.add(n);
}
studentList.add(new Student(i.get(0).toString(),"小明"));
studentList.add(new Student(i.get(1).toString(),"小红"));
studentList.add(new Student(i.get(2).toString(),"小刚"));
System.out.println("---------排序前----------");
for (Student student : studentList) {
System.out.println("学生："+student.id+"."+student.name);
}
Collections.sort(studentList);
System.out.println("---------排序后----------");
for (Student student : studentList) {
System.out.println("学生："+student.id+"."+student.name);
}
}
public static void main(String[] args) {
CollectionSort cs = new CollectionSort();
cs.sort3();
}
}
多多指教！
写回答
关注
6回答
-
- EKKOY
- 2017-02-15 09:35:18
好想法，比我想的要简单
-
- 不看6324不混吃等死
- 2017-01-21 03:24:23
学到了，你那种方法也不错
-
- 不看6324不混吃等死
- 2017-01-21 03:24:00
public void testSort3(){ List<Student> studentList =new ArrayList<Student>(); Random random =new Random(); Integer a = 10001; Integer[] readNums = new Integer[3]; for(int i=0;i<3;i++){ do{k=random.nextInt(1000); }while( a==k); a=k; readNums[i]=k; } studentList.add(new Student(readNums[0]+"","小明")); studentList.add(new Student(readNums[1]+"","小红")); studentList.add(new Student(readNums[2]+"","小兰")); System.out.println("--------排列前-----------"); for (Student student : studentList) { System.out.println("学生:"+student.name); } Collections.sort(studentList); } -
- 不看6324不混吃等死
- 2017-01-21 03:23:20
public void testSort3(){
List<Student> studentList =new ArrayList<Student>();
Random random =new Random();
Integer a = 10001;
Integer[] readNums = new Integer[3];
for(int i=0;i<3;i++){
do{k=random.nextInt(1000);
}while( a==k);
a=k;
readNums[i]=k;
}
studentList.add(new Student(readNums[0]+"","小明"));
studentList.add(new Student(readNums[1]+"","小红"));
studentList.add(new Student(readNums[2]+"","小兰"));
System.out.println("--------排列前-----------");
for (Student student : studentList) {
System.out.println("学生:"+student.name);
}
Collections.sort(studentList);
}
-
- gank
- 2016-06-19 09:59:10
不知有没有更简单的方法来实现
-
- 第三个笨蛋
- 2016-01-29 10:41:48
学习了。感觉对于对象引用名称的定义要更详细点。一个i，一个n感觉不太好。
Java入门第三季
Java中你必须懂得常用技能，不容错过的精彩，快来加入吧
409792 学习 · 4340 问题
相似问题