167 - 学生列表

[java]代码库

import java.util.*;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;

public class Main {
	public static void main(String[] args) throws ParseException
	{
		Scanner scan = new Scanner(System.in);

		int num = scan.nextInt();
		List<Student> slist = new ArrayList<Student>(); 
		for(int i = 0; i < num; i++ )
		{
			int no = scan.nextInt();
			String name = scan.next();
			int score = scan.nextInt();
			Student s = new Student(no,name,score);
			slist.add(s);
		}
		num = scan.nextInt();
		
		for(int i = 0; i < num; i++ )
		{
			String operate = scan.next();
			if(operate.equals("add"))//要用equals，不能用==
			{
				int no = scan.nextInt();
				String name = scan.next();
				int score = scan.nextInt();
				Student s = new Student(no,name,score);
				slist.add(s);
			}
			else if(operate.equals("delete"))
			{
				int no = scan.nextInt();
				for( int j = 0; j < slist.size(); j++)
				{
					if(slist.get(j).getno() == no)
						slist.remove(j);
				}
			}
			else if(operate.equals("set"))
			{
				int no = scan.nextInt();
				int score = scan.nextInt();
				for( int j = 0; j < slist.size(); j++)
				{
					if(slist.get(j).getno() == no)
						slist.get(j).setscore(score);
				}
			}
		}
		for( int j = 0;j < slist.size();j++)
			System.out.println(slist.get(j).toString());
	}
}
class Student
{
	private int no;
	private String name;
	private int score;
	public int getno()
	{
		return no;
	}
	public void setscore(int a)
	{
		score = a;
	}
	public Student(int a, String b, int c)
	{
		no = a;
		name = b;
		score = c;
	}
	public String toString()
	{
		return "no:"+no+" name:"+name+" score:"+score;
	}
}