[java] List Collection Framework

[java] List Collection Framework

자바 잼있네요!

test.java

 

import java.util.ArrayList;
import java.util.List;

class coorlist
{
	public int x;
	public int y;
}

public class test
{	
	public static void main(String[] args) 
	{
		int i,j;
		int count = 0;
		//
		List< List > wlist = new ArrayList < List >(10);
		
		// -------------------------------------------------------
		// input
		// -------------------------------------------------------
		for( i=0; i<10; i++) {
			//List al =  (List)wlist.get(i);
			
			List list = new ArrayList();
			// input 1
			coorlist cl = new coorlist();
			cl.x = count;
			cl.y = count++;
			list.add(cl);
			
			// input 2
			cl = new coorlist();
			cl.x = count;
			cl.y = count++;
			list.add(cl);
			
			wlist.add( list );
		}
		
		// -------------------------------------------------------
		// output
		// -------------------------------------------------------
		for( i=0; i<10; i++) {
			List al = (List)wlist.get(i);
			
			System.out.println( "=== Num " + i + "번째 ===" );			
                        for( j=0; j<al.size(); j++ ) {
				coorlist cl = (coorlist)al.get(j);
				
				System.out.println( "j = " + j + " : x = " + cl.x + ", y = " + cl.y );
			}
		}
	}
}


// 안없어지네요 ㅜㅜ...에러들이.... 

결과입니다.

=== Num 0번째 ===

j = 0 : x = 0, y = 0

j = 1 : x = 1, y = 1

=== Num 1번째 ===

j = 0 : x = 2, y = 2

j = 1 : x = 3, y = 3

=== Num 2번째 ===

j = 0 : x = 4, y = 4

j = 1 : x = 5, y = 5

=== Num 3번째 ===

j = 0 : x = 6, y = 6

j = 1 : x = 7, y = 7

=== Num 4번째 ===

j = 0 : x = 8, y = 8

j = 1 : x = 9, y = 9

=== Num 5번째 ===

j = 0 : x = 10, y = 10

j = 1 : x = 11, y = 11

=== Num 6번째 ===

j = 0 : x = 12, y = 12

j = 1 : x = 13, y = 13

=== Num 7번째 ===

j = 0 : x = 14, y = 14

j = 1 : x = 15, y = 15

=== Num 8번째 ===

j = 0 : x = 16, y = 16

j = 1 : x = 17, y = 17

=== Num 9번째 ===

j = 0 : x = 18, y = 18

j = 1 : x = 19, y = 19