정렬

package test;
 
import java.util.Arrays;
import java.util.Comparator;
 
public class test {
    public static class Chemi implements Comparable<Chemi>{
        int x;
        int y;
        public Chemi(int x, int y) {
            super();
            this.x = x;
            this.y = y;
        }
        @Override
        public int compareTo(Chemi o) {
            // TODO Auto-generated method stub
            if(this.y >o.y) {
                return 1;
            }
            else{
                return -1;
            }
        }
        
    }
    
    public static void main(String[] args) {
        Chemi chemi[] = new Chemi[4];
        
        
        chemi[0] = new Chemi(-10, 5);
        chemi[1] = new Chemi(125, 755);
        chemi[2] = new Chemi(765, 7653);
        chemi[3] = new Chemi(-12, 344);
        
        Arrays.sort(chemi);
        
        for(int i=0;i<4;i++) {
            System.out.println(chemi[i].x +" "+chemi[i].y);
        }
    }
}