$$config title: [백준] 11단계 정렬 keywords: - JAVA $$ # 수 정렬하기 ```java import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.util.ArrayList; public class Main { public static void main(String[] args) throws IOException{ ArrayList nums = new ArrayList<>(); BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String str = ""; int T = Integer.parseInt(br.readLine()); for(int i=0; i nums = new ArrayList<>(); int N = Integer.parseInt(br.readLine()); while(N!=0){ nums.add(N%10); N/=10; } Collections.sort(nums); for (int i=nums.size()-1; i>=0; i--){ bw.write(String.valueOf(nums.get(i))); } bw.flush(); } } ``` # 좌표 정렬하기 ```java import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); int N = Integer.parseInt(br.readLine()); int[][] nums = new int[N][2]; for (int i = 0; i < N; i++) { StringTokenizer st = new StringTokenizer(br.readLine()); int a = Integer.parseInt(st.nextToken()); int b = Integer.parseInt(st.nextToken()); nums[i][0] = a; nums[i][1] = b; } Arrays.sort(nums, Comparator.comparing(st -> st[1])); Arrays.sort(nums, Comparator.comparing(st -> st[0])); for (int i = 0; i < N; i++) { bw.write(String.valueOf(nums[i][0]) + " " + String.valueOf(nums[i][1])); bw.newLine(); } bw.flush(); } } ``` # 좌표 정렬하기 2 ```java import java.io.*; import java.util.Arrays; import java.util.Comparator; import java.util.StringTokenizer; public class Main { public static void main(String[] args) throws IOException{ BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); int N = Integer.parseInt(br.readLine()); int[][] nums = new int[N][2]; for(int i=0; i() { @Override public int compare(int[] o1, int[] o2) { if (o1[1] == o2[1]) return o1[0] - o2[0]; else return o1[1] - o2[1]; } }); for(int i=0; i