클래스 (Class)
public class Person {
// 속성
String name;
int age;
// 메서드
void eat() {
System.out.println(name + " is eating.");
}
void walk() {
System.out.println(name + " is walking.");
}
}
객체 (Object)
// Person 클래스를 기반으로 객체 생성
Person person1 = new Person();
Person person2 = new Person();
객체의 특징
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class Main {
static class Member {
int age;
String name;
public Member(int age, String name) {
this.age = age;
this.name = name;
}
}
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int N = Integer.parseInt(br.readLine()); // 테스트 수
List<Member> list = new ArrayList<>();
for (int i = 0; i < N; i++) {
String[] str = br.readLine().split(" ");
int age = Integer.parseInt(str[0]);
String name = str[1];
list.add(new Member(age, name));
}
Collections.sort(list, (m1, m2) -> Integer.compare(m1.age, m2.age));
StringBuilder sb = new StringBuilder();
for (Member mem : list) {
sb.append(mem.age).append(" ").append(mem.name).append("\n");
}
System.out.print(sb.toString());
}
}