마지막

src/main/java/com/ohgiraffers/leedongryeol/api/Practice1.java

@@ -0,0 +1,48 @@
+package com.ohgiraffers.leedongryeol.api;
+
+public class Practice1 {
+    public static void main(String[] args) {
+        Practice1 p1 = new Practice1();
+
+        String s = p1.preChar("hello world");
+        System.out.println(s);
+
+        int n = p1.charSu("application car cable", 'c');
+        System.out.println(n);
+    }
+
+
+    // +preChar(String s) :String :> 문자열을 넘겨받아, 첫글자를 대문자로 바꾸는 메서드 작성
+    public String preChar(String s){
+        if (s == null || s.isEmpty()) {
+            return s;
+        }
+
+        return s.substring(0,1).toUpperCase()+s.substring(1);
+    }
+
+
+    // +charSu(String s, char ch):int :> 문자열에서 찾는 문자가 몇 개 포함되어 있는지 반환하는 메서드 작성
+    public int charSu(String s, char ch){
+        if (s == null || s.isEmpty()) {
+            return 0;
+        }
+
+        int cnt=0;
+        for (int i=0; i<s.length(); i++){
+            if (s.charAt(i)==ch){
+                cnt++;
+            }
+        }
+
+        return cnt;
+    }
+       // 출력예시
+    /*
+    *
+    *    Hello world
+    *    3
+    * */
+
+
+}

src/main/java/com/ohgiraffers/leedongryeol/collection/Customer.java

@@ -0,0 +1,66 @@
+package com.ohgiraffers.leedongryeol.collection;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+
+public class Customer implements Comparator<Customer> {
+    private String name;
+    private int age;
+    private char gender;
+    private double point;
+
+    public Customer() {};
+    public Customer(String name, int age, char gender, double point) {
+        this.name = name;
+        this.age = age;
+        this.gender = gender;
+        this.point = point;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public char getGender() {
+        return gender;
+    }
+
+    public void setGender(char gender) {
+        this.gender = gender;
+    }
+
+    public double getPoint() {
+        return point;
+    }
+
+    public void setPoint(double point) {
+        this.point = point;
+    }
+
+    @Override
+    public String toString() {
+        return "Customer{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                ", gender=" + gender +
+                ", point=" + point +
+                '}';
+    }
+
+    @Override
+    public int compare(Customer o1, Customer o2) {
+        return Integer.compare(o1.getAge(), o2.getAge());
+    }
+}

src/main/java/com/ohgiraffers/leedongryeol/collection/Practice1.java

@@ -0,0 +1,73 @@
+package com.ohgiraffers.leedongryeol.collection;
+
+import java.util.*;
+
+public class Practice1 {
+    public static void main(String[] args) {
+        /*
+         * 다음 데이터를 처리할 Customer클래스를 설계하고 아래의 요구사항을 구현하세요.
+         * =============================================================
+         * 이름	   나이	 성별	포인트
+         * =============================================================
+         * 홍길동	25	  남	1250.5
+         * 박문수	33	  남	3457.8
+         * 김춘추	38	  남	2485.6
+         * 신사임당	43	  여	2300.9
+         * =============================================================
+         * com.ohgiraffers.성함.collection.Customer <- 데이터를 담을 클래스를 생성
+         * com.ohgiraffers.성함.collection.Practice1 <- 실행용클래스
+         *
+         *
+         * [요구사항]
+         * 1. 위 표에 제시한 순서대로 데이터를 List에 추가하세요.
+         * 2. 위 리스트에 다음 데이터를 맨앞에 추가하세요.
+         * ----------------------------------------------------------
+         * 이황 66 남 9999.9
+         * ----------------------------------------------------------
+         * 3. 고객 이름 가나다순으로 정렬해서 출력하세요.
+         * 4. 나이 오름차순으로 정렬해서 출력하세요.
+         * */
+        Customer cs = new Customer();
+        List<Customer> customers = new ArrayList<>();
+        customers.add(new Customer("홍길동",25,'남',1250.5));
+        customers.add(new Customer("박문수",33,'남',3457.8));
+        customers.add(new Customer("김춘추",38,'남',2458.6));
+        customers.add(new Customer("신사임당",43,'여',2300.9));
+
+        for(Customer customer : customers){
+            System.out.println("customer = " + customer);
+        }
+
+        System.out.println("==");
+
+        customers.add(0, new Customer("이황", 66, '남', 9999.9));
+
+        for(Customer customer : customers){
+            System.out.println("customer = " + customer);
+        }
+
+        System.out.println("==");
+
+        Collections.sort(customers, new Comparator<Customer>() {
+            @Override
+            public int compare(Customer o1, Customer o2) {
+                return o1.getName().compareTo(o2.getName());
+            }
+        });
+
+        for(Customer customer : customers){
+            System.out.println("customer = " + customer);
+        }
+
+        System.out.println("==");
+
+        customers.sort(new Customer());
+
+        for(Customer customer : customers){
+            System.out.println("customer = " + customer);
+        }
+
+
+    }
+
+}

src/main/java/com/ohgiraffers/leedongryeol/member/Application.java

@@ -0,0 +1,57 @@
+package com.ohgiraffers.leedongryeol.member;
+
+import com.ohgiraffers.meta.member.MemberDTO;
+
+public class Application {
+
+    public static void main(String[] args) {
+
+        System.out.println();
+
+
+
+        // 객체생성
+        com.ohgiraffers.meta.member.MemberDTO member = new com.ohgiraffers.meta.member.MemberDTO();
+        member.getAge(); // 재사용해야할경우 주소값을
+
+        new com.ohgiraffers.meta.member.MemberDTO().setAge(10);
+
+        com.ohgiraffers.meta.member.MemberDTO member2 = new com.ohgiraffers.meta.member.MemberDTO();
+        System.out.println(member2.getId());
+        System.out.println(member2.getName());
+        System.out.println(member2.getAge());
+        System.out.println(member2.getPwd());
+
+        member2.setAge(10);
+        System.out.println("=======> " + member2.getAge());
+
+        com.ohgiraffers.meta.member.MemberDTO memberDTO = new MemberDTO("user01", "pass01", "홍길동");
+        System.out.println(memberDTO.getInformation());
+
+
+
+    }
+
+
+    public void testMethod(String str, String... memberDTOS) {
+
+
+    }
+
+
+//    public MemberDTO getNewMember() {
+//
+////        int i;
+////        System.out.println("i = " + i);
+////        return new MemberDTO();
+//
+//    }
+
+    public void bestMethod(int i) {
+        System.out.println(i);
+    }
+
+    public void bestMethod(String s) {
+
+    }
+}

src/main/java/com/ohgiraffers/leedongryeol/member/MemberDTO.java

@@ -0,0 +1,108 @@
+package com.ohgiraffers.leedongryeol.member;
+
+public class MemberDTO {
+
+    private String id;
+    private String pwd;
+    private String name;
+    private int age;
+    private char gender;
+    private String phone;
+    private String email;
+
+    public MemberDTO() {
+    }
+
+    public MemberDTO(String id, String pwd, String name) {
+        this.id = id;
+        this.pwd = pwd;
+        this.name = name;
+    }
+
+    public MemberDTO(String id, String pwd, String name, int age) {
+
+        this(id, pwd, name);
+        this.age = age;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getPwd() {
+        return pwd;
+    }
+
+    public void setPwd(String pwd) {
+        this.pwd = pwd;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public char getGender() {
+        return gender;
+    }
+
+    public void setGender(char gender) {
+        this.gender = gender;
+    }
+
+    public String getPhone() {
+        return phone;
+    }
+
+    public void setPhone(String phone) {
+        this.phone = phone;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getInformation() {
+        return "[" +
+                "id='" + id + '\'' +
+                ", pwd='" + pwd + '\'' +
+                ", name='" + name + '\'' +
+                ", age=" + age +
+                ", gender=" + gender +
+                ", phone='" + phone + '\'' +
+                ", email='" + email + '\'' +
+                ']';
+    }
+
+    @Override
+    public String toString() {
+        return "MemberDTO{" +
+                "id='" + id + '\'' +
+                ", pwd='" + pwd + '\'' +
+                ", name='" + name + '\'' +
+                ", age=" + age +
+                ", gender=" + gender +
+                ", phone='" + phone + '\'' +
+                ", email='" + email + '\'' +
+                '}';
+    }
+}