public class Student {
private static int grade; // static 빼먹음!!!!
private int classroom;
private String name;
private double height;
private char gender;
public String information;
{ // this. 넣어주기
this.grade = 1;
this.classroom = 2;
this.name = "박머루";
this.height = 157.5;
this.gender = 'F';
}
public Student (){}
public void setGrade(int grade) {
this.grade = grade;
}
public void setClassroom(int classroom) {
this.classroom = classroom;
}
public void setName(String name) {
this.name = name;
}
public void setHeight(double height) {
this.height = height;
}
public void setGender(char gender) {
this.gender = gender;
}
public int getGrade() {
return this.grade;
}
public int getClassroom() {
return this.classroom;
}
public String getName() {
return this.name;
}
public double getHeight() {
return this.height;
}
public char getGender() {
return this.gender;
}
public void information() {
System.out.println("학년 : " + this.grade + "\n반 : " + this.classroom + "\n이름 : " + this.name
+ "\n키 : " + this.height + "\n성별 : " + this.gender);
}
}
--------------------------------------------------------------------------------------------
public class Run {
public static void main(String[] args) {
Student s = new Student();
s.information();
문제2)
public class Book {
private String title;
private String publisher;
private String author;
private int price;
private double discountRate;
public Book() {}
public Book(String title, String publisher, String author) {
this.title = title;
this.publisher = publisher;
this.author = author;
}
public Book(String title, String publisher, String author, int price, double discountRate) {
this.title = title;
this.publisher = publisher;
this.author = author;
this.price = price;
this.discountRate = discountRate;
}
// 게터세터 없어도 됨...ㅠㅠ
/* public void setTitle(String title) {
this.title = title;
}
public void setPublisher(String publisher) {
this.publisher = publisher;
}
public void setAuthor(String author) {
this.author = author;
}
public void setPrice(int price) {
this.price = price;
}
public void setDiscountRate(double discountRate) {
this.discountRate = discountRate;
}
public String getTitle() {
return this.title;
}
public String getPublisher() {
return this.publisher;
}
public String getAuthor() {
return this.author;
}
public int getPrice() {
return this.price;
}
public double getDiscountRate() {
return this.discountRate;
}
*/
public void Information() {
if(price != 0) {
System.out.println(title + "\n" + publisher + "\n" + author + "\n" + price + "\n" + discountRate);
}else if(title != null) {
System.out.println(title + "\n" + publisher + "\n" + author + "\n");
}else {
System.out.println("정보가 없는 도서입니다\n");
}
}
}
--------------------------------------------------------------------------------------------
public class Run {
public static void main(String[] args) {
Book book = new Book();
Book book2 = new Book("체공녀 강주룡", "한겨레출판사", "박서련");
Book book3 = new Book("밝은 밤", "문학동네", "최은영", 15000, 0.2);
/* book.setTitle("불안의 서");
book.setPublisher("봄날의 책");
book.setAuthor("페르난두 페소아");
book.setPrice(29000);
book.setDiscountRate(0.2);*/
book.Information();
book2.Information();
book3.Information();
}
문제3)
public class Employee {
private int empNo;
private String empName;
private String dept;
private String job;
private int age;
private char gender;
private int salary;
private double bonusPoint;
private String phone;
private String address;
public Employee() {}
public Employee(int empNo, String empName) {
this.empNo = empNo;
this.empName = empName;
}
public Employee(int empNo, String empName, String dept, String job, int age, char gender, int salary) {
this(empNo, empName); // 16행 생성자를 호출한다
/* this.empNo = empNo;
this.empName = empName; */ //19, 20행과 동일한 코드
this.dept = dept;
this.job = job;
this.age = age;
this.gender = gender;
this.salary = salary;
}
public void setEmpNo(int empNo) {
this.empNo = empNo;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public void setDept(String dept) {
this.dept = dept;
}
public void setJob(String job) {
this.job = job;
}
public void setAge(int age) {
this.age = age;
}
public void setGender(char gender) {
this.gender = gender;
}
public void setSalary(int salary) {
this.salary = salary;
}
public void setBonusPoint(double bonusPoint) {
this.bonusPoint = bonusPoint;
}
public void setPhone(String phone) {
this.phone = phone;
}
public void setAddress(String address) {
this.address = address;
}
public int getEmpNo(){
return this.empNo;
}
public String getEmpName() {
return this.empName;
}
public String getDept() {
return this.dept;
}
public String getJob() {
return this.job;
}
public char getGender() {
return this.gender;
}
public int getSalary() {
return this.salary;
}
public double getBonusPoint() {
return this.bonusPoint;
}
public String getPjone() {
return this.phone;
}
public String getAddress() {
return this.address;
}
public void Information() {
System.out.println(empNo + empName + dept + job + gender + salary + bonusPoint + phone + address);
}
}
------------------------------------------------------------------------------------------------
public class Run {
public static void main(String[] args) {
Employee employee = new Employee();
employee.setEmpNo(100);
employee.setEmpName("홍길동");
employee.setDept("영업부");
employee.setJob("과장");
employee.setAge(25);
employee.setGender('M');
employee.setSalary(2500000);
employee.setBonusPoint(0.05);
employee.setPhone("010-1234-5678");
employee.setAddress("서울시 강남구");
employee.Information();
}
}
문제4) 사용자가 배열의 길이를 직접 입력하여 그 값만큼 정수형 배열을 할당하고, 배열의 크기만큼 사용자가 값을 직접 입력하여 인덱스에 값을 초기화하기, 그리고 배열 전체 값을 나열하고 각 인덱스에 저장된 값의 합 출력
public void SumArray(){
Scanner sc = new Scanner(System.in);
System.out.println("배열의 길이를 입력하세요");
int num = sc.nextInt();
int[]arr = new int[num];
int sum = 0;
for(int i = 0; i < num; i++) {
System.out.println(i + "번째 인덱스에 넣을 값을 입력하세요");
arr[i] = sc.nextInt();
sum += arr[i];
}
for(int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + " ");
}
// System.out.println(Arrays.toString(arr));
System.out.println("\n총 합 : " + sum);
}
문제5) 사용자에게 문자열을 입력받아 문자 하나하나를 배열에 넣고, 검색할 문자가 문자열에 몇 개 들어가 있는지 개수와 몇 번째 인덱스에 위치하는지 인덱스 출력하기
public void CharIndex() {
Scanner sc = new Scanner(System.in);
System.out.println("문자열을 입력하세요");
String str = sc.next();
System.out.println("검색할 문자를 입력하세요");
char ch = sc.next().charAt(0);
char[] arr = new char [str.length()];
int count = 0;
System.out.print(str + "에서 " + ch + "(이)가 존재하는 위치 : ");
for(int i = 0; i < str.length(); i++) {
arr[i] = str.charAt(i);
if(arr[i] == ch) {
System.out.print(i + " ");
count ++;
}
}
System.out.println("\n" + ch + " 의 개수 : " + count);
}
