1 - ② - ⑶ 하나의 패키지 내 서로다른 클래스에서 리턴 있고 입력 없는 메서드 선언 및 호출
서로다른 클래스에서 변수의 접근지정자가 private으로 지정되어 접근 불가할 때
어떻게 변수의 값을 setting / getting 할 수 있을까?
전역변수 하나에 setting method/ getting method를 선언
ex) private String uid;
<setting method>
return data type void
method name setUid
입력개수 1
매개변수 data type String
매개변수 name a
처리 과정 : 입력받은 값을 전역변수uid에 setting
<getting method>
return data type String
method name getUid
입력개수 0
매개변수 data type -
매개변수 name -
처리 과정 : data 영역의 전역변수uid에 담겨있는 값을 리턴
세팅이 된 모습
지역변수 (매개변수) 이름과 전역변수 이름이 같으면 어떻게 될까?
null이 출력된다.
메서드 내부의 지역변수들은 처리 후 데이터가 휘발된다.
this.를 붙이면 세팅이 된다.
1 - ② - ⑷ 하나의 패키지 내 서로다른 클래스에서 리턴 있고 입력 있는 메서드 선언 및 호출
package kr.or.ksmart.A;
public class User {
private String uid;
private String upw;
private String uphone;
private char ugender;
private int uage;
private String ulevel;
public String getUid() {
return uid;
}
public void setUid(String uid) {
this.uid = uid;
}
public String getUpw() {
return upw;
}
public void setUpw(String upw) {
this.upw = upw;
}
public String getUphone() {
return uphone;
}
public void setUphone(String uphone) {
this.uphone = uphone;
}
public char getUgender() {
return ugender;
}
public void setUgender(char ugender) {
this.ugender = ugender;
}
public int getUage() {
return uage;
}
public void setUage(int uage) {
this.uage = uage;
}
public String getUlevel() {
return ulevel;
}
public void setUlevel(String ulevel) {
this.ulevel = ulevel;
}
}
package kr.or.ksmart.A;
public class AA01 {
public static void main(String[] args) {
User u01 = new User();
u01.setUid("id001");
System.out.println(u01.getUid());
u01.setUid("id001");
u01.setUpw("pw001");
u01.setUphone("010-001");
u01.setUgender('남');
u01.setUage(20);
u01.setUlevel("구매자");
uPrint(u01);
User u02 = new User();
u02.setUid("id002");
u02.setUpw ("pw002");
u02.setUphone ("010-002");
u02.setUgender ('여');
u02.setUage (30);
u02.setUlevel ("판매자");
uPrint(u02);
User u03 = new User();
u03.setUid ("id003");
u03.setUpw ("pw003");
u03.setUphone ("010-003");
u03.setUgender ('여');
u03.setUage (31);
u03.setUlevel ("판매자");
uPrint(u03);
User u04 = new User();
u04.setUid ("id004");
u04.setUpw ("pw004");
u04.setUphone ("010-004");
u04.setUgender ('여');
u04.setUage (32);
u04.setUlevel ("관리자");
uPrint(u04);
}
public static void uPrint (User getu){
System.out.println("--- 회원가입 내역 ---");
System.out.println(getu+"<-getu");
System.out.println(getu.getUid() + "<- 아이디");
System.out.println(getu.getUpw() + "<- 비밀번호");
System.out.println(getu.getUphone() + "<- 전화번호");
System.out.println(getu.getUgender() + "<- 성별");
System.out.println(getu.getUage() + "<- 나이");
System.out.println(getu.getUlevel() + "<- 권한");
System.out.println("--- 회원가입 내역 End ---");
}
}
흐름
AA01 Class ← Class 3가지 (User, Goods, Order) 호출
User class code
더보기
package kr.or.ksmart.A;
public class User {
private String uid;
private String upw;
private String uphone;
private char ugender;
private int uage;
private String ulevel;
public String getUid() {
return uid;
}
public void setUid(String uid) {
this.uid = uid;
}
public String getUpw() {
return upw;
}
public void setUpw(String upw) {
this.upw = upw;
}
public String getUphone() {
return uphone;
}
public void setUphone(String uphone) {
this.uphone = uphone;
}
public char getUgender() {
return ugender;
}
public void setUgender(char ugender) {
this.ugender = ugender;
}
public int getUage() {
return uage;
}
public void setUage(int uage) {
this.uage = uage;
}
public String getUlevel() {
return ulevel;
}
public void setUlevel(String ulevel) {
this.ulevel = ulevel;
}
}
Goods class code
더보기
package kr.or.ksmart.A;
public class Goods {
private String pcode ;
private String uid;
private String pname;
private int pjungsang ;
private int phalin;
private String psangse;
public String getPcode() {
return pcode;
}
public void setPcode(String pcode) {
this.pcode = pcode;
}
public String getUid() {
return uid;
}
public void setUid(String uid) {
this.uid = uid;
}
public String getPname() {
return pname;
}
public void setPname(String pname) {
this.pname = pname;
}
public int getPjungsang() {
return pjungsang;
}
public void setPjungsang(int pjungsang) {
this.pjungsang = pjungsang;
}
public int getPhalin() {
return phalin;
}
public void setPhalin(int phalin) {
this.phalin = phalin;
}
public String getPsangse() {
return psangse;
}
public void setPsangse(String psangse) {
this.psangse = psangse;
}
}
Order class code
더보기
package kr.or.ksmart.A;
public class Order {
private String ocode;
private String pcode;
private String uid;
private int ocount;
private int oprice;
private int ototal;
private String oaddress;
public String getOcode() {
return ocode;
}
public void setOcode(String ocode) {
this.ocode = ocode;
}
public String getPcode() {
return pcode;
}
public void setPcode(String pcode) {
this.pcode = pcode;
}
public String getUid() {
return uid;
}
public void setUid(String uid) {
this.uid = uid;
}
public int getOcount() {
return ocount;
}
public void setOcount(int ocount) {
this.ocount = ocount;
}
public int getOprice() {
return oprice;
}
public void setOprice(int oprice) {
this.oprice = oprice;
}
public int getOtotal() {
return ototal;
}
public void setOtotal(int ototal) {
this.ototal = ototal;
}
public String getOaddress() {
return oaddress;
}
public void setOaddress(String oaddress) {
this.oaddress = oaddress;
}
}
AA01 class code
더보기
package kr.or.ksmart.A;
public class AA01 {
public static void main(String[] args) {
User u01 = new User();
u01.setUid("id001");
u01.setUpw("pw001");
u01.setUphone("010-001");
u01.setUgender('남');
u01.setUage(20);
u01.setUlevel("구매자");
uPrint(u01);
User u02 = new User();
u02.setUid("id002");
u02.setUpw ("pw002");
u02.setUphone ("010-002");
u02.setUgender ('여');
u02.setUage (30);
u02.setUlevel ("판매자");
uPrint(u02);
Goods g01 = new Goods();
System.out.println(g01);
g01.setPcode ("p001");
g01.setUid (u02.getUid());
g01.setPname ("노트북");
g01.setPjungsang (2000000);
g01.setPhalin (1000000);
g01.setPsangse ("SW개발용");
gPrint(g01);
Order o01 =new Order();
System.out.println(o01);
o01.setOcode ("o001");
o01.setPcode (g01.getPcode());
o01.setUid (u02.getUid());
o01.setOcount (3);
o01.setOprice (g01.getPjungsang());
o01.setOtotal (o01.getOcount() * o01.getOprice());
o01.setOaddress ("금암동");
oPrint(o01);
User u03 = new User();
u03.setUid ("id003");
u03.setUpw ("pw003");
u03.setUphone ("010-003");
u03.setUgender ('여');
u03.setUage (31);
u03.setUlevel ("판매자");
uPrint(u03);
Goods g02 = new Goods();
g02.setPcode ("p002");
g02.setUid (u03.getUid());
g02.setPname ("선풍기");
g02.setPjungsang (50000);
g02.setPhalin (40000);
g02.setPsangse ("시원해");
gPrint(g02);
Order o02 =new Order();
o02.setOcode("o002");
o02.setPcode (g02.getPcode());
o02.setUid (u03.getUid());
o02.setOcount(5);
o02.setOprice(g02.getPjungsang());
o02.setOtotal(o02.getOcount() * o02.getOprice());
o02.setOaddress ("서신동");
oPrint(o02);
User u04 = new User();
u04.setUid ("id004");
u04.setUpw ("pw004");
u04.setUphone ("010-004");
u04.setUgender ('여');
u04.setUage (32);
u04.setUlevel ("관리자");
uPrint(u04);
Goods g03 = new Goods();
g03.setPcode ("p003");
g03.setUid (u04.getUid());
g03.setPname ("사과박스");
g03.setPjungsang (100000);
g03.setPhalin (80000);
g03.setPsangse ("SW개발용");
gPrint(g03);
Order o03 =new Order();
o03.setOcode ("o003");
o03.setPcode(g03.getPcode());
o03.setUid(u04.getUid());
o03.setOcount(2);
o03.setOprice (g03.getPjungsang());
o03.setOtotal (o03.getOcount() * o03.getOprice());
o03.setOaddress("덕진동");
oPrint(o03);
}
public static void uPrint (User getu){
System.out.println("--- 회원가입 내역 ---");
System.out.println(getu.getUid() + "<- 아이디");
System.out.println(getu.getUpw() + "<- 비밀번호");
System.out.println(getu.getUphone() + "<- 전화번호");
System.out.println(getu.getUgender() + "<- 성별");
System.out.println(getu.getUage() + "<- 나이");
System.out.println(getu.getUlevel() + "<- 권한");
System.out.println("--- 회원가입 내역 End ---");
}
public static void gPrint (Goods getp) {
System.out.println("--- 상품관리 내역 ---");
System.out.println(getp.getPcode());
System.out.println(getp.getUid());
System.out.println(getp.getPname());
System.out.println(getp.getPjungsang());
System.out.println(getp.getPhalin());
System.out.println(getp.getPsangse());
System.out.println("--- 상품관리 내역 End ---");
}
public static void oPrint (Order geto) {
System.out.println("--- 주문관리 내역 ---");
System.out.println(geto.getOcode());
System.out.println(geto.getPcode());
System.out.println(geto.getUid());
System.out.println(geto.getOcount());
System.out.println(geto.getOprice());
System.out.println(geto.getOtotal());
System.out.println(geto.getOaddress());
System.out.println("--- 주문관리 내역 End ---");
}
}
천방지축 얼렁뚱땅 빙글빙글 돌아가는 흐름 ..
응용 - uPrint, pPrint, oPrint를 다른 TatlaPrint class로 분리하여보기
package kr.or.ksmart.A;
public class TotalPrint {
public void uPrint (User getu){
System.out.println("--- 회원가입 내역 ---");
System.out.println(getu.getUid() + "<- 아이디");
System.out.println(getu.getUpw() + "<- 비밀번호");
System.out.println(getu.getUphone() + "<- 전화번호");
System.out.println(getu.getUgender() + "<- 성별");
System.out.println(getu.getUage() + "<- 나이");
System.out.println(getu.getUlevel() + "<- 권한");
System.out.println("--- 회원가입 내역 End ---");
}
public void gPrint (Goods getp) {
System.out.println("--- 상품관리 내역 ---");
System.out.println(getp.getPcode());
System.out.println(getp.getUid());
System.out.println(getp.getPname());
System.out.println(getp.getPjungsang());
System.out.println(getp.getPhalin());
System.out.println(getp.getPsangse());
System.out.println("--- 상품관리 내역 End ---");
}
public void oPrint (Order geto) {
System.out.println("--- 주문관리 내역 ---");
System.out.println(geto.getOcode());
System.out.println(geto.getPcode());
System.out.println(geto.getUid());
System.out.println(geto.getOcount());
System.out.println(geto.getOprice());
System.out.println(geto.getOtotal());
System.out.println(geto.getOaddress());
System.out.println("--- 주문관리 내역 End ---");
}
}
package kr.or.ksmart.A;
public class AA02 {
public static void main(String[] args) {
TotalPrint prnt = new TotalPrint();
User u01 = new User();
u01.setUid("id001");
u01.setUpw("pw001");
u01.setUphone("010-001");
u01.setUgender('남');
u01.setUage(20);
u01.setUlevel("구매자");
prnt.uPrint(u01);
User u02 = new User();
u02.setUid("id002");
u02.setUpw ("pw002");
u02.setUphone ("010-002");
u02.setUgender ('여');
u02.setUage (30);
u02.setUlevel ("판매자");
prnt.uPrint(u02);
Goods g01 = new Goods();
System.out.println(g01);
g01.setPcode ("p001");
g01.setUid (u02.getUid());
g01.setPname ("노트북");
g01.setPjungsang (2000000);
g01.setPhalin (1000000);
g01.setPsangse ("SW개발용");
prnt.gPrint(g01);
Order o01 =new Order();
System.out.println(o01);
o01.setOcode ("o001");
o01.setPcode (g01.getPcode());
o01.setUid (u02.getUid());
o01.setOcount (3);
o01.setOprice (g01.getPjungsang());
o01.setOtotal (o01.getOcount() * o01.getOprice());
o01.setOaddress ("금암동");
prnt.oPrint(o01);
User u03 = new User();
u03.setUid ("id003");
u03.setUpw ("pw003");
u03.setUphone ("010-003");
u03.setUgender ('여');
u03.setUage (31);
u03.setUlevel ("판매자");
prnt.uPrint(u03);
Goods g02 = new Goods();
g02.setPcode ("p002");
g02.setUid (u03.getUid());
g02.setPname ("선풍기");
g02.setPjungsang (50000);
g02.setPhalin (40000);
g02.setPsangse ("시원해");
prnt.gPrint(g02);
Order o02 =new Order();
o02.setOcode("o002");
o02.setPcode (g02.getPcode());
o02.setUid (u03.getUid());
o02.setOcount(5);
o02.setOprice(g02.getPjungsang());
o02.setOtotal(o02.getOcount() * o02.getOprice());
o02.setOaddress ("서신동");
prnt.oPrint(o02);
User u04 = new User();
u04.setUid ("id004");
u04.setUpw ("pw004");
u04.setUphone ("010-004");
u04.setUgender ('여');
u04.setUage (32);
u04.setUlevel ("관리자");
prnt.uPrint(u04);
Goods g03 = new Goods();
g03.setPcode ("p003");
g03.setUid (u04.getUid());
g03.setPname ("사과박스");
g03.setPjungsang (100000);
g03.setPhalin (80000);
g03.setPsangse ("SW개발용");
prnt.gPrint(g03);
Order o03 =new Order();
o03.setOcode ("o003");
o03.setPcode(g03.getPcode());
o03.setUid(u04.getUid());
o03.setOcount(2);
o03.setOprice (g03.getPjungsang());
o03.setOtotal (o03.getOcount() * o03.getOprice());
o03.setOaddress("덕진동");
prnt.oPrint(o03);
}
}
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