enum 활용(JAVA)

# enum sample source

enum을 사용하여 코드 재사용성, 가독성을 높인다.

source01) Main.java

package com.source.common._enum;
 
import com.source.common._enum.Constants.COMMAND_TYPE;
import com.source.common._enum.Constants.MESSAGE_TYPE;
 
public class Main {
 
    public static void main(String[] args) {
 
        System.out.println("STOP Code : " + COMMAND_TYPE.STOP.getTypeCode());
        System.out.println("REQ_ACK Code : " + MESSAGE_TYPE.REQ_ACK.getTypeCode());
 
    }
}
 

source02) Constants.java

package com.source.common._enum;
 
public class Constants {
    public enum COMMAND_TYPE {
        GO("01"), STOP("02"), READY("03");
 
        private String typeCode;
 
        private COMMAND_TYPE(String typeCode) {
            this.typeCode = typeCode;
        }
 
        public String getTypeCode() {
            return this.typeCode;
        }
 
        public COMMAND_TYPE getItem(String typeCode) {
            for (COMMAND_TYPE fc : COMMAND_TYPE.values()) {
                if (fc.typeCode.equals(typeCode)) {
                    return fc;
                }
            }
            return null;
        }
    }
 
    public enum MESSAGE_TYPE {
        REQ_ACK("0"), REQ_NON_ACK("1"), SUCCESS_RESPONSE("2"), BAD_RESPONSE("4");
 
        private String typeCode;
 
        private MESSAGE_TYPE(String typeCode) {
            this.typeCode = typeCode;
        }
 
        public String getTypeCode() {
            return this.typeCode;
        }
 
        public MESSAGE_TYPE getItem(String typeCode) {
            for (MESSAGE_TYPE fc : MESSAGE_TYPE.values()) {
                if (fc.typeCode.equals(typeCode)) {
                    return fc;
                }
            }
            return null;
        }
    }
 
    // You can define another enum ..
}
 

result)

STOP Code : 02
REQ_ACK Code : 0