2017.05.22 / 17:21
java enum À» È°¿ëÇÏÀÚ
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howto java :: learn the enum type
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | package com.test; /** * Learn the enum type * @author sangyeol.lee(korlsy@gmail.com) */ public class EnumExam { /** * old - bad code */ public static final int FONT_STYLE_NORMAL = 0 ; public static final int FONT_STYLE_BOLD = 1 ; public static final int FONT_STYLE_ITALIC = 2 ; /** * new - good code * »ó¼ö¸¦ enum typeÀ¸·Î ´ëü * @author Administrator * */ public static enum FONT_STYLE{ NORMAL{ @Override public String fontStyleName() { return this .toString(); } } , BOLD{ @Override public String fontStyleName() { return this .toString(); } } , ITALIC{ @Override public String fontStyleName() { return this .toString(); } }; public abstract String fontStyleName(); } /** * @param args */ public static void main(String[] args) { /** * enum const */ //print all font style System.out.printf( "font style count => %d%n" , FONT_STYLE.values().length); //font style count => 3 for (FONT_STYLE style:FONT_STYLE.values()){ //style => NORMAL //style => BOLD //style => ITALIC System.out.printf( "style => %s%n" , style.fontStyleName()); } //good code(jdk5.0 more...) setFontStyle(FONT_STYLE.BOLD); FONT_STYLE fontStyle = getFontStyle(); switch (fontStyle){ case BOLD : /*...*/ break; case ITALIC : /*...*/ break; case NORMAL : /*...*/ break; default : /*...*/ } //bad code(jdk1.4.....) setFontStyle(FONT_STYLE_BOLD); } private static void setFontStyle( int fontStyleBold) { //.... } private static FONT_STYLE getFontStyle() { return FONT_STYLE.ITALIC; } private static void setFontStyle(FONT_STYLE bold) { //..... } } |
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