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教えてエライ人2
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| interface Debugprintable { | |
| enum ErrStatus { | |
| NO_ERROR(0), FILE_ERROR(1), MEMORY_ERROR(2); | |
| private final int statusCode; | |
| private ErrStatus(int statusCode) { | |
| this.statusCode = statusCode; | |
| } | |
| @Override | |
| public String toString() { | |
| return Integer.toString(statusCode); | |
| } | |
| } | |
| String PREFIX = "ERROR:"; | |
| void debugprint(); | |
| } | |
| class Mynumber implements Debugprintable{ | |
| private int a; | |
| private ErrStatus y; | |
| public Mynumber(int a) { | |
| this.a = a; | |
| setCode(a); | |
| } | |
| private void setCode(int x){ | |
| switch (x) { | |
| case 100: | |
| y = ErrStatus.NO_ERROR; | |
| break; | |
| case 200: | |
| y = ErrStatus.FILE_ERROR; | |
| break; | |
| default: | |
| y = ErrStatus.MEMORY_ERROR; | |
| } | |
| } | |
| @Override | |
| public void debugprint() { | |
| System.out.println(PREFIX + y); | |
| } | |
| } | |
| //Debugprintable interface をメソッドの引数として使用する。 | |
| public class Mynumber2 { | |
| public void printDebug(Debugprintable debugprintable) { | |
| debugprintable.debugprint(); | |
| } | |
| public static void main(String[] args) { | |
| Mynumber a = new Mynumber(100); | |
| Mynumber b = new Mynumber(200); | |
| Mynumber c = new Mynumber(500); | |
| Mynumber2 x = new Mynumber2(); | |
| x.printDebug(a); | |
| x.printDebug(b); | |
| x.printDebug(c); | |
| } | |
| } |
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