休職から職務復帰に失敗した人

int n = 3;
switch (n) {
case 1:
System.out.println("n is one.");
break;
case 2:
System.out.println("n is two.");
break;
case 3:
System.out.println("n is tree.");
break;
default:
System.out.println("unknwon");
break;
}