String str = "100"; System.out.println("str = " + str); System.out.println("str.getClass() = " + str.getClass()); // getClass -> 타입확인 int num = Integer.parseInt(str); // parsing - 분석 // int wrapper -> wrap -> primitive(원시형) -> 메소드 속성 X -> 도우미 System.out.println("num = " + num);
int num = 100; String str2 = String.valueOf(num); String str3 = new Integer(num4).toString(); System.out.println("String.valueOf(num) = " + str2); System.out.println("Integer(num4).toString() = " + str3);
double num8 = 100.5; int num9 = (int) num8; System.out.println("num9 = " + num9);