1) String -> int 변환

String str ="12345";
int n = Integer.parseInt(str);
		
System.out.println(str.getClass());	
//class java.lang.String 출력
		
System.out.println(str.getClass().getName());
//java.lang.String 출력

2) int -> String 변환

int n = 12345;
String str = Integer.toString(n);

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