[ Java ] 형 변환

1. int -> String

int num = 29;

String strNum = String.valueOf(num); 

2. String -> int

String str = "abc";

int numStr = Integer.parseInt(str);

3. String -> char

String str = "abc";

char c = str.charAt(0);  // 'a'

4. char -> String

char c = 'A';

String s = String.valueOf(c);
//또는
String s = Character.toString(c);
//또는
String s = new String(new char[]{c});

5. String -> char[ ]

String str = "abc";

char[] chars = str.toCharArray();  // ['a', 'b', 'c']

6. char[ ] -> String

char[] chars = {'H', 'e', 'l', 'l', 'o'};

String str = new String(chars);  // "Hello"
//또는
String str = String.valueOf(chars);