01_07 TypeCasting

public class _07_TypeCasting {
    public static void main(String[] args) {
        //TypeCasting
        //정수형에서 실수형으로
        //실수형에서 정수형으로

        //int to float, double
        int score = 93;
        System.out.println(score); //93
        System.out.println((float) score); //93.0
        System.out.println((double)score); //93.0

        //float, double to int
        float score_f = 93.3F;
        double score_d = 98.8;
        System.out.println((int)score_f); //93
        System.out.println((int)score_d); //98

        //정수+ 실수 연산
        score = 93 +(int)98.8; //93+98
        System.out.println(score); //191

        score_d=(double) 93 +98.8; //93.0+98.8
        System.out.println(score_d); //191.8

        //변수에 형변환된 데이터 집어넣기
        double convertedScoreDouble = score; //191->191.0
        //int -> long -> float -> double (자동 형변환)

        int convertedScoreInt = (int)score_d; //191.8 ->191
        // double -> float -> long -> int (수동 형변환)

        //숫자를 문자열로
        String s1 = String.valueOf(93);
        s1= Integer.toString(93);
        System.out.println(s1); //93

        String s2 = String.valueOf(98.8);
        s2 = Double.toString(98.8);
        System.out.println(s2);//93.8

        //문자열을 숫자로
        int i  = Integer.parseInt("93");
        System.out.println(i); //93
        double d = Double.parseDouble("98.8");
        System.out.println(d); //98.8

        //에러
        //int error = Integer.parseInt("자바");



    }
}