Integer형으로 형변환하는 방법

castingToInteger.java

public class castingToInteger {
  public static void main(String[] args){
    int a = 66;
    double b = 3.456;
    String c = "90";
    char d = 'd';
    
    System.out.println("Double to Integer : " + (int)b);
    // Double to Integer : 3
    
    System.out.println("Double to Integer : " + (int)Math.ceil(b));  // Math 클래스로 반올림(ceil)
    // Double to Integer : 4
    
    int temp1 = Integer.parseInt(c)+10;
    int temp2 = Integer.valueOf(c).intValue()+10;
    System.out.println("String to Integer : " + temp1+", "+temp2);
    // String to Integer : 100, 100
    
    System.out.println("String to Integer : "+(Integer.parseInt(c)+10));
    // String to Integer : 100
    
    System.out.println("Char to Integer : " + (int)d);
    // Char to Integer : 100
  }
}