String형으로 형변환 하는 방법

castingToString.java

public class castingToString {
  public static void main(String[] args){
    int a = 66;
    double b = 3.456;
    String c = "90";
    char d = 'd';
    
    System.out.println("Integer to String : " + String.valueOf(a));
    System.out.println("Integer to String : " + Integer.toString(a));
    // Integer to String : 66
                       
    System.out.println("Double to String : " + String.valueOf(b));
    // Double to String : 3.456
    
    System.out.println("DataType Check : "+String.valueOf(b).equals("3.456"));
    // DataType Check : true
                       
    System.out.println("Char to String : " + String.valueOf(a));
    // Char to String : d
    
    System.out.println("DataType Check : "+String.valueOf(d).equals("d"));
    // DataType Check : true
    
    System.out.println("DataType Check : "+String.valueOf(d).equals('d'));
    // DataType Check : false
  }
}