[자바] String 문자열을 StringBuilder로 옮겨담기

public class Test {
 
    public static void main(String[] args) {
        String str = "Hello Java!!";
        System.out.println("str: " + str);
        
        StringBuilder sb = new StringBuilder();
        
        for (int j = 0; j < str.length(); j++) {
            sb.append(str.charAt(j));
        }
        
        System.out.println("sb: " + sb);
    }
}

<출력결과>

 

str: Hello Java!!

sb: Hello Java!!