Java 진수 변환

10진수  →  n진수

public class Test {
    public static void main(String[] args) {
        int k = 15;
    
        System.out.println("10진수 → 2진수");
        System.out.println(Integer.toString(k,2));
        System.out.println(Integer.toBinaryString(k));
        System.out.println();


        System.out.println("10진수 → 3진수");
        System.out.println(Integer.toString(k,3));
        System.out.println();


        System.out.println("10진수 → 4진수");
        System.out.println(Integer.toString(k,4));
        System.out.println();


        System.out.println("10진수 → 5진수");
        System.out.println(Integer.toString(k,5));
        System.out.println();


        System.out.println("10진수 → 6진수");
        System.out.println(Integer.toString(k,6));
        System.out.println();


        System.out.println("10진수 → 7진수");
        System.out.println(Integer.toString(k,7));
        System.out.println();


        System.out.println("10진수 → 8진수");
        System.out.println(Integer.toString(k,8));
        System.out.println(Integer.toOctalString(k));
        System.out.println();


        System.out.println("10진수 → 16진수");
        System.out.println(Integer.toString(k,16));
        System.out.println(Integer.toHexString(k));
        System.out.println();
    }
}

 

n진수 변환 코드 결과값

 

 

n진수  →  10진수

public class Solution {
    public static void main(String[] args) {
        String k = "1111";

        System.out.println("2진수 → 10진수");
        System.out.println(Integer.parseInt(k, 2));
        System.out.println();


        System.out.println("3진수 → 10진수");
        System.out.println(Integer.parseInt(k, 3));
        System.out.println();


        System.out.println("4진수 → 10진수");
        System.out.println(Integer.parseInt(k, 4));
        System.out.println();


        System.out.println("5진수 → 10진수");
        System.out.println(Integer.parseInt(k, 5));
        System.out.println();


        System.out.println("6진수 → 10진수");
        System.out.println(Integer.parseInt(k, 6));
        System.out.println();


        System.out.println("7진수 → 10진수");
        System.out.println(Integer.parseInt(k, 7));
        System.out.println();


        System.out.println("8진수 → 10진수");
        System.out.println(Integer.parseInt(k, 8));
        System.out.println();


        System.out.println("16진수 → 10진수");
        System.out.println(Integer.parseInt(k, 16));
        System.out.println();
    }
}

 

10진수 변환 코드 결과값

 

 

10진수에서 n진수로 변환할 때는 Integer.toString(변환하려는 수, n진수)

n진수에서 10진수로 변환할 때는 Integer.parseInt(변환하려는 수, n진수)