Java String ASCII转换为String

package com.beginnersbook.string;

public class ASCIIToString {
    public static void main(String args[]){
        int num[] = {65, 120, 98, 75, 115};
        String str =null;
        for(int i: num){
            str = Character.toString((char)i);
            System.out.println(str);
        }
    }
}

A
x
b
K
s