因此，这是我到目前为止的内容，但它向后打印出十六进制。我如何将其切换为正向，或者有比我做的更简单的方法来将整数转换为HexDecimal。这是一项家庭作业，我不允许使用数组或预定义方法（IE .toHexString（））。
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scn = new Scanner(System.in);
int num = scn.nextInt();
int remainder;
while (num > 0) {
remainder = num % 16;
if (remainder == 10) {
System.out.print("a");
} else if (remainder == 11) {
System.out.print("b");
} else if (remainder == 12) {
System.out.print("c");
} else if (remainder == 13) {
System.out.print("d");
} else if (remainder == 14) {
System.out.print("e");
} else if (remainder == 15) {
System.out.print("f");
} else {
System.out.print(remainder);
}
num = num / 16;
}
}
}
如果要走非递归路线，String请在进入循环并建立循环之前声明a ，而不是打印System.out每次循环迭代：
String output = "";
while (num > 0) {
remainder = num % 16;
if (remainder == 10) {
output = "a" + output;
} else if (remainder == 11) {
output = "b" + output;
} else if (remainder == 12) {
output = "c" + output;
} else if (remainder == 13) {
output = "d" + output;
} else if (remainder == 14) {
output = "e" + output;
} else if (remainder == 15) {
output = "f" + output;
} else {
output = remainder + output;
}
num = num / 16;
}
System.out.println(output);
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