调用java中的进制转换

public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		
		int a=sc.nextInt();
		//转16进制
		System.out.println(Integer.toHexString(a));
		//转8进制
		System.out.println(Integer.toOctalString(a));
		//转2进制
		System.out.println(Integer.toBinaryString(a));
		
		
		
		System.out.println(Integer.valueOf("FFFF", 16).toString());
		
		
		System.out.println(Integer.valueOf("17",8).toString());
		
		
		System.out.println(Integer.valueOf("0101",2).toString());
	}

十进制转其他进制

import java.util.Scanner;

public class Test {
    
    private static char[] array = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
    public static String myDec(int number, int n) {
        StringBuilder result = new StringBuilder();
        while (number > 0) {
            result.insert(0, array[number % n]);
            number /= n;
        }
        return result.toString();
    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a=sc.nextInt();
        int b=sc.nextInt();
        System.out.println(myDec(a, b));;
    }
}

十进制转十六进制，按除16取余倒数

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        String s="";
        char c=' ';
        if(n==0) {s="0";}
        int m;
        while(n!=0) {
        	//取到余数
            m=n%16;
            //如果在10以上就转成字母
            if(m/10==1) {
            	c=(char)(65+(m%10));
            	//如果在10以下就转成数字
            }else if(m/10==0) {
            	c=(char)(48+m);
            }
            s=c+s;
            n=n/16;            
        }
        System.out.println(s);
    }

}

十六进制转八进制

import java.util.Scanner;
 
public class Main {
 
	public static void main(String[] args) {
		
		int n;
		Scanner scanner = new Scanner(System.in);
		n=scanner.nextInt();
		
		String[] a= new String[n];
		
		for(int i=0;i