认识达内从这里开始

昆明IT培训的小编这一期给大家分享十进制转二、八、十六进制的字符串二、八、十六进制的字符串。

十进制转二进制

1 class DecToBin

2 {

3    public static void main(String[] args)

4    {

5        //System.out.println("Hello World!");

6        long dec = -9223372036854775807l;

7                // -9223372036854775808这个数不行，不要试，嘿嘿

8        String binStr="";

9        long decAbs=Math.abs(dec);

10        while (decAbs>0)

11        {   binStr=(decAbs&1)+binStr;

12            decAbs>>=1;

13        }

14        binStr= dec<0?"-"+binStr:dec==0?"0":binStr;

15

16        System.out.println(binStr);

17    }

18 }

十进制转八进制

1 class DecToOct

2 {

3    public static void main(String[] args)

4    {

5        //System.out.println("Hello World!");

6        long dec=-0;//有-0吗？

7        String octStr="";

8        long decAbs=Math.abs(dec);

9        while (decAbs>0)

10        {   octStr=(decAbs&7)+octStr;//

11            decAbs>>=3;

12        }

13        octStr= dec<0?"-"+octStr:dec==0?"0":octStr;

14        System.out.println(octStr);

15    }

16 }

十进制转十六进制

1 class DecToHex

2 {

3    public static void main(String[] args)

4    {

5        System.out.println("Hello World!");

6        long dec=-1;//计算器的负数不会弄-。-

7        String hexStr="";

8

9        long decAbs=Math.abs(dec);

10        while(decAbs>0)

11        {   long lastFour=decAbs&15;

12            if (lastFour>9)

13            hexStr=(char)('A'+lastFour-10)+hexStr;

14            else hexStr=lastFour+hexStr;

15            decAbs>>=4;

16        }

17

18        hexStr= dec<0?"-"+hexStr:dec==0?"0":hexStr;

19        System.out.println(hexStr);

20    }

21 }

了解详情请登陆昆明达内IT培训官网（km.tedu.cn）！