Java实现复杂的进制转换器功能示例

本文实例讲述了Java实现复杂的进制转换器功能。分享给大家供大家参考,具体如下:

这是用java写的进制转换器,包括10、2、8、16进制之间共12种的相互转换。输入一个要转换的数之后,按提示选择所采用的转换方式,输出转换的结果。

注:新上传的文件是在此前代码(下面的3. 原java代码)的基础上做了改进,能更好地实现封装。

1. SystemConvert.java

package day8;

import java.util.Scanner;

public class SystemConvert {

static Scanner scanner = new Scanner(System.in);

static String s = "";

// 定义10进制转2进制的方法。

public static String C10T2(int numb) {

String result = "";

for (int i = numb; i > 0; i /= 2)

result = i % 2 + result;

return result;

}

// 定义10进制转8进制的方法。

public static String C10T8(int numb) {

String result = "";

for (int i = numb; i > 0; i /= 8)

result = i % 8 + result;

return result;

}

// 定义2进制转10进制的方法。

public static int C2T10(int numb) {

int k = 0, result = 0;

// String result=null;

for (int i = numb; i > 0; i /= 10) {

result += (i % 10) * Math.pow(2, k);

k++;

}

return result;

}

// 定义8进制转10进制的方法。

public static int C8T10(int numb) {

int k = 0, temp = 0;

for (int i = numb; i > 0; i /= 10) {

temp += (i % 10) * Math.pow(8, k);

k++;

}

return temp;

}

public static void convert10(int numb, int to) {

String s = "";

switch (to) {

case 2:

s = "" + C10T2(numb);

break;

case 8:

s = "" + C10T8(numb);

break;

case 16:

s = Integer.toHexString(numb).toUpperCase();

break;

default:

System.out.println("wrong input!");

}

System.out.println(s);

}

public static void convert2(int numb, int to) {

String s = "";

switch (to) {

case 10:

s = "" + C2T10(numb);

break;

case 8:

s = "" + C10T8(C2T10(numb));

break;

case 16:

s = Integer.toHexString(C2T10(numb)).toUpperCase();

break;

default:

System.out.println("wrong input!");

}

System.out.println(s);

}

public static void convert8(int numb, int to) {

String s = "";

switch (to) {

case 2:

s = "" + C10T2(C8T10(numb));

break;

case 10:

s = "" + C8T10(numb);

break;

case 16:

s = Integer.toHexString(C8T10(numb)).toUpperCase();

break;

default:

System.out.println("wrong input!");

}

System.out.println(s);

}

public static void convert16(String numb, int to) {

String s = "";

switch (to) {

case 2:

int temp2 = Integer.parseInt(numb, 16);

s = C10T2(temp2);

break;

case 8:

int temp3 = Integer.parseInt(numb, 16);

s = C10T8(temp3);

break;

case 10:

int temp = Integer.parseInt(numb, 16);

s = "" + temp;

break;

default:

System.out.println("wrong input!");

}

System.out.println(s);

}

public static void convert(int numb, int from, int to) {

switch (from) {

case 10:

convert10(numb, to);

break;

case 2:

convert2(numb, to);

break;

case 8:

convert8(numb, to);

break;

default:

System.out.println("wrong input!");

}

}

public static void convert(String numb, int from, int to) {

switch (from) {

case 16:

convert16(numb, to);

break;

default:

System.out.println("wrong input!");

}

}

public static void main(String[] args) {

System.out.println("要转的是16进制数吗?\n输入1。代表是;\n输入2.代表不是.\n");

int input = scanner.nextInt();

switch (input) {

case 1:

System.out.println("请输入一个16进制数:");

String numb = scanner.next();

System.out.println("转成什么进制的数?");

int to = scanner.nextInt();

convert(numb, 16, to);

break;

case 2:

System.out.println("请输入一个数:");

int numb2 = scanner.nextInt();

System.out.println("从什么进制数转起?");

int from = scanner.nextInt();

System.out.println("转成什么进制的数?");

int to2 = scanner.nextInt();

convert(numb2, from, to2);

break;

default:

System.out.println("wrong input!");

}

}

}

2. 运行效果截图:

3. 原java代码

import java.util.Scanner;

public class SystemConvert {

static Scanner scanner = new Scanner(System.in);

static String s = "";

public static void convert() {

System.out.println("please input a number:");

String numb = scanner.next();

System.out.println("choose a way:\n输入1,表示10进制转2进制;\n"

+ "输入2,表示2进制转10进制;\n" + "输入3,表示10进制转8进制;\n"

+ "输入4,表示8进制转10进制;\n" + "输入5,表示10进制转16进制;\n"

+ "输入6,表示16进制转10进制;\n" + "输入7,表示2进制转8进制;\n"

+ "输入8,表示2进制转16进制;\n" + "输入9,表示8进制转2进制;\n"

+ "输入10,表示8进制转16进制;\n" + "输入11,表示16进制转2进制;\n"

+ "输入12,表示16进制转8进制;\n");

int input = scanner.nextInt();

switch (input) {

case 1: // 10>>>2

s = "" + C10T2(numb);

break;

case 2: // 2>>>10

s += C2T10(numb);

break;

case 3: // 10>>>8

s = "" + C10T8(numb);

break;

case 4: // 8>>>10

s = "" + C8T10(numb);

break;

case 5: // 10>>>16

s = Integer.toHexString(Integer.valueOf(numb)).toUpperCase();

break;

case 6:// 16>>>10

int temp = Integer.parseInt(numb, 16);

s = "" + temp;

break;

case 7: // 2>>>8

s = "" + C10T8(Integer.toString(C2T10(numb)));

break;

case 8: // 2>>>16

s = Integer.toHexString(Integer.valueOf(C2T10(numb))).toUpperCase();

break;

case 9: // 8>>>2

s = "" + C10T2(Integer.toString(C8T10(numb)));

break;

case 10:// 8>>>16

s = Integer.toHexString(Integer.valueOf(C8T10(numb))).toUpperCase();

break;

case 11:// 16>>>2

int temp2 = Integer.parseInt(numb, 16);

s = Integer.toBinaryString(temp2);

break;

case 12:// 16>>>8

int temp3 = Integer.parseInt(numb, 16);

s = C10T8(Integer.toString(temp3));

break;

default:

System.out.println("Wrong input!");

}

System.out.println(s);

}

public static int C2T10(String numb) {

int k = 0, result = 0;

// String result=null;

for (int i = Integer.valueOf(numb); i > 0; i /= 10) {

result += (i % 10) * Math.pow(2, k);

k++;

}

return result;

}

public static int C8T10(String numb) {

int k = 0, temp = 0;

for (int i = Integer.valueOf(numb); i > 0; i /= 10) {

temp += (i % 10) * Math.pow(8, k);

k++;

}

return temp;

}

public static String C10T8(String numb) {

String result = "";

for (int i = Integer.valueOf(numb); i > 0; i /= 8)

result = i % 8 + result;

return result;

}

public static String C10T2(String numb) {

String result = "";

for (int i = Integer.valueOf(numb); i > 0; i /= 2)

result = i % 2 + result;

return result;

}

public static void main(String[] args) {

SystemConvert.convert();

}

}

4. 运行截图:

PS:这里再为大家推荐几款本站的在线进制转换与计算工具,相信对于大家能有所帮助:

在线任意进制转换工具:

http://tools./transcoding/hexconvert

在线标准计算器:

http://tools./jisuanqi/jsq

在线科学计算器:

http://tools./jisuanqi/jsqkexue

希望本文所述对大家java程序设计有所帮助。

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