用java写的数制转换计算器

import java.lang.Integer; import java.util.Scanner; public class Jsq { public static void main(String args[]) { while (true) { Menu a = new Menu(); a.showMenuInfo(); a.showMenuFunc(); } } } class Jisuanqi { private String s; public static void tishi1(String ch) { System.out.print("请输入一个" + ch + "进制数："); } public void jinggao(String ch) { System.err.println("输入有误！您必须输入一个" + ch + "进制数。"); } public void Two_Eight() { String m = null; System.out.println(); System.out.println("二进制——>八进制："); System.out.println(); tishi1("二"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 2), 8); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("二"); } } public void Two_Ten() { int m = 0; System.out.println(); System.out.println("二进制——>十进制："); System.out.println(); tishi1("二"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.parseInt(s, 2); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("二"); } } public void Two_Sixteen() { String m = null; System.out.println(); System.out.println("二进制——>十六进制："); System.out.println(); tishi1("二"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 2), 16); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("二"); } } public void Eight_Two() { String m = null; System.out.println(); System.out.println("八进制——>二进制："); System.out.println(); tishi1("八"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 8), 2); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("八"); } } public void Eight_Ten() { int m = 0; System.out.println(); System.out.println("八进制——>十进制："); System.out.println(); tishi1("八"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.parseInt(s, 8); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("八"); } } public void Eight_Sixteen() { String m = null; System.out.println(); System.out.println("八进制——>十六进制："); System.out.println(); tishi1("八"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 8), 16); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("八"); } } public void Ten_Two() { String m = null; System.out.println(); System.out.println("十进制——>二进制："); System.out.println(); tishi1("十"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 10), 2); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("十"); } } public void Ten_Eight() { String m = null; System.out.println(); System.out.println("十进制——>八进制："); System.out.println(); tishi1("十"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 10), 8); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("十"); } } public void Ten_Sixteen() { String m = null; System.out.println(); System.out.println("十进制——>十六进制："); System.out.println(); tishi1("十"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 10), 16); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("十"); } } public void Sixteen_Two() { String m = null; System.out.println(); System.out.println("十六进制——>二进制："); System.out.println(); tishi1("十六"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 16), 2); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("十六"); } } public void Sixteen_Eight() { String m = null; System.out.println(); System.out.println("十六进制——>八进制："); System.out.println(); tishi1("十六"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.toString(Integer.parseInt(s, 16), 8); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("十六"); } } public void Sixteen_Ten() { int m = 0; System.out.println(); System.out.println("十六进制——>十进制："); System.out.println(); tishi1("十六"); try { Scanner sc = new Scanner(System.in); s = sc.nextLine(); m = Integer.parseInt(s, 16); System.out.println("转换结果为：" + m); } catch (Exception e) { jinggao("十六"); } } } class Menu { private boolean flag = true; Jisuanqi J = new Jisuanqi(); public void showMenuInfo() { System.out.println(); System.out.println(" ★欢迎进入★"); System.out.println(); System.out.println(" ***************************************************"); System.out.println(" * *********************************************** *"); System.out.println(" * * * *"); System.out.println(" * * 数制转换计算器 * *"); System.out.println(" * * * *"); System.out.println(" * * ● 1:二进制数转化为八进制 * *"); System.out.println(" * * ● 2:二进制数转化为十进制 * *"); System.out.println(" * * ● 3:二进制数转化为十六进制 * *"); System.out.println(" * * ● 4:八进制数转化为二进制 * *"); System.out.println(" * * ● 5:八进制数转化为十进制 * *"); System.out.println(" * * ● 6:八进制数转化为十六进制 * *"); System.out.println(" * * ● 7:十进制数转化为二进制 * *"); System.out.println(" * * ● 8:十进制数转化为八进制 * *"); System.out.println(" * * ● 9:十进制数转化为十六进制 * *"); System.out.println(" * * ●10:十六进制数转化为二进制 * *"); System.out.println(" * * ●11:十六进制数转化为八进制 * *"); System.out.println(" * * ●12:十六进制数转化为十进制 * *"); System.out.println(" * * ● 0:退出 * *"); System.out.println(" * * * *"); System.out.println(" * *********************************************** *"); System.out.println(" ***************************************************"); } public void askUser() { char c; System.out.print("\n是否继续？（Y/N）："); Scanner sc = new Scanner(System.in); c = sc.nextLine().charAt(0); if (c == 'y' || c == 'Y') { flag = true; } else if (c == 'n' || c == 'N') { flag = false; } else { System.out.println("非法输入！"); flag = false; } } public void showMenuFunc() { int n = 0; System.out.print(" 请选择（0——12）："); try { Scanner sc = new Scanner(System.in); n = sc.nextInt(); } catch (Exception e) { System.err.println("输入有误！请您重新选择。"); flag = false; } while (flag) { switch (n) { case 1: J.Two_Eight(); askUser(); break; case 2: J.Two_Ten(); askUser(); break; case 3: J.Two_Sixteen(); askUser(); break; case 4: J.Eight_Tw