java语言编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.showMenuFun(); } } } 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); } catch (Exception e) { jinggao("二"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("二"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("二"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("八"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("八"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("八"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("十"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("十"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("十"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("十六"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("十六"); } System.out.println("转换结果为：" + m); } 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); } catch (Exception e) { jinggao("十六"); } System.out.println("转换结果为：" + m); } } class Menu { private boolean flag = true; Jisuanqi J = new Jisuanqi(); public void showTitle(String l, String m, String n) { System.out.println(" " + l + ".将" + m + "进制数转换为" + n + "进制数 "); } public void showMenuInfo() { System.out.println(); System.out.println(" ★欢迎使用★ "); System.out.println(); System.out.println("==============小计算器=============="); showTitle("(1)", "二", "八"); showTitle("(2)", "二", "十"); showTitle("(3)", "二", "十六"); showTitle("(4)", "八", "二"); showTitle("(5)", "八", "十"); showTitle("(6)", "八", "十六"); showTitle("(7)", "十", "二"); showTitle("(8)", "十", "八"); showTitle("(9)", "十", "十六"); showTitle("(10)", "十六", "二"); showTitle("(11)", "十六", "八"); showTitle("(12)", "十六", "十"); System.out.println(" (0).退出"); 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 showMenuFun() { 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_Two(); askUser(); break; case 5: J.Eight_Ten(); askUser(); break; case 6: J.Eight_Sixteen(); askUser(); break; case 7: J.Ten_Two(); askUser(); break; case 8: J.Ten_Eight(); askUser(); break; case 9: J.Ten_Sixteen(); askUser(); break; case 10: J.Sixteen_Two(); askUser(); break; case 11: J.Sixteen_Eight(); askUser(); break; case 12: J.Sixteen_Ten(); askUser(); break; case 0: System.exit(0); break; default: System.out.println("输入有误！请您重新选择。"); flag = false; break; } } } }