Java 入門指南 V2.00 - 單元 16 範例

Encrypt04.java

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public class Encrypt04 {    // 密碼表字元陣列    private char[] code = new char[26];      // 建構子        public Encrypt04() {       setCode();    }      // setter    public void setCode() {       int a = 0;       int b = 0;         a = (int) (Math.random() * 10);       System.out.printf("%d, ", a);       b = (int) (Math.random() * 10);       System.out.printf("%d, ", b);         int x, y, m, i;       char c = 'a';       for (i = 0; i < 26; i++) {          x = c;          y = x * a + b;          m = y % 26;          code[i] = (char) (m + 97);          c++;       }    }      // getter    public char[] getCode() {       return code;    }      // 編碼的方法    public String toEncode(String s) {       return s;    }      // 解碼的方法    public String toDecode(String s) {       return s;          }      // 測試的 main()    public static void main(String[] args) {       for (int i = 0; i < 16; i++) {          Encrypt04 e = new Encrypt04();          System.out.println(e.getCode());       }       //String s = "There is no spoon";       //System.out.println(s);       //String s1 = e.toEncode(s);       //System.out.println(s1);       //String s2 = e.toDecode(s1);       //System.out.println(s2);    } }    /* 檔名： Encrypt04.java    作者： Kaiching Chang    時間： September, 2014  */

Encrypt05.java

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public class Encrypt05 {    // 密碼表字元陣列    private char[] code = new char[26];      // 建構子        public Encrypt05() {       setCode();    }      // setter    public void setCode() {       int a = 0;       int b = 0;         while (a % 2 == 0) {          a = (int) (Math.random() * 10);          b = (int) (Math.random() * 10);       }       System.out.printf("%d, ", a);       System.out.printf("%d, ", b);         int x, y, m, i;       char c = 'a';       for (i = 0; i < 26; i++) {          x = c;          y = x * a + b;          m = y % 26;          code[i] = (char) (m + 97);          c++;       }    }      // getter    public char[] getCode() {       return code;    }      // 編碼的方法    public String toEncode(String s) {       return s;    }      // 解碼的方法    public String toDecode(String s) {       return s;          }      // 測試的 main()    public static void main(String[] args) {       for (int i = 0; i < 16; i++) {          Encrypt05 e = new Encrypt05();          System.out.println(e.getCode());       }       //String s = "There is no spoon";       //System.out.println(s);       //String s1 = e.toEncode(s);       //System.out.println(s1);       //String s2 = e.toDecode(s1);       //System.out.println(s2);    } }    /* 檔名： Encrypt05.java    作者： Kaiching Chang    時間： September, 2014  */

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