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import java.io.*;
public class Test {
    public static String convert(String s) {
        if (s == null || s.length() == 0)
            return s;
        byte abyte0[] = s.getBytes();
        char ac[] = new char[s.length()];
        int i = 0;
        for (int k = abyte0.length; i < k; i++) {
            int j = abyte0[i];
            if (j >= 48 && j <= 57)
                j = ((j - 48) + 5) % 10 + 48;
            else if (j >= 65 && j <= 90)
                j = ((j - 65) + 13) % 26 + 65;
            else if (j >= 97 && j <= 122)
                j = ((j - 97) + 13) % 26 + 97;
            ac[i] = (char) j;
        }
        return String.valueOf(ac);
    }
    private static int hash(String s) {
        int i = 0;
        char ac[] = s.toCharArray();
        int j = 0;
        for (int k = ac.length; j < k; j++)
            i = 31 * i + ac[j];
    &n


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http://java.sun.com/javase/downloads/index.jsp
IBM JDK
http://www.ibm.com/developerworks/java/
http://www.ibm.com/developerworks/cn/java/
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Eclipse
http://www.eclipse.org/
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public class TestEnum {
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