Java ASCII to String asciiToLowerCase(String s)

Description

ascii To Lower Case

License

Apache License

Declaration

public static String asciiToLowerCase(String s) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    private static final char[] lowercases = { '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
            '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017', '\020', '\021', '\022', '\023', '\024',
            '\025', '\026', '\027', '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037', '\040', '\041',
            '\042', '\043', '\044', '\045', '\046', '\047', '\050', '\051', '\052', '\053', '\054', '\055', '\056',
            '\057', '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067', '\070', '\071', '\072', '\073',
            '\074', '\075', '\076', '\077', '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147', '\150',
            '\151', '\152', '\153', '\154', '\155', '\156', '\157', '\160', '\161', '\162', '\163', '\164', '\165',
            '\166', '\167', '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137', '\140', '\141', '\142',
            '\143', '\144', '\145', '\146', '\147', '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
            '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167', '\170', '\171', '\172', '\173', '\174',
            '\175', '\176', '\177' };

    public static String asciiToLowerCase(String s) {
        char[] c = s.toCharArray();
        int i = s.length();

        // look for first conversion
        while (i-- > 0) {
            char c1 = c[i];
            if (c1 <= 127) {
                char c2 = lowercases[c1];
                if (c1 != c2) {
                    c[i] = c2;/*  w w w.  java  2  s .co  m*/
                    break;
                }
            }
        }

        if (i == 0) {
            return s;
        }

        while (i-- > 0) {
            if (c[i] <= 127) {
                c[i] = lowercases[c[i]];
            }
        }

        return new String(c);
    }
}

Related

1. ascii2String(String ASCIIs)
2. asciiBytesToChar(byte[] bytes)
3. asciiBytesToString(byte[] val)
4. ASCIIToChar(final int ascii)
5. AsciiToChar(int asc)
6. asciiToString(byte ascii)
7. asciiToString(byte[] b, int off, int len)
8. asciiToString(int asciiCode)
9. asciiTrimR(String str, int length)