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best java chinese word seg !
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package org.ansj.util;

public class WordAlert {
	public static void main(String[] args) {
		System.out.println((int) '１');
		// System.out.println((int)'ｂ') ;
		// System.out.println((int)'') ;
		System.out.println((int) '９');
		System.out.println((int) '０');
		// System.out.println("-----------------------------") ;
		System.out.println((int) '0');
		// System.out.println((int)'Ｂ') ;
		// System.out.println((int)'Ｃ') ;
		// System.out.println((int)'Ｄ') ;
		// System.out.println((int)'Ｚ') ;
		// System.out.println((int)'Z');
		String str = "１２３４５６４９８７大法师说的12323123";
		// long start = System.currentTimeMillis() ;
		// for (int i = 0; i < 10000000; i++) {
		// // alertEnglish(str.toCharArray(),0,str.length());
		// str.toLowerCase();
		// }
		// System.out.println(System.currentTimeMillis()-start);
		System.out.println(alertNumber(str.toCharArray(), 0, str.length()));
		;
	}

	/**
	 * 这个就是(int)'ａ'
	 */
	public static final int MIN_LOWER = 65345;
	/**
	 * 这个就是(int)'ｚ'
	 */
	public static final int MAX_LOWER = 65370;
	/**
	 * 差距进行转译需要的
	 */
	public static final int LOWER_GAP = 65248;
	/**
	 * 这个就是(int)'Ａ'
	 */
	public static final int MIN_UPPER = 65313;
	/**
	 * 这个就是(int)'Ｚ'
	 */
	public static final int MAX_UPPER = 65338;
	/**
	 * 差距进行转译需要的
	 */
	public static final int UPPER_GAP = 65216;
	/**
	 * 这个就是(int)'A'
	 */
	public static final int MIN_UPPER_E = 65;
	/**
	 * 这个就是(int)'Z'
	 */
	public static final int MAX_UPPER_E = 90;
	/**
	 * 差距进行转译需要的
	 */
	public static final int UPPER_GAP_E = -32;
	/**
	 * 这个就是(int)'0'
	 */
	public static final int MIN_UPPER_N = 65296;
	/**
	 * 这个就是(int)'９'
	 */
	public static final int MAX_UPPER_N = 65305;
	/**
	 * 差距进行转译需要的
	 */
	public static final int UPPER_GAP_N = 65248;

	/**
	 * 对全角的字符串,大写字母进行转译.如ｓｄｆｓｄｆ
	 * 
	 * @param chars
	 * @param start
	 * @param end
	 * @return
	 */
	public static String alertEnglish(char[] chars, int start, int end) {
		for (int i = start; i < start + end; i++) {
			if (chars[i] >= MIN_LOWER && chars[i] <= MAX_LOWER) {
				chars[i] = (char) (chars[i] - LOWER_GAP);
			}
			if (chars[i] >= MIN_UPPER && chars[i] <= MAX_UPPER) {
				chars[i] = (char) (chars[i] - UPPER_GAP);
			}
			if (chars[i] >= MIN_UPPER_E && chars[i] <= MAX_UPPER_E) {
				chars[i] = (char) (chars[i] - UPPER_GAP_E);
			}
		}
		return new String(chars, start, end);
	}

	public static String alertEnglish(String temp, int start, int end) {
		char c = 0;
		StringBuilder sb = new StringBuilder();
		for (int i = start; i < start + end; i++) {
			c = temp.charAt(i);
			if (c >= MIN_LOWER && c <= MAX_LOWER) {
				sb.append((char) (c - LOWER_GAP));
			} else if (c >= MIN_UPPER && c <= MAX_UPPER) {
				sb.append((char) (c - UPPER_GAP));
			} else if (c >= MIN_UPPER_E && c <= MAX_UPPER_E) {
				sb.append((char) (c - UPPER_GAP_E));
			} else {
				sb.append(c);
			}
		}
		return sb.toString();
	}

	public static String alertNumber(char[] chars, int start, int end) {
		for (int i = start; i < start + end; i++) {
			if (chars[i] >= MIN_UPPER_N && chars[i] <= MAX_UPPER_N) {
				chars[i] = (char) (chars[i] - UPPER_GAP_N);
			}
		}
		return new String(chars, start, end);
	}

	public static String alertNumber(String temp, int start, int end) {
		char c = 0;
		StringBuilder sb = new StringBuilder();
		for (int i = start; i < start + end; i++) {
			c = temp.charAt(i);
			if (c >= MIN_UPPER_N && c <= MAX_UPPER_N) {
				sb.append((char) (c - UPPER_GAP_N));
			} else {
				sb.append(c);
			}
		}
		return sb.toString();
	}
}