checkdigits.java

JAVA实现的酒店管理系统

package tools;

/*功能描述：判断一个字符串是否全部由数字组成
 * @Author:黄顺武
 * @Time:2008-2-22
 */

public class CheckDigits {

	private static String result = "";// 判断的结果

	public CheckDigits() {

	}

	public static String doCheck(String stringTransffered) {
		int charNum = stringTransffered.length();
		for (int charStart = 0; charStart < charNum; charStart++) {
			if (!Character.isDigit(stringTransffered.charAt(charStart))) {
				result = null;
			}
		}
		if (result != null) {
			result = stringTransffered;
		}
		return result;
	}
}