字符计数
题目:输入一行字符,分别统计出其中英文字母、空格、数字和其它字符的个数。
public static void countNum(String m) { int english = 0; int blank = 0; int number = 0; int other = 0; int chinese = 0; String Echinese="[\u4e00-\u9fa5]"; //中文范围 char[] charr= m.toCharArray(); String[] strArr = new String[charr.length]; for (int i = 0; i < charr.length; i++) { strArr[i] = String.valueOf(charr[i]); //将char数组转换成string数组 System.out.print("字符: "+m.charAt(i)); System.out.println(";字对应的值: "+Integer.valueOf(m.charAt(i))); } for (int i = 0; i < strArr.length; i++) { if (strArr[i].matches(Echinese)) { chinese++; }else if (Character.isLetter(strArr[i].charAt(0))) { //strArr[i].charAt(0)>=65&&strArr[i].charAt(0)<=90||strArr[i].charAt(0)>=97&&strArr[i].charAt(0)<=122 english++; }else if (Character.isDigit(strArr[i].charAt(0))) { //charr[i]>=48&&charr[i]<=57或者写成charr[i]>='0'&&charr[i]<='9' number++; }else if (charr[i]==32) { //Character.isSpaceChar(strArr[i].charAt(0)) blank++; }else { other++; } } System.out.println("中文数量:"+chinese); System.out.println("英文数量:"+english); System.out.println("空格数量:"+blank); System.out.println("数字数量:"+number); System.out.println("其他字符数量:"+other); }
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