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這篇文章主要介紹了JAVA如何統(tǒng)計(jì)字符串中中文,英文,數(shù)字,空格,特殊字符的個(gè)數(shù),具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
引言
可以根據(jù)各種字符在Unicode字符編碼表中的區(qū)間來(lái)進(jìn)行判斷,如數(shù)字為'0'~'9'之間,英文字母為'a'~'z'或'A'~'Z'等,Java判斷一個(gè)字符串是否有中文是利用Unicode編碼來(lái)判斷,因?yàn)橹形牡木幋a區(qū)間為:0x4e00--0x9fbb, 但通用區(qū)間來(lái)判斷中文也不非常精確,因?yàn)橛行┲形牡臉?biāo)點(diǎn)符號(hào)利用區(qū)間判斷會(huì)得到錯(cuò)誤的結(jié)果。所以通過(guò)Character.UnicodeBlock來(lái)進(jìn)行判斷。代碼如下:
package cn.csrc.base.count; public class CountCharacter { public static void main(String[] args) { String str ="我愛(ài)你abcd123中國(guó) #!"; CountCharacter countCharacter = new CountCharacter(); countCharacter.count(str); } /**中文字符 */ private int chCharacter = 0; /**英文字符 */ private int enCharacter = 0; /**空格 */ private int spaceCharacter = 0; /**數(shù)字 */ private int numberCharacter = 0; /**其他字符 */ private int otherCharacter = 0; //記錄中文字符 private StringBuilder sb1=new StringBuilder(); //記錄英文字符 private StringBuilder sb2=new StringBuilder(); //記錄數(shù)字 private StringBuilder sb3=new StringBuilder(); //記錄特殊字符 private StringBuilder sb4=new StringBuilder(); /*** * 統(tǒng)計(jì)字符串中中文,英文,數(shù)字,空格等字符個(gè)數(shù) * @param str 需要統(tǒng)計(jì)的字符串 */ public void count(String str) { if(str.equals("") || str==null){ System.out.println("字符串為空"); return; } for (int i = 0; i < str.length(); i++) { char tmp = str.charAt(i); if ((tmp >= 'A' && tmp <= 'Z') || (tmp >= 'a' && tmp <= 'z')) { enCharacter ++; sb2.append(tmp+" "); } else if ((tmp >= '0') && (tmp <= '9')) { numberCharacter ++; sb3.append(tmp +" "); } else if (tmp ==' ') { spaceCharacter ++; } else if (isChinese(tmp)) { chCharacter ++; sb1.append(tmp+" "); } else { otherCharacter ++; sb4.append(tmp +" "); } } System.out.println("字符串:" + str + " \r\n"); System.out.println("中文字符有:" + chCharacter +"個(gè) ("+sb1.toString()+")"); System.out.println("英文字符有:" + enCharacter +"個(gè) ("+sb2.toString()+")"); System.out.println("數(shù)字有:" + numberCharacter+"個(gè) ("+sb3.toString()+")"); System.out.println("空格有:" + spaceCharacter+"個(gè)"); System.out.println("其他字符有:" + otherCharacter+"個(gè) ("+sb4.toString()+")"); } /*** * 判斷字符是否為中文 * @param ch 需要判斷的字符 * @return 中文返回true,非中文返回false */ private boolean isChinese(char ch) { //獲取此字符的UniCodeBlock Character.UnicodeBlock ub = Character.UnicodeBlock.of(ch); // GENERAL_PUNCTUATION 判斷中文的“號(hào) // CJK_SYMBOLS_AND_PUNCTUATION 判斷中文的。號(hào) if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOG RAPHS_EXTENSION_B || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) { System.out.println(ch + " 是中文"); //sb1.append(ch+" "); return true; } return false; } }
結(jié)果如下:
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