java怎么把字符串中的的汉字取出来？ java 如何截取汉字字符串中的汉字
java\u600e\u4e48\u628a\u5b57\u7b26\u4e32\u4e2d\u7684\u7684\u6c49\u5b57\u53d6\u51fa\u67651.\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u5168\u662f\u6c49\u5b57\u3002
String str1 = "java\u5224\u65ad\u662f\u5426\u4e3a\u6c49\u5b57"
String str2 = "\u5168\u4e3a\u6c49\u5b57"
String reg = "[\\u4e00-\\u9fa5]+"
boolean result1 = str1.matches(reg)//false
boolean result2 = str2.matches(reg)//true
2.\u63d0\u53d6\u5b57\u7b26\u4e32\u4e2d\u7684\u6c49\u5b57\u3002
String str = "java\u600e\u4e48\u628aasdasd\u5b57\u7b26\u4e32\u4e2d\u7684asdasd\u7684\u6c49\u5b57\u53d6\u51fa\u6765"
String reg = "[^\u4e00-\u9fa5]"
str = str.replaceAll(reg, " ")
System.out.println(str)
3.\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u542b\u6709\u6c49\u5b57\u3002
boolean result = (str.length() == str.getBytes().length)//true:\u65e0\u6c49\u5b57 false:\u6709\u6c49\u5b57
4.\u83b7\u53d6\u5b57\u7b26\u4e32\u4e2d\u6c49\u5b57\u7684\u4e2a\u6570\u3002
int count = 0
String reg = "[\\u4e00-\\u9fa5]"
String str = "java\u83b7\u53d6\u6c49\u5b57Chinese\u7684\u4e2a\u6570"
Pattern p = Pattern.compile(reg)
Matcher m = p.matcher(str)
while (m.find()) {for (int i = 0; i <= m.groupCount(); i++) {count = count + 1}}
System.out.println("\u5171\u6709\u6c49\u5b57 " + count + "\u4e2a "\uff09
String b = a.substring(0,1);
1.判断字符串是否全是汉字。
String str1 = "java判断是否为汉字"
String str2 = "全为汉字"
String reg = "[\\u4e00-\\u9fa5]+"
boolean result1 = str1.matches(reg)//false
boolean result2 = str2.matches(reg)//true
2.提取字符串中的汉字。
String str = "java怎么把asdasd字符串中的asdasd的汉字取出来"
String reg = "[^\u4e00-\u9fa5]"
str = str.replaceAll(reg, " ")
System.out.println(str)
3.判断字符串中是否含有汉字。
boolean result = (str.length() == str.getBytes().length)//true:无汉字 false:有汉字
4.获取字符串中汉字的个数。
int count = 0
String reg = "[\\u4e00-\\u9fa5]"
String str = "java获取汉字Chinese的个数"
Pattern p = Pattern.compile(reg)
Matcher m = p.matcher(str)
while (m.find()) {for (int i = 0; i <= m.groupCount(); i++) {count = count + 1}}
System.out.println("共有汉字 " + count + "个 "）
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