点击展开查看代码实现 使用String contains Stringstr="Hello, world!";booleanresult=str.contains("world"); 1. 2. 使用正则表达式 importjava.util.regex.*;Stringstr="Hello, world!";Patternpattern=Pattern.compile("w.*d");Matchermatcher=pattern.matcher(str);booleanmatches=matcher.find(); 1. 2. 3...
正则表达式(英语：Regular Expression，在代码中常简写为regex、regexp或RE)使用单个字符串来描述、匹配一...
下面是使用Matcher类进行匹配和查找的一个例子: importjava.util.regex.Matcher;importjava.util.regex.Pattern;publicclassStringContainsExample{publicstaticvoidmain(String[]args){Stringstr="Hello, world!";Stringpattern="world";Patternp=Pattern.compile(pattern);Matcherm=p.matcher(str);booleanresult=m.find(...
import java.util.regex.Pattern; import java.util.regex.Matcher; public class Main { public static void main(String[] args) { Pattern p1 = Pattern.compile("a.*b"); //输出false,默认点(.)没有匹配换行符 System.out.println(p1.matcher("a\nb").find()); Pattern p2 = Pattern.compile("a...
import java.util.regex.Matcher; public class Main { public static void main(String[] args) { Pattern p1 = Pattern.compile("a.*b"); //输出false,默认点(.)没有匹配换行符 System.out.println(p1.matcher("a\nb").find()); Pattern p2 = Pattern.compile("a.*b", Pattern.DOTALL); ...
String regex= "(.)\\1+"; //组的概念,(.)表示任意字符、\\1表示引用第一组(.) “+”至少出现一次//正则表达式对象Pattern p =Pattern.compile(regex);//匹配对象Matcher matcher =p.matcher(str); String res= matcher.replaceAll("$1"); //$1:指的是第一组的一个元素 ...
object1与object2是两个独立的对象，但object2的初始值是由object1对象确定的。在Java语言中，用简单的...
Namespace: Java.Util.Regex Assembly: Mono.Android.dll A compiled representation of a regular expression.C# 复制 [Android.Runtime.Register("java/util/regex/Pattern", DoNotGenerateAcw=true)] public sealed class Pattern : Java.Lang.Object, IDisposable, Java.Interop.IJavaPeerable, Java.IO.I...
// check whether a string contains only numbersclassMain{publicstaticvoidmain(String[] args){// a search pattern for only numbersString regex ="^[0-9]+$"; System.out.println("123a".matches(regex));// false System.out.println("98416".matches(regex));// true ...
Creates a predicate that tests if this pattern is found in a given input string. Clone() Creates and returns a copy of this object. (Inherited from Object) Compile(String, RegexOptions) Compiles the given regular expression into a pattern with the given flags. Compile(String) Compiles ...