使用matches()将该字符串与Regex匹配。 如果匹配,则返回true。 下面提出了上述算法的伪代码,具体如下。 publicstaticbooleanisStringOnlyAlphabet(Stringstr){return((!str.equals(""))&&(str!=null)&&(str.matches("^[a-zA-Z]*$")));} Java Copy 例子 // Java Program to Check If String Contains Only...
I want to check if my string contains a + character.I tried following code s= "ddjdjdj+kfkfkf"; if(s.contains ("\\+"){ String parts[] = s.split("\\+); s=
在Java中,最简单直接的方法是使用String类中的contains方法。该方法会检查一个字符串是否包含另一个字符串。下面是其用法的示例: publicclassSubstringCheck{publicstaticvoidmain(String[]args){Stringstr1="Hello, World!";Stringstr2="World";if(str1.contains(str2)){System.out.println(str2+" 是 "+str1+...
public static void main(String [] args) throws Exception{ System.out.println("请输入数字:"); BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); String line=br.readLine(); if(line.matches("\\d+")) //正则表达式 详细见java.util.regex 类 Pattern System.out.println("数...
importjava.util.regex.Pattern;importjava.util.regex.Matcher;publicclassRegexExample{publicstaticvoidmain(String[]args){StringinputString="我喜欢编程和学习新技术";StringsubstringToCheck="编程";booleancontainsSubstring=containsSubstring(inputString,substringToCheck);if(containsSubstring){System.out.println("字...
使用String.matches方法判断是否包含子串,注意正则表达式元字符的转义 boolean matches(String regex) Tells whether or not this string matches the given regular expression. if (str.matches(".*"+sub+".*")) { // do something } StringUtils.contains ...
publicclassRegexExample{publicstaticvoidmain(String[]args){String text="Alice is 30 years old, and Bob is 25.";String regex="[0-9]+";// 正则表达式,匹配一个或多个数字boolean containsNumber=Pattern.compile(regex).matcher(text).find();System.out.println("字符串中是否包含数字: "+contains...
Stringtext="The quick brown fox jumps over the lazy dog";booleanresult=StringUtils.startsWithAny(text,"The","A","An");System.out.println(result);// true 3.2. Using Regex Another way to check if a string starts with specific values is to use regular expressions. Regular expressions allow ...
In this quick article, we’ve shown how to check if aStringcontains required characters.In the first scenario, we used regular expressions while in the second we took advantage of core Java classes. As usual, complete source code can be foundover on GitHub....
Java String Apache Commons Lang Regex Yes, we're now running theonlysale of the year - our Black Friday launch. All Courses are33% offuntilMonday, December 2nd: >> EXPLORE ACCESS NOW 1. Introduction Oftentimes while operating uponStrings, we need to figure out whether aStringis a valid nu...