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}String[] arr =str.split(" ");if(arr.length != pattern.length()) {returnfalse; } HashMap<Character,String> map = new HashMap<Character,String>();for(int i=0; i<pattern.length(); i++) {charch = pattern.charAt(i);if(map.containsKey(ch)) {if(!map.get(ch).equals(arr[i]))...
boolean b = Pattern.matches("a*b", "aaaaab"); </blockquote> is equivalent to the three statements above, though for repeated matches it is less efficient since it does not allow the compiled pattern to be reused. Instances of this class are immutable and are safe for use by multiple ...
Pattern p = Pattern.compile("a*b"); Matcher m = p.matcher("aaaaab"); boolean b = m.matches(); Amatchesmethod is defined by this class as a convenience for when a regular expression is used just once. This method compiles an expression and matches an input sequence against it in a...
if(pattern.length() != words.length) returnfalse; Map<Character, String> map =newHashMap<Character, String>(); for(inti =0; i < pattern.length(); i++){ chart = pattern.charAt(i); if(map.containsKey(t)){ if(!words[i].equals(map.get(t))) ...
public void register(String username, String email) { this.username = Validate.notBlank(username, "用户名不能为空"); Validate.matchesPattern(email, EMAIL_REGEX, "邮箱格式错误"); // 自定义校验器 Validate.inclusiveBetween(18, 100, age, "年龄必须在18-100岁之间"); } 优势对比: 代码量:减少60...
8.6 在 java.lang.String 中等价的 Pattern 方法 java.lang.String 通过模拟 java.util.regex.Pattern 行为的几个方法,也可以支持正则表达式。方便起见,下面主要摘录了出现在 API 关键的方法。 public boolean matches(String regex):告知字符串是否匹配给定的正则表达式。调用 str.matches(regex)方法所产生的结果与作...
Instead of giving input in the code, using Scanner class in Java, we can read input at runtime itself. So, making use of this for our problem, we read the inputs – number whose log has to be found (n) and the base for log (b). ...
<url-pattern>/servlets/servlet/*</url-pattern> </servlet-mapping> 1. 2. 3. 4. 中配置,PathInfo 是我们请求的具体的 Servlet,QueryString 是要传递的参数,注意这里是在浏览器里直接输入 URL 所以是通过 Get 方法请求的,如果是 POST 方法请求的话,QueryString 将通过表单方式提交到服务器端。
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