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📜  java 正则表达式组不起作用 - Java 代码示例

📅  最后修改于: 2022-03-11 14:52:03.996000             🧑  作者: Mango

代码示例1
You need to call find() on the Matcher before you can call group() and related functions:

if (m.find()) {
    System.out.println("id = " + m.group(1));
}