测试正则表达式

用于验证正则表达式是否具备你所期待的匹配功能

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/** * Created by Donald on 2016/12/6. */
/** * Allows you to easily try out regular expressions. */
public class TestRegularExpression {
    public static void main(String []args){
        if(args.length < 2){
            System.out.println("Usage: njava TestRegularExpression " +
                "characterSequence regularExpression+");
            System.exit(0);
        }
        System.out.println("Input: "" + args[0] + """);
        for (String arg : args){
            System.out.println("Regular expression: "" + arg + """);
            Pattern p = Pattern.compile(arg);
            Matcher m = p.matcher(args[0]);
            while(m.find()){
                System.out.println("Math "" + m.group() + "" at positions " +
                    m.start() + "-" + (m.end() - 1));
            }
        }
    }
}

利用args输入 {Args: abcabcabcdefabc “abc+” “(abc)+” “(abc){2,}”}

下面是IDEA的设置

结果图

（编辑：李大同）

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