//利用正则表达式匹配输入内容
package regex;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner in = new Scanner(System.in);
System.out.println("Enter pattern:");
String patternString = in.nextLine();
Pattern pattern = Pattern.compile(patternString);
while(true){
System.out.println("Enter String to match: ");
String input = in.nextLine();
if(input == null || input.equals(""))
return;
Matcher matcher = pattern.matcher(input);
if(matcher.matches()){
System.out.println("Match");
int g = matcher.groupCount();
if(g > 0){
for(int i = 0; i < input.length(); i++){
for(int j = 1; j <= g; j++){
if(i == matcher.start(j) && i == matcher.end(j)){
System.out.println("()");
}
}
for(int j = 1; j <= g; j++){
if(i == matcher.start(j) && i != matcher.end(j)){
System.out.println('(');
}
}
System.out.println(input.charAt(i));
for(int j = 1; j <= g; j++){
if(i + 1 != matcher.start(j) && i + 1 == matcher.end(j)){
System.out.println(')');
}
}
}
System.out.println();
}
}
else
System.out.println("No match");
}
}
}
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