Issue with the java regex

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Java

regular-expression

Hi. I have a text file. Content of the text file looks something like this

ms:{some text}; gl:{some text}; ms:{some text};
I need to extract the text and group it on the basis of the heading(By heading i mean to say ms, gs). Here is my code

import java.io.BufferedReader;
import java.io.File;

import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;



public class u{
	static int i=0;
	public static void main(String[] args) {
		File file=new File("File location");
		try {
			BufferedReader br =new BufferedReader(new FileReader(file.getAbsoluteFile()));
			String input;
			StringBuilder sb=new StringBuilder();
			while((input=br.readLine())!=null){
				sb.append(input);
			}
			input=sb.toString();
			Pattern pattern=Pattern.compile("(.*?):\\{(.*?)\\};");
			Matcher matcher=pattern.matcher(input);
			//System.out.println(input);
			if(matcher.find()){
				System.out.println("i");
				System.out.println(matcher.group(1));
				/*if(matcher.group(2)!=null){
					System.out.println(matcher.group(2));
				}*/
				//System.out.println(matcher.group(1));
			}
			//System.out.println(i);
		} 
		catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
}

Regex does not seem to be working. What is the problem with my code?