find and substring

**import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Findandreplace { BufferedReader keybord=null;

public void findsubstring() {
    try {
    keybord=new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter find String");
    String findstring = keybord.readLine();
    String substring = keybord.readLine();
    findreplace(findstring,substring);

    } catch(IOException io){            
    }
}
public void findreplace(String find, String replace) {
    Pattern pattern = Pattern.compile(find);
    //CharSequence chsequence=replace;
    Matcher matcher = pattern.matcher(replace);
    StringBuffer sb = new StringBuffer();
    while (matcher.find()) {
        System.out.println(matcher.group(1));
       // matcher.appendReplacement(sb, replace);
    }
     //if(find.contains(replace){}----->
    /*String string = "I will come and meet you at the 123woods";
    String keyword = "123woods";
    Boolean found = Arrays.asList(string.split(" ")).contains(keyword);
    if(found){
          System.out.println("Keyword matched the string");
    }*/
    }

public static void main(String[] args) { Findandreplace substring = new Findandreplace(); substring.findsubstring(); } }**