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

public class RegularExpressionReplace {
    public static void main(String[] args) {
        String reg = "[0-9b-c]";
        String text = "bcbcbcbbbbRbbboccbcbscbbbeibbndccibba" +
                                ".nbbebbtbbpbbvbbtbb.bbtccdcc" +
                               " 1232 4 4545454 4545 454 5465 4";
        String replacingtext = "";
        System.out.println("Text before replacing is:-"+"\n"+text);
        Pattern pattern = Pattern.compile(reg);
        Matcher matcher = pattern.matcher(text);
        StringBuffer buffer = new StringBuffer();
        while (matcher.find()) {
            matcher.appendReplacement(buffer,replacingtext);
        }
        matcher.appendTail(buffer);
        System.out.println("====================================");
        System.out.print("Text after replacing is:-");
        System.out.println(buffer.toString());
    }
}