Manipulação de Arquivo TXT

int count = 0;
   while((linha = reader.readLine()) != null){
	            String[] leitura = linha.split(";");

	            if(leitura[count].equals("String")){
                       leitura[count] = "";
	            }
          count++;
}

String teste = "Teste de String";
teste.replaceAll("Teste de String", "");

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class FileDecoder {
	private BufferedReader file;
	
	public FileDecoder(String filename) {
		try {
			file = new BufferedReader(new FileReader(filename));
		} catch (FileNotFoundException e) {
			throw new IllegalArgumentException(e);
		}
	}

	public void decode(FileContentFilter filter, FileContentCallback callback) {
		try {
			String line = file.readLine();
			
			while (line != null) {
				if (filter.lineMatch(line)) {
					callback.processLine(line, file);
				}
				line = file.readLine();
			}
			
		} catch (IOException e) {
			throw new RuntimeException(e);
		} finally {
			try {
				file.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static void main(String[] args) throws Exception {
		// abre o arquivo p/ leitura
		FileDecoder fileDecoder = new FileDecoder("bin/data.txt");
		
		// processa todas as linhas do arquivo
		fileDecoder.decode(new FileContentFilter() {
			public boolean lineMatch(String line) {
				String cleanLine = line.trim();
				return !"".equals(cleanLine) && !cleanLine.startsWith("CLIPS>");
			}
		}, new FileContentCallback() {
			public void processLine(String currentLine, BufferedReader file)
					throws IOException {
				System.out.println(currentLine);
			}
		});
	}
	
}

interface FileContentFilter {
	boolean lineMatch(String line);
}

interface FileContentCallback {
	void processLine(String currentLine, BufferedReader file) throws IOException;
}