Java BufferedReader.mark(int readAheadLimit)方法範例

Java BufferedReader.mark(int readAheadLimit)方法範例

BufferedReader中的BufferedReader.mark(int readAheadLimit)方法具有以下語法。

public void mark(int readAheadLimit)  throws IOException

範例

在下面的程式碼中展示了如何使用BufferedReader.mark(int readAheadLimit)方法。

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;

public class Main {
  public static void main(String[] args) throws Exception {
    InputStream is = new FileInputStream("c:/test.txt");

    InputStreamReader isr = new InputStreamReader(is);

    BufferedReader br = new BufferedReader(isr);

    System.out.println((char) br.read());
    System.out.println((char) br.read());

    br.mark(26);
    System.out.println("mark() invoked");
    System.out.println((char) br.read());
    System.out.println((char) br.read());

    br.reset();
    System.out.println("reset() invoked");
    System.out.println((char) br.read());
    System.out.println((char) br.read());

  }
}