Java CharArrayReader.mark(int readAheadLimit)方法範例

Java CharArrayReader.mark(int readAheadLimit)方法範例

CharArrayReader的CharArrayReader.mark(int readAheadLimit)方法的語法如下。

public void mark(int readAheadLimit)  throws IOException

範例

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

import java.io.CharArrayReader;

public class Main {
  public static void main(String[] args) throws Exception {

    char[] ch = { 'A', 'B', 'C', 'D', 'E' };

    // At: w Ｗｗ .ＹＩＩ b aＩ .ｃ ＯM 
    CharArrayReader car = new CharArrayReader(ch);

    // read and print the characters from the stream
    System.out.println(car.read());
    System.out.println(car.read());

    // mark() is invoked at this position
    car.mark(0);
    System.out.println("Mark() is invoked");
    System.out.println(car.read());
    System.out.println(car.read());

    // reset() is invoked at this position
    car.reset();
    System.out.println("Reset() is invoked");
    System.out.println(car.read());
    System.out.println(car.read());
    System.out.println(car.read());

  }
}

上面的程式碼生成以下結果。

65
66
Mark() is invoked
67
68
Reset() is invoked
67
68
69