IO--Reader

java.io.Reader的相关方法的使用

欢迎各位朋友指正

public class Test_IO_Reader {public static void main(String[] args) {//设置3个字符的缓存区CharBuffer cb = CharBuffer.allocate(3);char[] c = new String("Hello World").toCharArray();Reader car = new CharArrayReader(c);try {//开始处标记，读取超过20个字符，将不能resetcar.mark(20);//读取3个字符到缓冲区car.read(cb);System.out.println("打印缓存区的字符串");System.out.println(new String(cb.array()));char ch;System.out.println("继续读流");while ((ch = (char) car.read()) != -1) {System.out.println(ch);//跳过一个字符car.skip(1);//是否可以保证下次read不阻塞if (!car.ready()) {break;}}//重置该流，回到标记处car.reset();System.out.println("重置之后读流");while ((ch = (char) car.read()) != -1) {System.out.println(ch);car.skip(1);if (!car.ready()) {break;}}}catch (IOException e) {e.printStackTrace();}}}

运行结果：

打印缓存区的字符串Hel继续读流l ol重置之后读流HloWrd