2021-09-08 IO流(读取转换流)

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clipboard.png

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

public class TransStreamDemo {

    public static void main(String[] args) throws IOException {
        InputStream in = System.in;
        // 将字节流对象转换为字符流对象，使用转换流，InputStreamReader
        InputStreamReader isr = new InputStreamReader(in);
        // 为了提高效率，将字符串进行缓冲区技术高效操作，使用BufferedReader
        BufferedReader bufr = new BufferedReader(isr);
        String line;
        while ((line = bufr.readLine()) != null) {
            if ("over".equals(line)) {
                break;
            }
            System.out.println(line.toUpperCase());
        }
        bufr.close();
    }

}