redirecting.java

来自「翁剀JAVA语言那门课程的教案 很多人都看多他的视频教程可惜没有ppt的教案」· Java 代码 · 共 34 行

//: Redirecting.java
// Demonstrates the use of redirection for standard io in Java 1.1

import java.io.*;

class Redirecting {
	public static void main(String[] args) {
		try {
			BufferedInputStream in = 
				new BufferedInputStream(
					new FileInputStream(
						"Redirecting.java"));
			//	Produces deprecation message
			PrintStream out = 
				new PrintStream(
					new BufferedOutputStream(
						new FileOutputStream(
							"test.out")));
			System.setIn(in);
			System.setOut(out);
			System.setErr(out);
			
			BufferedReader br = 
				new BufferedReader(
					new InputStreamReader(System.in));
			String s;
			while ( (s=br.readLine() ) != null )
				System.out.println(s);
			out.close();		//	Remember this!
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}