Java例程练习（字节流)

import java.io.*;

public class Test {
	public static void main(String[] args) {
		int b = 0;
		FileInputStream in = null;
		
		try {
			
			in = new FileInputStream("C:/java/Test.java");
			
		} catch (FileNotFoundException e) {
			System.out.println("找不到指定文件");
			System.exit(-1);
		}
		
		try {
			
			long num = 0;
			while((b = in.read()) != -1) {
				System.out.print((char)b);
				num ++;
			}
			
			in.close();
			System.out.println();
			System.out.println("共读取了" + num + " 个字节");
			
		} catch (IOException e) {
			System.out.println("文件读取错误");
			System.exit(-1);
		}
		
		
	}
}

import java.io.*;

public class Test {
	public static void main(String[] args) {
		int b = 0;
		FileInputStream in = null;
		FileOutputStream out = null;
		
		try {
			in = new FileInputStream("C:/java/Test.java");
			out = new FileOutputStream("C:/java/A/HW.java");

			while((b = in.read()) != -1) {
				out.write(b);
				
			}
			
			in.close();
			out.close();
		} catch (FileNotFoundException e) {
			System.out.println("找不到指定文件");
			System.exit(-1);
		} catch (IOException e) {
			System.out.println("文件复制错误");
			System.exit(-1);
		}
		
		System.out.println("文件已复制");
		
	}
}