I\O流实训

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import java.io.FileInputStream;
import java.io.FileOutputStream;
public class file {
    public static void main(String[] args) {
        String file = new String ("data.txt");
        try {
           FileOutputStream out = new FileOutputStream(file);
        byte str[] = "12345abcdef@#%&*软件工程".getBytes();
           out.write(str);
           out.close();
        }
        catch(Exception e) {
           e.printStackTrace();
        }
        try {
           FileInputStream in = new FileInputStream(file);
        byte yhl[] = new byte[1024];
        int mr = in.read(yhl);
        
        System.out.println("文件是: "+new String(yhl,0,mr));
        in.close();

        }

        catch (Exception e) {
        e.printStackTrace();
        }
        }
    }

 

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