Question

我有两个程序。一个输出一些信息：

import java.io.*;
import java.util.Arrays;
import java.util.Date;

public class Output {
    public static void main(String[] args) throws ClassNotFoundException,
            IOException {

        int[] numbers = { 1, 2, 3, 4, 5 };

        // Create an output stream for binary file
        try (ObjectOutputStream output = new ObjectOutputStream(
                new FileOutputStream("Exercise7_05.dat", true));) 
        {
            // Write to each type to the file
            output.writeDouble(5.5);
            output.writeObject(numbers);
            output.writeObject(new java.util.Date());
            output.writeUTF("Exercise7_05.dat");
        }
    }
}

另一个应该读取二进制输入并将其打印到控制台：

import java.io.*;
import java.util.Arrays;
import java.util.Date;

public class Input {
    public static void main(String[] args) throws ClassNotFoundException,
            IOException {

        /*
         * Create an input stream for binary file to be converted to something
         * readable
         */
        try (ObjectInputStream input = new ObjectInputStream(
                new FileInputStream("Exercise7_05.dat"));) {

            // Read each object from binary file
            double doubleValue = input.readDouble();
            System.out.println("Double value: " + doubleValue);

            int[] newNumbers = (int[]) (input.readObject());
            System.out.println("Integers: " + Arrays.toString(newNumbers));

            Date date = (java.util.Date) (input.readObject());
            System.out.println("DateTime: " + date);

            String fileName = input.readUTF();
            System.out.println("File name: " + fileName);
        }
    }
}

我的问题是，当我尝试运行输入流时出现错误：

＆＃34;线程中的异常＆＃34; main＆＃34; java.io.FileNotFoundException：Exercise7_05.dat（系统找不到指定的文件） at java.io.FileInputStream.open（Native Method）在java.io.FileInputStream。（未知来源）在java.io.FileInputStream。（未知来源）在application.Input.main（Input.java:18）＆＃34;

二进制I / O流

0 个答案: