ObjectInputStream readDouble()方法

java.io.ObjectInputStream.readDouble() 方法读取一个64位的double。

1 语法

public double readDouble()

2 参数

无

3 返回值

返回64位double值。

4 示例 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.io.ObjectInputStream.readDouble() 方法的例子
 */
import java.io.*;

public class Demo {
    public static void main(String[] args) {
        double b = 0380549705498d;

        try {
            // create a new file with an ObjectOutputStream
            FileOutputStream out = new FileOutputStream("test.txt");
            ObjectOutputStream oout = new ObjectOutputStream(out);

            // write something in the file
            oout.writeDouble(b);
            oout.writeDouble(49753986394864d);
            oout.flush();

            // create an ObjectInputStream for the file we created before
            ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

            // read and print a double
            System.out.println("" + ois.readDouble());

            // read and print a double
            System.out.println("" + ois.readDouble());
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

输出结果为：

3.80549705498E11
4.9753986394864E13