ObjectOutputStream writeDouble()方法

java.io.ObjectOutputStream.writeDouble(double val) 此方法写入64位double。

1 语法

public void writeDouble(double val)

2 参数

val：要写入的双精度值。

3 返回值

无

4 示例 

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 * java.io.ObjectOutputStream.writeDouble(double val)方法的例子
 */
import java.io.*;

public class Demo {
    public static void main(String[] args) {
        double d = 1.59875d;

        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(d);
            oout.writeDouble(9673.49764d);

            // close the stream
            oout.close();

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

            // read and print what we wrote before
            System.out.println("" + ois.readDouble());
            System.out.println("" + ois.readDouble());
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

输出结果为：

1.59875
9673.49764