Java.io.ObjectOutputStream.writeFloat()方法實例
java.io.ObjectOutputStream.writeFloat(float val) 方法寫入一個32位浮點值。
聲明
以下是java.io.ObjectOutputStream.writeFloat()方法的聲明
public void writeFloat(float val)
參數
-
val -- 將要寫入的浮點值
返回值
此方法冇有返回值。
異常
-
IOException -- 如果在寫入底層流發生I / O錯誤
例子
下麵的示例演示java.io.ObjectOutputStream.writeFloat()方法的用法。
package com.yiibai; import java.io.*; public class ObjectOutputStreamDemo { public static void main(String[] args) { float f = 1.59875f; 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.writeFloat(f); oout.writeFloat(49.7634764f); // 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.readFloat()); System.out.println("" + ois.readFloat()); } catch (Exception ex) { ex.printStackTrace(); } } }
讓我們編譯和運行上麵的程序,這將產生以下結果:
1.59875 49.763477