📅 最后修改于: 2020-09-27 02:34:58 🧑 作者: Mango
Java DataOutputStream类允许应用程序以与机器无关的方式将原始Java数据类型写入输出流。
Java应用程序通常使用数据输出流来写入数据，以后可以由数据输入流读取。
让我们看一下java.io.DataOutputStream类的声明：
public class DataOutputStream extends FilterOutputStream implements DataOutput
| Method | Description |
|---|---|
| int size() | It is used to return the number of bytes written to the data output stream. |
| void write(int b) | It is used to write the specified byte to the underlying output stream. |
| void write(byte[] b, int off, int len) | It is used to write len bytes of data to the output stream. |
| void writeBoolean(boolean v) | It is used to write Boolean to the output stream as a 1-byte value. |
| void writeChar(int v) | It is used to write char to the output stream as a 2-byte value. |
| void writeChars(String s) | It is used to write string to the output stream as a sequence of characters. |
| void writeByte(int v) | It is used to write a byte to the output stream as a 1-byte value. |
| void writeBytes(String s) | It is used to write string to the output stream as a sequence of bytes. |
| void writeInt(int v) | It is used to write an int to the output stream |
| void writeShort(int v) | It is used to write a short to the output stream. |
| void writeShort(int v) | It is used to write a short to the output stream. |
| void writeLong(long v) | It is used to write a long to the output stream. |
| void writeUTF(String str) | It is used to write a string to the output stream using UTF-8 encoding in portable manner. |
| void flush() | It is used to flushes the data output stream. |
在此示例中，我们使用DataOutputStream类将数据写入文本文件testout.txt。
package com.javatpoint;
import java.io.*;
public class OutputExample {
public static void main(String[] args) throws IOException {
FileOutputStream file = new FileOutputStream(D:\\testout.txt);
DataOutputStream data = new DataOutputStream(file);
data.writeInt(65);
data.flush();
data.close();
System.out.println("Succcess...");
}
}
输出：
Succcess...
testout.txt：
A