java代码----------实现创建DataInputStream和DataOutputStream进行读写

package com.a.b;

import java.io.*;

public class testData {
public static void main(String[] args) throws IOException {
File newDir = new File("c:\\javas");
if (!newDir.exists()) {
newDir.mkdir();// 如果目录不存在，就创建目录

File newFile = new File(newDir, "test.txt");
try {
newFile.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}// 创建文件对象
// 建立DataInputStream 流
DataOutputStream dos = null;
try {
dos = new DataOutputStream(new FileOutputStream(newFile));
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
dos.writeInt(10);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}// 写入整型数据m
dos.writeBoolean(true);// 写入boolean型数据
dos.writeFloat(23.2f);// 写入浮点型double型
dos.writeChars("writeen into file");// 写入字符串
dos.close();
System.out.println("LIST ths file content");
// 建立DataInputStream流
DataInputStream dis = new DataInputStream(new FileInputStream(
newFile));
System.out.println(dis.readChar());
System.out.println(dis.readInt());
System.out.println(dis.readBoolean());
char c;
while ((c = dis.readChar()) != -1) {
System.out.println(c);// 读取字符串
dis.close();
}

}

}
}