JAVA二进制的读写

测试代码

import java.io.*;

public class BinaryWR {
public static void main(String[] args) throws IOException{
String fileName="dada.dat";
int value0=1024,value1=0,value2=-2048;

BufferedOutputStream bo= new BufferedOutputStream(new FileOutputStream(fileName));
DataOutputStream out= new DataOutputStream(bo);//装配
out.writeInt(value0);//指定写的类型
out.writeDouble(value1);
out.writeFloat(value2);

out.close();//关闭文件

BufferedInputStream bi=new BufferedInputStream(new FileInputStream(fileName));

DataInputStream in=new DataInputStream(bi);//装配
System.out.println(in.readInt());//指定读的类型
System.out.println(in.readDouble());
System.out.println(in.readFloat());
in.close();//关闭文件
}
}

运行结果